The Project Gutenberg eBook of The Avifauna of Micronesia, Its Origin, Evolution, and Distribution This ebook is for the use of anyone anywhere in the United States and most other parts of the world at no cost and with almost no restrictions whatsoever. You may copy it, give it away or re-use it under the terms of the Project Gutenberg License included with this ebook or online at www.gutenberg.org. If you are not located in the United States, you will have to check the laws of the country where you are located before using this eBook. Title: The Avifauna of Micronesia, Its Origin, Evolution, and Distribution Author: Rollin H. Baker Release date: April 14, 2013 [eBook #42537] Language: English Credits: Produced by Chris Curnow, Matthias Grammel, Joseph Cooper, The Internet Archive for some images and the Online Distributed Proofreading Team at http://www.pgdp.net *** START OF THE PROJECT GUTENBERG EBOOK THE AVIFAUNA OF MICRONESIA, ITS ORIGIN, EVOLUTION, AND DISTRIBUTION *** Produced by Chris Curnow, Matthias Grammel, Joseph Cooper, The Internet Archive for some images and the Online Distributed Proofreading Team at http://www.pgdp.net UNIVERSITY OF KANSAS PUBLICATIONS MUSEUM OF NATURAL HISTORY VOLUME 3 · 1951 EDITORS E. RAYMOND HALL, _Chairman_ A. BYRON LEONARD EDWARD H. TAYLOR ROBERT W. WILSON MUSEUM OF NATURAL HISTORY UNIVERSITY OF KANSAS LAWRENCE 1951 MUSEUM OF NATURAL HISTORY UNIVERSITY OF KANSAS LAWRENCE PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1951 [Illustration] 24-1811 CONTENTS 1. The Avifauna of Micronesia, Its Origin, Evolution, and Distribution. By Rollin H. Baker. Pp. 1-359, 16 figures in text. June 12, 1951 2. A Quantitative Study of the Nocturnal Migration of Birds. By George H. Lowery, Jr. Pp. 361-472, 47 figures in text. June 29, 1951 3. Phylogeny of the Waxwings and Allied Birds. By M. Dale Arvey. Pp. 473-530, 49 figures in text, 13 tables. October 10, 1951 4. Birds from the State of Veracruz, Mexico. By George H. Lowery, Jr. and Walter W. Dalquest. Pp. 531-649, 7 figures in text, 2 tables. October 10, 1951 Index, Pp. 651-681. The Avifauna of Micronesia, Its Origin, Evolution, and Distribution BY ROLLIN H. BAKER University of Kansas Publications Museum of Natural History Volume 3, No. 1, pp. 1-359, 16 figures in text June 12, 1951 University of Kansas LAWRENCE 1951 The Avifauna of Micronesia, Its Origin, Evolution, and Distribution BY ROLLIN H. BAKER University of Kansas Publications Museum of Natural History Volume 3, No. 1, pp. 1-359, 16 figures in text June 12, 1951 University of Kansas LAWRENCE 1951 UNIVERSITY OF KANSAS PUBLICATIONS, MUSEUM OF NATURAL HISTORY Editors: E. Raymond Hall, Chairman, A. Byron Leonard, Edward H. Taylor, Robert W. Wilson =Volume 3, No. 1, pp. 1-359, 16 figures in text Published June 12, 1951= UNIVERSITY OF KANSAS Lawrence, Kansas PRINTED BY FERD VOILAND, JR., STATE PRINTER TOPEKA, KANSAS 1951 [Illustration] 22-8131 The Avifauna of Micronesia, Its Origin, Evolution, and Distribution By ROLLIN H. BAKER CONTENTS PAGE INTRODUCTION 5 DESCRIPTION OF MICRONESIA 5 Climate 8 Soils 9 Surface water 9 Vegetation 10 GAZETTEER OF THE ISLANDS OF MICRONESIA 11 Mariana Islands 11 Palau Islands 13 Caroline Islands 14 Marshall Islands 15 ORNITHOLOGICAL EXPLORATION IN MICRONESIA 16 CHECK-LIST OF THE BIRDS OF MICRONESIA 21 DISCUSSION OF THE AVIFAUNA 28 Oceanic Birds 28 Inshore Oceanic Birds 29 Offshore and Pelagic Oceanic Birds 30 Faunal Components 30 Migratory Shore Birds 32 Original Homes of the Shore Birds that Visit Micronesia 32 Routes of Migration 34 Populations of Shore Birds in Micronesia 37 Land and Fresh-Water Birds 42 Polynesian Component 44 Melanesian Component 44 Moluccan and Celebesian Components 45 Philippine Component 45 Palearctic Component 46 Speciation 48 Time of Colonization 50 Factors Causing Dispersal 52 Analysis of Speciation 55 CONSERVATION OF THE AVIFAUNA OF MICRONESIA 58 THE FUTURE OF ORNITHOLOGICAL RESEARCH IN MICRONESIA 60 METHODS AND ACKNOWLEDGMENTS 60 ACCOUNTS OF THE KINDS OF BIRDS IN MICRONESIA 63 SUMMARY AND CONCLUSIONS 340 BIBLIOGRAPHY 343 FIGURES IN TEXT FIGURE PAGE 1. The islands of Micronesia. 6 2. The Mariana Islands. 12 3. The Palau Islands. 13 4. The Caroline Islands. 15 5. The Marshall Islands. 16 6. Routes of migration used by shore birds in the Pacific. 34 7. Avifaunal regions of the central Pacific. 43 8. Faunal areas from which Micronesian birds have been derived. 46 9. Routes of dispersal of rails in the Pacific area. 120 10. Variation in length of culmen of _Sterna s. sumatrana_. 159 11. Geographic distribution of _Thalasseus bergii_. 164 12. Geographic distribution of _Gygis alba_ in the Pacific. 177 13. Distribution and dispersal of _Ptilinopus porphyraceus_. 190 14. Distribution and dispersal of _Gallicolumba_ in the Pacific. 204 15. Distribution and dispersal of _Acrocephalus_ in the Pacific. 260 16. Distribution and dispersal of _Myzomela_ in the Pacific. 316 INTRODUCTION Birds in Micronesia comprise the most outstanding animal life of the islands, as far as vertebrates are concerned. No fewer than 206 kinds, belonging to 37 families and 91 genera have been found there. Although this number upon first consideration may seem large, actually any large land mass in the same latitude has many more kinds of birds than does Micronesia. In this connection it is pertinent to recall that the islands of Micronesia are oceanic and have apparently been formed independently of any continental land mass. Thus, animal life found on these islands has reached them by overseas migration, either by some passive means or by individual effort. Zoogeographers have had some difficulty in explaining the presence of snails and other nonflying animals on isolated oceanic islands. Crampton, in his studies of the land snails of the genus _Partula_ at Guam and Saipan (1925:10), writes, "Despite the geological difficulties, the biological findings strongly support the view that the dominant process in this part of Oceania has been one of subsidence and of insular dissection." Although there exists today some question as to how certain forms of life have reached these remote dots of land, the ornithologist has not been much in doubt as to the actual _means_ of arrival of birds. With the exception of six kinds of birds which are definitely known to have been introduced by man, the birds have apparently reached these islands by flying there from somewhere else. The ornithologist is, therefore, concerned with learning _from where_, _by what route_, _when_, and _why_ the various species of birds came and _how_ they have become established on these islands of Micronesia. These birds exist in small populations; often less than 100 individuals of one kind may be found on a small island. How have such small numbers had the ability to survive and what environmental adaptations have occurred, are two additional questions which confront the student of Micronesian birds. DESCRIPTION OF MICRONESIA The vast expanse of the Pacific Ocean is dotted with numerous islands, most of which are concentrated in the central and western part and are known collectively as Oceania. Within Oceania three divisions are popularly recognized: Melanesia, Polynesia, and Micronesia. According to Krieger (1943:6), the Micronesia islands include the Mariana, Palau, Caroline, Marshall, and Gilbert islands; they may take in also the Volcano, Bonin, and Ellice islands (from the standpoint of anthropology). Zoogeographically, according to Wallace (1876), Micronesia is to be included in the Polynesian Subregion of the Australian Region. Mayr (1941a:193), on the basis of the distribution of birds, ranks Micronesia as one of the four subdivisions of the Polynesian Subregion, and includes within Micronesia the Palau, Caroline, Mariana, Marshall, and Gilbert islands. Except in the discussion of distribution, this report does not treat of the avifauna of the Gilbert Islands, which straddle the equator south of the Marshall Islands. This report is concerned only with the birds in the Mariana, Palau, Caroline, and Marshall islands formerly mandated to Japan, and with the birds of the island of Guam, which is a possession of the United States. [Illustration: FIG. 1. The Islands of Micronesia] The word Micronesia is, of course, derived from the Greek words _mikros_ meaning small and _nesos_ meaning island, and, as shown in figure 1, this term is appropriate, for the islands of this area are small. For the most part they are too small even for inclusion on standard-sized maps of the world. There are thousands of these islands in an area some 2,400 miles long from east to west and some 1,200 miles broad from north to south. All of the islands of Micronesia are oceanic islands; that is to say, they have never been connected to the Asiatic continent or to other land masses by means of land bridges. Geologists and oceanographers have shown (see descriptions by Hobbs, 1945), that islands of Micronesia are of two general types: arcuate and strewn. The Pacific Ocean is surrounded by rising mountain ranges which are arranged in elongated, near-circular arcs, which form an extended series of scallops. In the western Pacific these sweeping arcs extend into the ocean, where the mountain ranges project upward from the bottom of the sea with only the crests showing above the waves to point out, in dotted outline, the position of the mountains. The easternmost of these arcs is marked by the islands of the Aleutians, Kuriles, Japan, Izo, Bonins, Volcanoes, Marianas, Yap, Palaus, and others continuing southward into Melanesia. These are characterized by igneous rocks of andesitic nature. To the eastward of the arcuate islands in Micronesia, are numerous and irregularly distributed islands, making up all of the central and eastern Carolines and the Marshalls, which are known as strewn islands. Strewn islands mark the places of former volcanoes or volcanic peaks. If these volcanic peaks have been completely drowned and are now marked by a series of low islands edged by a protecting reef formed by coral growth enclosing a lagoon and with all exposures consisting of coral rock, the island is known as a coral atoll (example, Ulithi Atoll). Some of the coral exposures lack lagoons; they are known merely as coral islands (example, East Fayu). Some atolls become elevated by geologic activity and the lagoons may dry out or drain. The accumulation of guano of oceanic birds and the residue of fish and other organisms in the area of the lagoon remains as a rich phosphate deposit; these raised atolls have been called phosphate islands (example, Fais). Other strewn islands consist of igneous rocks which are exposed above the surface of the ocean. These are known as "high" or volcanic islands and may occur as a single mountain rising out of the ocean (example, Kusaie), or be partly drowned and surrounded by a coral reef (example, Truk). The igneous rocks found on these strewn islands are basaltic in nature. The Mariana Islands consist of a chain of volcanic islands approximately 450 miles long. As shown in figure 2, there are 14 single islands and one group of three islands (Maug), from Uracas in the north to Guam in the south. The Palau Islands which are situated in the easternmost part of Micronesia have often been considered from a political standpoint as part of the Caroline Islands. As shown in figure 3, the Palau Islands are a chain of islands approximately 120 miles long from north to south. Sonsorol, Tobi, Merir, Pulo Anna, and Helen Island occur to the southward of the Palaus and may be considered as part of the Carolines or as part of the Palaus. The Palaus together with the Carolines, to the eastward, extend in an east-west direction for approximately 1,700 miles. The Palaus and Carolines include (as shown in figures 3 and 4) 37 atolls, 34 banks, 11 coral islands without lagoons, 2 uplifted phosphate islands, 4 volcanic islands, and the Palau chain. The Marshall Islands to the extreme eastward extend approximately 700 miles from north to south and, as shown in figure 5, contain 29 atolls and five coral islands without lagoons. No volcanic exposures occur in the Marshall Islands. There is a total land surface of approximately 846 square miles in the islands of Micronesia. The Palaus and Carolines have 525 square miles, the Marianas 247 square miles, and the Marshalls 74 square miles of land surface. Guam has the largest land surface of any of the islands of Micronesia with 225 square miles, Ponapé has 145 square miles, and Babelthuap has 143 square miles. Asuncion, in the northern Marianas, has the highest elevation, rising as an almost perfect cone to a height of 2,923 feet; Ponapé reaches a height of 2,579 feet above the sea level. The volcanic islands are known as "high" islands, and the coral atolls are known as "low" islands. The coral islands usually rise but a few feet above sea level. CLIMATE In Micronesia there are two seasons: a wet summer and a dryer winter. Temperatures rarely go above 90° F. and rarely below 70° F. Rainfall in the Marianas averages approximately 85 inches per year, in the Palaus approximately 150 inches, in the Carolines it ranges from 129 to 185 inches, and in the Marshalls it goes up to 160 inches. The humidity is excessive, the average annual mean of relative humidity for selected islands in Micronesia being between 82 and 86 percent. The relative humidity is lower in the western Carolines and the Palaus, than in other parts of Micronesia. The Mariana Islands lie between the area of the Asiatic monsoon and the belt of the northeast trade winds. At Saipan from November until March or April, winds usually are easterly or northeasterly and are strong and steady since the northeast trades and the winter monsoon reinforce each other. In April and May the directions of the winds shift toward the southeast, and they become weaker and more variable. In this period there may be some easterly winds in addition to the predominating southeasterly winds. Detailed information is not available on the winds which occur in the Marianas north of Saipan, but at Pagan easterly winds probably prevail from May to July and westerly winds prevail in the remainder of the year. The Carolines lie in the belt of alternating northeast trade winds and southwest monsoons. The northeast trades begin in October and prevail until May or June. The southwest monsoon occurs from May to October and may be felt as far east as Truk. To the eastward, the winds of the summer are usually light and variable. In the Marshall Islands, the northeast trade winds predominate from about December to April, especially in the northern part of the Marshalls. In summer, winds are variable and weak; periods of calm may occur. Typhoons and squalls occur most frequently in the spring and summer in Micronesia. Some of the severe typhoons are known to engulf entire islands, as did the one at Woleai in 1907. SOILS The soils of the islands of Micronesia have been derived from volcanic materials or from depositions of coralline limestone. Volcanic soils occur on the "high" islands of Micronesia. In many places, especially on the islands of the northern Marianas there is little soil; there are large areas of bare igneous rock, because the islands are geologically of relatively recent origin and little erosion has occurred. On islands where volcanic rocks have decomposed, the resulting soil may have a top layer of humus. The richest soils of the islands are along drainage areas and in alluvial deposits. Coralline soils result from the decomposition of limestone, coral fragments, shells, and sand, and are overlain by some humus. Where the layer of humus is deep, the fertility is greatest. Coralline-volcanic soils occur on some "high" islands where coral rock and volcanic rock have become mixed in the decomposition process which forms soil. In parts of the Marianas and elsewhere, unwise practices of burning and overgrazing have allowed extensive erosion to occur, resulting in reduced fertility of the soil. On the island of Yap certain sedimentary rocks are exposed which are thought to have been elevated from the ocean bottom. Soils at Yap which have developed from this rock are considered more fertile than soils of coralline origin, although the fertility there also is dependent on the depth of the layer of humus. SURFACE WATER There is little fresh water on the coral atolls, but brackish marshes are present on some islands, and many of these marshes are used for the cultivation of taro by the natives. Some volcanic islands, on the other hand, possess small streams and fresh water lakes, producing suitable habitat for certain rails, gallinules and ducks. On the "low" islands in the Marshalls, natural surface pools are rare. VEGETATION The "high" islands of Micronesia support a heavy cover of vegetation. Typically the lowlands and stream courses are covered with dense jungle vegetation, and the slopes and higher hills are covered with grasses and brush. The vegetation of the "low" coral atolls and islands is, by comparison, much less dense. Many shorelines are covered with scant grasses and shrubs and the interior in many places is dominated by coconut, betel palms, breadfruit, papaya, and pandanus. References to papers dealing with plants in the islands of the Pacific may be obtained in Merrill (1945), who (1945:207) writes, "Botanically, the low islands are very uninteresting and monotonous. The flora of one is usually quite the same as that of another, although these islands and islets may be separated by many hundred and in some cases several thousand miles. The native vegetation may be scanty or reasonably well developed, depending on the size of the island, the quality of its soil, and whether or not it is permanently inhabitated." Of the vegetation on the "high" islands of the Pacific area, Merrill (1945:209) comments that the vegetation "is well developed, particularly within the forested areas, but for these high islands within the Pacific basin as a whole, the number of endemic genera is relatively small and most of them have definite relationships with those of Malaysia." Concerning the "high" islands of Micronesia, Merrill (1945:210) remarks that these islands are smaller and more isolated than some of the others in Oceania and have fewer individual species "as compared with what one finds on islands of a similar size located within limits of the Malay Archipelago. Thus with all of the islands under Japanese mandate, and including a number of high, but at the same time relatively small islands, less than 1,300 different species are known, of which 230 manifestly represent purposely or accidentally introduced ones. This relatively small flora includes representatives of approximately 620 genera in 192 families.... Specific endemism is relatively high, for approximately 460 species are confined to the islands within the area under consideration. The generic endemism is very low; about seven endemic genera only are involved for the whole group." The figures for endemism of plants are comparable to those for birds. Of endemic birds there are 5 genera, 35 species, and 73 subspecies. The total number of species of birds known from Micronesia is only 206 as compared with 1,300 plants. Yamada (1926:966) writes that the number of species of plants that Micronesia has in common with Japan may be due to the influence of the "Japan Stream." Many land birds in Micronesia depend directly on the plant life for food. Possibly the soil (including its mineral content), upon which the plants themselves depend for development of fruits and other edible parts, may offer a limiting factor to the distribution of birds in Micronesia. Possibly the fruits and other edible parts of plants do not provide the necessary amounts of proteins, carbohydrates, minerals, vitamins, and other essential food items for species of plant-eating birds, which have not become established in Micronesia. Possibly some species of plant-eating birds have reached Micronesia but have failed to establish themselves because of some dietary deficiency caused by poverty of the soils on which the plants grow. If a comparison were made of soils and of the food values of fruits of plants in both the islands of Micronesia and similarly sized islands in the Malay region, a difference might be revealed which would partly explain why some plant-eating birds have not become established in Micronesia. GAZETTEER OF ISLANDS OF MICRONESIA In the following list the name in current usage for each island or island group in Micronesia is followed by other names which have been used. There is no attempt made to list the names of the small islands of each atoll or those of the myriads of small islets that lie offshore from the larger volcanic islands. Collections have not been made on most of the smaller islands. For the few on which a species has been collected, the islet is adequately described in the account of the particular species concerned. The reader may refer to Brigham (1900) for a listing of the islands of the Pacific Ocean. Most of the islands included in the following list may be located on the map of Micronesia as shown in figures 2, 3, 4, and 5. These listings follow in order of arrangement those in the Civil Affairs Handbooks, published by the United States Navy Department (1943, 1944a, 1944b, and 1944c). MARIANA ISLANDS The Mariana Islands (also called Ladrone, Marianne, Marian) consist of 14 single islands and one group of three islands. The Marianas are all "high" or volcanic islands. The islands, shown in figure 2, are listed as follows: _Agrihan_ (also called Agrigan, Arijan, Francisco Xavier, Granger, Gregus, Grigan, San Francisco Javier). _Agiguan_ (also called Agaigan, Agiigan, Agiguan, Agigwan, Aguigan, Aguijan, Aguyan, Guigan, Saint Ange, Santa Angel). _Alamagan_ (also called Almagan, Aramagan, Concepcion). _Anatahan_ (also called Anatagen, Anatajen, Anataxan, San Joaquin). _Asuncion_ (also called Asonson, Assongsong, Assumption). _Guam_ (also called Guaham, Guahan). _Guguan_ (also called Guguwan, Guugwan, Piedras, San Felipe, St. Philippe). _Maug_ (also called Mang, Mangs, Mauga, Monjas, Mougu, Saint Laurent, San Lorenzo, Tunas). _Medinilla_ (also called Bade, Bird, Farallon de Medinilla, Rocher). _Pagan_ (also called Pagon, Paygan, St. Ignace, San Ignacio). _Rota_ (also called Luta, St. Anne, Santa Ana, Sarpan, Satpana, Suta, Zarpane). _Saipan_ (also called (Saepan, St. Joseph, San José, Saypan, Siepan, Serpan, Seypan). _Sarigan_ (also called St. Charles, San Carlos, Sariguan, Sarigwan). _Tinian_ (also called Bona Vista, Buenavista, Temean, Tenian, Tiniamou). _Uracas_ (also called Guy Rock, Farallon de Pájaros, Pájaros, Urakasu). [Illustration: FIG. 2. The Mariana Islands.] PALAU ISLANDS [Illustration: FIG. 3. The Palau Islands.] The Palau Islands (also called Arrecifos, Palaos, Paleu, Pally, Paloc, Pannog, Parao, Pelew) consist of 8 large islands, 18 smaller islands, and a large number of minute islets, all enclosed in a single reef system. The northern islands (Babelthuap and Koror) are of volcanic origin; the southern islands (Peleliu and others) are of coralline formation. Angaur, to the south of Peleliu, may be included with the Palau Archipelago. From the standpoint of the avian zoogeography, the coral islands or atolls of Kayangel, Merir, Pulo Anna, Sonsorol, and Tobi are also included. The principal islands, shown in figure 3, are listed below: _Arakabesan_ (also called Ngarekobasang). _Aurapushekaru_ (also called Aburashokoru, Auluptagel, Oluksakel, Oropu-shakaru). _Babelthuap_ (also called Babeldzuap, Babel Taob, Babelthouap, Baberthaob, Baberudaobu, Babldaob). _Eil Malk_ (also called Amototi, Cogeal, Irakong, Makarakaru). _Garakayo_ _Koror_ (also called Coror, Goreor, Kororu). _Malakal_ (also called Amalakell, Malaccan, Marakaru, Nanalake). _Ngabad_ _Ngesebus_ (also called Guadokusu). _Peleliu_ (also called Pelelew, Periryu, Pililer, Peliliu, Uler). _Urukthapel_ (also called Cape, Kuapasungasu, Ngurukdapel, Ulugeang, Uruk-taaburu, Uruktapi). Included with the Palau group because of proximity and relationships of the avifauna are the following: _Angaur_ (also called Angauru, Angyaur, Ngaur, Ngeour, N'Yaur). _Kayangel_ (also called Kadjangle, Kajanguru, Kazyanguru, Kianguel, Kreiangel, Moore, Ngajangel, Ngeiangel). _Merir_ (also called Marir, Meliel, Meriel, Meriru, Pulo Marier, Warren Hastings). _Pulo Anna_ (also called Anna, Bul, Bur, Current, Paola, Pul, Puru, Wull). _Sonsorol_ (also called St. Andrew, San Andreas, Sonesor, Songosor, Sonseron, Sonsol, Sonsoru, Tschontil). _Tobi_ (also called Codopuei, Johnstone, Kadogubi, Lectobis, Lord North, Nevil, Togobei, Tokobei). CAROLINE ISLANDS The Caroline Islands consist of 41 island clusters or isolated islands (exclusive of submerged coral reefs). These are of coral formation. They are atolls or single islands except for Yap, which is of sedimentary rock, and Kusaie, Ponapé, and Truk, which are of volcanic rock. The principal islands are shown in figure 4 and are listed as follows: _East Fayu_ (also called Fajo, Faliao, Lutké, Rukutee). _Eauripik_ (also called Aurepik, Eourpyg, Iuripik, Kama, Low, Yorupikku, Yuripik). _Fais_ (also called Astrolabe, Feis, Feys, Fuhaesu, Huhaesu, Tromelin, Woaje). _Faraulep_ (also called Faraulip, Faroilap, Fattoilap, Foroilap, Furaarappu, Gardner, Huraarappu). _Ifalik_ (also called Evalook, Faloc, Furukku, Hurukku, Ifalouk, Ifelug, Two Sisters, Wilson). _Kapingamarangi_ (also called Bakiramarang, Constantine, Greenwich, Guriinitchi, Kabeneylon, Kapenmailang, Makarama, Pikiram, Tenuv). _Kusaie_ (also called Arao, Armstrong, Experiment, Hope, Kusai, Kuschai, Kushai, Kuthiu, Oualan, Quollen, Strong, Teyoa, Ualan, Walang). _Lamotrek_ (also called Lamorsu, Lamureck, Lamutrik, Low, Namotik, Namotikku, Manochikku, Namurrek, Swede). _Lukunor_ (also called Lemarafat, Lougoullos, Lougounor, Luganor, Lugunor, Lugunoz, Mortlock, Namonefeng, Rukunoru, Youngwilliam). _Namonuito_ (also called Anonyma, Baxos de San Bartolomeo, Bunkey, Las Hermanas, Livingstone, Lost Jardines, Lutké, Namenwita, Olol, Omun, Onon, Ororu, Remp, Ueito, Ulul). _Ngulu_ (also called Angegul, Anolul, Goulou, Kurru, Lamoliao, Lamoliork, Lamuliur, Lamuniur, Matelotas, Ngilu, Ngoli, Ngolog, Spencer Keys, Ulu). _Nukuoro_ (also called Dunkin, Matakema, Menteverde, Nugoru, Nukor, Nukuor). _Pikelot_ (also called Bigali, Biguela, Coquille, Lydia, Pigela, Pigerotto, Pigouelao, Pik, Pyghella). _Pingelap_ (also called Macaskill, Musgrave, Pelelap, Piigerappu, Punlap, Sailrocks, Tucks Reef). _Ponapé_ (also called Ascension, Bonabee, Bonybay, Faloupet, Faounoupei, Funopet, Niponpei, Painipete, Ponapi, Piunipet, Puynipet, Quirosa, Seniavin, William IV). Ponapé is the largest island of the Senyavin Islands. _Truk_ (also called Djuk, Hogoleu, Hogolu, Hoguleu, Lugulus, Ola, Rough, Ruck, Ruk, Torakku, Tuck, Ugulut). The Truk group includes approximately 100 islands. _Ulithi_ (also called Mackenzie, Mogmog, Mogumogu, Mokomok, Ouluthy, Uluthi, Uluti, Urushi). _West Fayu_ (also called Faiyao, Fajahu, Faliau, Huiyao, West Faiu). _Woleai_ (also called Anagai, Mereyon, Oleai, Ouleyai, Thirteen Islands, Uala, Ulea, Uola, Ulie, Wolea). _Yap_ (also called Eap, Guap, Heap, Jap, Ouap, Uap, Wuap, Yappu). [Illustration: FIG. 4. The Caroline Islands.] MARSHALL ISLANDS The Marshall Islands consist of 29 atolls and 5 coral islands without lagoons arranged in two chains, the Ralik and the Radak chains, which extend in a northwesterly to southeasterly direction. No volcanic rocks are exposed in these islands. The principal islands shown in figure 5 are as follows: _Ailuk_ (also called Ailu, Fisher, Krusenstern, Tindall, Watts). _Arhno_ (also called Arno, Aruno, Auru). _Bikar_ _Bikini_ _Ebon_ (also called Boston Atoll). _Elmore_ (also called Ailinglap, Ailinglapalap, Iringlob). _Eniwetok_ _Jaluit_ (also called Bonham, Taluit). _Kwajalein_ _Likieb_ (also called Likiep). _Majuro_ (also called Arrowsmith, Mezyuro). _Mejit_ _Maloelab_ _Mille_ (also called Mulgrave). _Namorik_ _Namu_ (also called Musquillo, Namo). _Rongelap_ _Wotje_ (also called Romanzov, Wotze, Wozzie). [Illustration: FIG. 5. The Marshall Islands.] ORNITHOLOGICAL EXPLORATION IN MICRONESIA The Micronesian islands were first explored and colonized by a a people who came from Malaysia. It is thought that these people spread into the Palau, Caroline, Mariana, Marshall, and Gilbert islands as a single wave of migration. Following this occupation, the people apparently underwent a normal process of cultural evolution and differentiation. Remains of stone walls, dikes, fences, pillars, graves, and other structures which may be found today at various islands in Micronesia were constructed by the ancestors of the islanders of the present day. It is thought by archeologists that the Polynesians moved eastward into the Pacific islands by way of Micronesia. The date of this wave of migration is thought to have been approximately 1200 A. D. What kinds of birds may have been exterminated by this earliest of human colonization cannot be ascertained. Edible species, particularly megapodes, rails, and pigeons, probably were eliminated or reduced in numbers, as is indicated by later discussions. The first Europeans to visit Micronesia, as far as the present writer can ascertain, left no accounts of the birds significant for the study here reported upon. Magellan, on his trip around the world, was the leader of the first party of Europeans who touched at Guam; this was on March 6, 1521. Rota, Agiguan, Saipan, and Tinian were also discovered by this Portuguese sea captain in the service of the king of Spain. Eltano, one of Magellan's lieutenants, revisited the Pacific and stopped at Rota in 1524. After the voyage of Magellan, other seafarers, mostly in the service of Spain, visited the Micronesian islands. The Caroline Islands were apparently first observed by the Portuguese captain, Diego de Rocha, in 1526. Loyasa and Saavdera, both Spaniards, visited the Marshall Islands in 1526 and 1529, respectively. One of the first travelers to record observations on the bird life was Henry Wilson. Wilson was captain of the schooner "Antelope" which became grounded on a reef in the Palau Islands in August, 1783. He lived with the islanders while the ship was being repaired and kept a journal of his observations (Wilson, 1788). Wilson also visited several other islands in western Micronesia. Adelbert von Chamisso (1821), as naturalist with the Russian expedition in the ship "Rurick," made observations of the animal life in Micronesia in 1817 and 1818. Under the command of Otto von Kotzebue, this Russian expedition made the first detailed exploration of the Marshall Islands; visits were made also to Guam and Rota and to Yap, Fais, Ulithi, Palau, and other island groups in western Micronesia. Freycinet's famous expedition in the ships "Uranie" and "Physicienne," visited Guam, Rota, and Tinian in 1819. Quoy and Gaimard, the naturalists of the expedition, obtained birds, which were among the first to be described from Micronesia. These two naturalists revisited the Marianas in 1829 on board the ship "Astrolabe." Scientific results of both of these expeditions (Quoy and Gaimard, 1824-'26 and 1830-'35) include texts and plates dealing with the birds obtained. The French expedition in the corvette "La Coquille" visited Kusaie in June, 1824. Lesson (1829) wrote the zoology of this trip. Kittlitz (1836) of the expedition which sailed in the corvette "Le Seniavine" commanded by Lutké obtained birds at Kusaie in December and January, 1827-'28, at Guam in March, 1828, and at Lukunor and other islands of the Carolines. At Kusaie, Kittlitz found a rail (_Aphanolimnas monasa_) and a starling (_Aplonis corvinus_) which have not been obtained since his time. His specimens were deposited in St. Petersburg. He was one of the most competent of the early naturalists; his writings contain accounts of habits as well as descriptions and are accompanied by colored plates. The expedition which sailed on the "Astrolabe" and the "Zélée" in 1827-'40 under the command of Dumont d'Urville visited the Caroline Islands. The naturalists, Hombron and Jacquinot, obtained birds at Truk, including the interesting flycatcher, _Metabolus rugensis_, which they described (1841). The "Novara," in the course of its voyage around the world (1857-'59) visited the Caroline Islands in 1858. Birds were recorded from Ponapé, Lukunor and other islands by Pelzeln in his account of the birds of the expedition (1865). In the years following the middle of the Nineteenth Century, Godeffroy and Sons, of Hamburg, opened branches of its trading firm in Micronesia. Representatives of the company including Heinsohn and Peters, who were ship captains, obtained collections of birds at Palau and Yap. These were deposited in the Godeffroy Museum at Hamburg and reported on by Hartlaub and Finsch (Hartlaub, 1868; Hartlaub and Finsch, 1868a and 1872). Tetens became representative of Godeffroy and Sons at Yap in 1869 and obtained birds. Perhaps the most famous collector in this period was Johann Kubary. He went to Ponapé at the age of nineteen and traveled in Micronesia for many years for Godeffroy and Sons. He obtained birds at many of the islands of the Carolines, spending fourteen months at Truk. In 1873, one of his collections of some 200 birds was lost in a shipwreck. Hartlaub and Finsch, (Hartlaub and Finsch, 1872; Finsch, 1876a) described much of his material; Nehrkorn (1879) reported on nests and eggs which he obtained. Hartlaub and Finsch (1868b) also reported on birds obtained at Palau by Doctor Semper, which were deposited in the museum at Altona. Otto Finsch (1880b, 1880d, 1881b, 1881c) traveled in Micronesia about 1880, observing birds in the eastern Carolines and in the Marshalls. One of the largest collections from Micronesia was made by Alfred Marche in the Marianas. He arrived there on April 22, 1887, and stayed until May, 1889. He obtained approximately 732 specimens of birds, nests, and eggs at Guam, Rota, Tinian, Saipan, Pagan, and Alamagan, which were deposited in the Paris Museum and reported on by Oustalet (1895-'96). Shortly after Marche's visit, Japanese collectors in the hire of Alan Owston, a professional collector of Yokahama, obtained birds in the Marianas and at Truk in the years 1894-'97. These went to the Rothschild collection at Tring and were reported on by Hartert in 1898 and 1900. At the turn of the Twentieth Century, several ornithologists were visiting Micronesia. Alvin Seale (1901) obtained a collection of birds at Guam in the summer of 1900 which was deposited in the Bernice P. Bishop Museum in Honolulu. The U. S. Fish Commission steamer "Albatross" visited Micronesia from August, 1899, to March, 1900; birds obtained by the expedition were reported on by Townsend and Wetmore (1919). Paul Schnee (1901) spent approximately one year, 1899-1900, at Jaluit in the Marshalls and obtained records of birds. In 1899, Brandeis, on board the German ship "Kaiserland" visited many of the islands in the Marshalls and recorded birds. William Safford (1905) resided at Guam in the early part of this century and reported on the bird life in the course of his studies of the botany and native life. Bartsch (Mearns, 1909) also obtained a small collection of birds at Guam, this is in the United States National Museum. In the first World War when the Japanese gained a mandated control over the islands of Micronesia, the Japanese ornithologists promptly visited the area, obtained collections, and published works concerning the birds. In 1922, Momiyama and Kuroda prepared a list of the birds of Micronesia. The work was published under the auspices of the Ornithological Society of Japan. Subsequent editions appeared in 1932 and 1942. The Whitney South Sea Expedition of the American Museum of Natural History visited Micronesia from October, 1930, to December, 1931, with William F. Coultas as collector. Although experiencing some difficulty and being restricted somewhat in his travels by the Japanese officials, he managed to obtain collections at Ponapé (October 26, 1930, to January 1, 1931), Kusaie (January 15 to June 11, 1931), Guam (June 24 to August 30, 1931), Saipan and Tinian (September 1 to 26, 1931), and Palau (October 2 to December, 1931). Many of the species which he obtained are represented by large series of fine skins. Only part of his collections have been reported on by Mayr and his associates. Other than the work of Coultas and that of the Japanese, there was little ornithological work done in the period between the two world wars, probably, at least in part, because of the "iron curtain," which Japan had thrown about her mandate. Bryan (1936) did visit Guam in the middle 1930's and published an account of the birds in the newspaper, Guam Recorder. When the Micronesian islands were taken by the American forces in 1944, personnel attached to various units made observations on the bird life. The first reports, published or unpublished, were from the Marshalls, which were taken at the beginning of the campaign. Gleise, Genelly, Wallace, and others made contributions. In the Marianas considerably more observing and collecting were done by service personnel including Marshall, Stott, Borror, Strophlet, Buss, Watson, Arvey, Downs, and others. Marshall (1949) obtained also a collection of birds in the Palaus in 1945. The Laboratory of Mammalogy, United States Naval Medical Research No. 2, to which I was attached, collected at Guam (January to October, 1945), at Rota (October 17 to November 2, 1945), at Ulithi (August 11 to 23, 1945), at Palau (August 24 to September 24, 1945), and at Truk (November 24 to December 18, 1945). Following the end of the war, Harvey I. Fisher visited Micronesia and obtained a collection of birds at Yap, which is to be reported on in the near future. Larry P. Richards obtained 33 birds at Ponapé and 4 at Truk in the period from August 28, 1947, to February 10, 1948. Descriptions of birds in Micronesia began with the naming of _Halcyon c. cinnamomina_ in 1821; the most recent description is that of _Rhipidura rufifrons mariae_ in 1946. In all, 131 descriptions have designated type localities in Micronesia. Table 1 lists the dates (on the basis of ten-year intervals) when names of birds (synonyms or otherwise) were proposed. In the period from 1821 to 1860, twenty-five birds were made known to science by the earliest workers, including Kittlitz, Lesson, Bonaparte, and Pelzeln. In the period from 1861 to 1880, thirty-four birds were newly named, mostly by Hartlaub and Finsch, from the collections which the Godeffroy Museum obtained through the efforts of Kubary, Tetens, Peters, and Heinsohn. Nineteen original descriptions were published from 1881 to 1900, principally by Oustalet and Hartert, who studied the material of Marche and Owston, respectively. From 1901 to 1910, only four birds were described, but from 1911 to 1940, forty-seven descriptions were published, mostly by the Japanese following World War I. From 1931 to 1940, the number of known birds was increased by the efforts of Mayr, who studied the material of the Whitney South Sea Expedition. From 1941 to date only two original descriptions have appeared--only one was postwar. Except for possible undescribed subspecies in the northern Marianas, I think that the heyday of the taxonomist in ornithology in Micronesia is over. The field of avian ecology in Micronesia has barely been scratched. TABLE 1. COMPILATION OF THE DATES (ON THE BASIS OF TEN-YEAR INTERVALS) WHEN ORIGINAL DESCRIPTIONS OF BIRDS OF MICRONESIA APPEARED. ============+==============+============+============== | No. of | | No. of YEARS | descriptions | YEARS | descriptions ------------+--------------+------------+-------------- 1821-1830 | 8 | 1881-1890 | 9 1831-1840 | 8 | 1891-1900 | 10 1841-1850 | 4 | 1901-1910 | 4 1851-1860 | 5 | 1911-1920 | 10 1861-1870 | 11 | 1921-1930 | 15 1871-1880 | 23 | 1931-1940 | 22 | 1941-1949 | 2 ------------+--------------+------------+-------------- CHECK-LIST OF THE BIRDS OF MICRONESIA The 206 kinds of birds of 150 full species known to occur in Micronesia belong to 91 genera of 37 families of 13 orders. In the following list, nonresident birds are marked with an *; birds introduced by man are marked with a [+]. Class AVES--birds PAGE Order PROCELLARIIFORMES--albatrosses, petrels, and allies Family Diomedeidae--albatrosses _Diomedia nigripes_ Audubon* Black-footed Albatross 63 Family Procellariidae--petrels and shearwaters _Puffinus pacificus chlororhynchus_ Lesson Wedge-tailed Shearwater 64 _Puffinus pacificus cuneatus_ Salvin Wedge-tailed Shearwater 65 _Puffinus tenuirostris_ (Temminck)* Short tailed Shearwater 66 _Puffinus nativitatus_ Streets Christmas Shearwater 66 _Puffinus lherminieri dichrous_ Finsch and Hartlaub Dusky Shearwater 66 _Pterodroma rostrata rostrata_ (Peale)* Tahiti Petrel 69 _Pterodroma hypoleuca hypoleuca_ Salvin Stout-billed Gadfly Petrel 70 Order PELECANIFORMES--tropic birds, boobies, cormorants, frigate birds and allies Family Phaëthontidae--tropic birds _Phaëthon aethereus mesonauta_ Peters* Red-billed Tropic Bird 70 _Phaëthon rubricauda rothschildi_ (Mathews) Red-tailed Tropic Bird 71 _Phaëthon lepturus dorotheae_ Mathews White-tailed Tropic Bird 72 Family Sulidae--boobies and gannets _Sula dactylatra personata_ Gould Masked Booby 75 _Sula sula rubripes_ Gould Red-footed Booby 75 _Sula leucogaster plotus_ (Forster) Brown Booby 76 Family Phalacrocoracidae--cormorants _Phalacrocorax melanoleucus melanoleucus_ (Vieillot) Little Pied Cormorant 78 Family Fregatidae--frigate birds or man-o'-war birds _Fregata minor minor_ (Gmelin)* Pacific Man-o'-War 79 _Fregata ariel ariel_ (Gray) Least Man-o'-War 80 Order CICONIIFORMES--herons, storks, and allies Family Ardeidae--herons and bitterns _Butorides striatus amurensis_ Schrenck* Amur Green Heron 81 _Bubulcus ibis coromandus_ (Boddaert)* Cattle Egret 82 _Egretta intermedia intermedia_ (Wagler)* Plumed Egret 82 _Demigretta sacra sacra_ (Gmelin) Reef Heron 84 _Nycticorax nycticorax nycticorax_ (Linnaeus)* Black-crowned Night Heron 87 _Nycticorax caledonicus pelewensis_ Mathew Rufous Night Heron 87 _Gorsachius goisagi_ (Temminck)* Japanese Bittern 89 _Gorsachius melanolophus melanolophus_ (Raffles)* Malay Bittern 90 _Ixobrychus sinensis_ (Gmelin) Chinese Least Bittern 93 _Ixobrychus eurhythmus_ (Swinhoe)* Shrenck's Least Bittern 93 _Dupetor flavicollis flavicollis_ (Latham)* Black Bittern 94 Order ANSERIFORMES--ducks, geese, swans, and allies Family Anatidae--ducks, geese, and swans _Anas oustaleti_ Salvadori Marianas Mallard 94 _Anas poecilorhyncha pelewensis_ Hartlaub and Finsch Australian Gray Duck 98 _Anas querquedula_ Linnaeus* Garganey Teal 100 _Anas crecca crecca_ Linnaeus* European Teal 100 _Anas crecca carolinensis_ Gmelin* Green-winged Teal 100 _Anas acuta acuta_ Linnaeus* Pintail 101 _Anas acuta tzitzihoa_ Vieillot* Pintail 101 _Anas penelope_ Linnaeus* Widgeon 102 _Anas clypeata_ Linnaeus* Shoveller 102 _Aythya fuligula_ (Linnaeus)* Tufted Duck 103 _Aythya valisineria_ (Wilson)* Canvas-back 103 Order FALCONIFORMES--vultures, hawks, falcons Family Accipitridae--hawks, harriers, and allies _Accipiter soloënsis_ (Horsfield)* Chinese Goshawk 104 _Accipiter virgatus gularis_ (Temminck and Schlegel)* Asiatic Sparrow Hawk 104 _Pandion haliaetus melvillensis_ Mathews Osprey 105 Family Falconidae--falcons and caracaras _Falco peregrinus japonensis_ Gmelin* Peregrine Falcon 105 Order GALLIFORMES--megapodes, pheasants, and allies Family Megapodidae--megapodes _Megapodius lapérouse senex_ Hartlaub Micronesian Megapode 106 _Megapodius lapérouse lapérouse_ Gaimard Micronesian Megapode 109 Family Phasianidae--quails, pheasants, and allies _Coturnix chinensis lineata_ (Scopoli)[+] Painted Quail 113 _Gallus gallus_ (Linnaeus)[+] Red Jungle Fowl 114 _Phasianus colchicus_ Linnaeus[+] Ring-necked Pheasant 115 Order GRUIFORMES--cranes, rails, and allies Family Rallidae--rails, gallinules, and coots _Rallus philippensis pelewensis_ (Mayr) Banded Rail 116 _Rallus owstoni_ (Rothschild) Guam Rail 118 _Rallina fasciata_ (Raffles)* Malay Banded Crake 120 _Rallina eurizonoïdes eurizonoïdes_ (Lafresnaye)* Philippine Banded Crake 121 _Aphanolimnas monasa_ (Kittlitz) Kusaie Black Rail 121 _Poliolimnas cinereus micronesiae_ Hachisuka White-browed Rail 123 _Gallinula chloropus_ subsp. near _orientalis_ Horsfield Gallinule 126 _Gallinula chloropus guami_ Hartert Gallinule 127 _Porphyrio porphyrio pelewensis_ Hartlaub and Finsch Purple Swamphen 129 _Fulica atra atra_ Linnaeus* Common Coot 131 Order CHARADRIIFORMES--shorebirds, gulls, and auks Family Charadriidae--plovers, turnstones, and allies _Squatarola squatarola_ (Linnaeus)* Black-bellied Plover 131 _Pluvialis dominica fulva_ (Gmelin)* Pacific Golden Plover 132 _Charadrius hiaticula semipalmatus_ Bonaparte* Semipalmated Plover 134 _Charadrius dubius curonicus_ Gmelin* Ring-necked Plover 135 _Charadrius alexandrinus nihonensis_ Deignan* Kentish Plover 135 _Charadrius mongolus stegmanni_ Stresemann* Mongolian Dotteral 135 _Charadrius leschenaultii_ Lesson* Large Sand Dotteral 137 Family Scolopacidae--snipe, sandpipers, and allies _Numenius phaeopus variegatus_ (Scopoli)* Whimbrel 137 _Numenius tahitiensis_ (Gmelin)* Bristle-thighed Curlew 139 _Numenius madagascariensis_ (Linnaeus)* Long-billed Curlew 140 _Limosa lapponica baueri_ Naumann* Pacific Godwit 140 _Tringa nebularia_ (Gunnerus)* Greenshawk 141 _Tringa melanoleuca_ (Gmelin)* Greater Yellow-legs 142 _Tringa glareola_ Linnaeus* Wood Sandpiper 142 _Actitus hypoleucos_ Linnaeus* Common Sandpiper 143 _Heteroscelus brevipes_ (Vieillot)* Gray-tailed Tattler 144 _Heteroscelus incanus_ (Gmelin)* Amer. Wandering Tattler 145 _Arenaria interpres interpres_ (Linnaeus)* Turnstone 147 _Gallinago megala_ Swinhoe* Marsh Snipe 149 _Gallinago gallinago gallinago_ (Linnaeus)* Common Snipe 150 _Crocethia alba_ (Pallas)* Sanderling 150 _Calidris tenuirostris_ (Horsfield)* Asiatic Knot 151 _Erolia minuta ruficollis_ (Pallas)* Little Stint 151 _Erolia subminuta_ (Middendorff)* Least Sandpiper 152 _Erolia melanotos_ (Vieillot)* Pectoral Sandpiper 152 _Erolia acuminata_ (Horsfield)* Sharp-tailed Sandpiper 152 _Erolia ferruginea_ (Pontoppidan)* Curlew Sandpiper 153 _Limicola falcinellus sibirica_ Dresser* Broad-billed Sandpiper 154 Family Phalaropidae--phalaropes _Phalaropus lobatus_ (Linnaeus)* Northern Phalarope 154 Family Laridae--gulls and terns _Larus argentatus vegae_ Palmén* Herring Gull 154 _Chlidonias leucopterus_ (Temminck)* White-winged Black Tern 155 _Sterna hirundo longipennis_ Nordmann* Black-billed Com. Tern 155 _Sterna sumatrana sumatrana_ Raffles Black-naped Tern 156 _Sterna lunata_ Peale Spectacled Tern 160 _Sterna anaetheta anaetheta_ Scopoli Bridled Tern 160 _Sterna fuscata oahuensis_ Bloxham Sooty Tern 161 _Sterna albifrons sinensis_ Gmelin* Least Tern 161 _Thalasseus bergii pelecanoides_ (King) Crested Tern 162 _Procelsterna cerulea saxatilis_ W. E. Fisher* Blue-gray Tern 164 _Anoüs stolidus pileatus_ (Scopoli) Common Noddy 165 _Anoüs tenuirostris marcusi_ (Bryan) White-capped Noddy 170 _Gygis alba candida_ (Gmelin) White Tern 174 _Gygis alba pacifica_ (Lesson) White Tern 180 Order COLUMBIFORMES--pigeons, doves, and allies Family Columbidae--pigeons and doves _Columba livia_ Gmelin[+] Blue Rock Pigeon 182 _Ptilinopus porphyraceus ponapensis_ (Finsch) Crimson-crw'd Fruit Dove 182 _Ptilinopus porphyraceus hernsheimi_ (Finsch) Crimson-crw'd Fruit Dove 184 _Ptilinopus porphyraceus pelewensis_ Hartlaub and Finsch Crimson-crw'd Fruit Dove 185 _Ptilinopus roseicapillus_ (Lesson) Marianas Fruit Dove 186 _Ducula oceanica monacha_ (Momiyama) Micronesian Pigeon 190 _Ducula oceanica teraokai_ (Momiyama) Micronesian Pigeon 193 _Ducula oceanica townsendi_ (Wetmore) Micronesian Pigeon 194 _Ducula oceanica oceanica_ (Lesson and Garnot) Micronesian Pigeon 195 _Ducula oceanica ratakensis_ (Takatsukasa and Yamashina) Micronesian Pigeon 197 _Streptopelia bitorquata dusumieri_ (Temminck)[+] Philippine Turtle Dove 198 _Gallicolumba canifrons_ (Hartlaub and Finsch) Palau Ground Dove 201 _Gallicolumba xanthonura xanthonura_ (Temminck) White-thrt'd Ground Dove 203 _Gallicolumba xanthonura kubaryi_ (Finsch) White-thrt'd Ground Dove 207 _Caloenas nicobarica pelewensis_ Finsch Nicobar Pigeon 209 Order PSITTACIFORMES--lories and parrots Family Psittacidae--lories, parrots, and allies _Trichoglossus rubiginosus_ (Bonaparte) Ponapé Lory 211 Order CUCULIFORMES--cuckoos, plantain-eaters Family Cuculidae--cuckoos, anis, and allies _Cuculus canorus telephonus_ Heine* Common Cuckoo 213 _Cuculus saturatus horsfieldi_ Moore* Oriental Cuckoo 214 _Eudynamis taitensis_ (Sparrman)* Long-tailed New Zealand Cuckoo 214 Order STRIGIFORMES--owls Family Strigidae--owls _Otus podarginus_ (Hartlaub and Finsch) Palau Scops Owl 215 _Asio flammeus flammeus_ (Pontoppidan)* Short-eared Owl 217 _Asio flammeus ponapensis_ Mayr Short-eared Owl 218 Order CAPRIMULGIFORMES--goatsuckers and allies Family Caprimulgidae--goatsuckers _Caprimulgus indicus jotaka_ Temminck and Schlegel* Jungle Nightjar 219 _Caprimulgus indicus phalaena_ Hartlaub and Finsch Jungle Nightjar 219 Order APODIFORMES--swifts and hummingbirds Family Apodidae--swifts _Collocalia inexpectata pelewensis_ Mayr Edible Nest Swiftlet 221 _Collocalia inexpectata bartschi_ Mearns Edible Nest Swiftlet 222 _Collocalia inquieta inquieta_ (Kittlitz) Carolines Swiftlet 224 _Collocalia inquieta rukensis_ Kuroda Carolines Swiftlet 225 _Collocalia inquieta ponapensis_ Mayr Carolines Swiftlet 226 Order CORACIIFORMES--kingfishers, rollers, and allies Family Alcedinidae--kingfishers _Halcyon cinnamomina cinnamomina_ Swainson Micronesian Kingfisher 227 _Halcyon cinnamomina pelewensis_ Wiglesworth Micronesian Kingfisher 229 _Halcyon cinnamomina reichenbachii_ (Hartlaub) Micronesian Kingfisher 230 _Halcyon chloris teraokai_ Kuroda White-collared Kingfisher 233 _Halcyon chloris orii_ Takatsukasa and Yamashina White-collared Kingfisher 235 _Halcyon chloris albicilla_ (Dumont) White-collared Kingfisher 235 _Halcyon chloris owstoni_ Rothschild White-collared Kingfisher 237 Family Coraciidae--rollers _Eurystomus orientalis connectens_ Stresemann* Dollar Bird 238 Order PASSERIFORMES--perching birds Family Hirundinidae--swallows _Hirundo rustica gutteralis_ Scopoli* Eastern Barn Swallow 239 Family Campephagidae--cuckoo-shrikes _Edolisoma tenuirostre monachum_ (Hartlaub and Finsch) Cicada Bird 239 _Edolisoma tenuirostre nesiotis_ (Hartlaub and Finsch) Cicada Bird 241 _Edolisoma tenuirostre insperatum_ (Finch) Cicada Bird 242 Family Dicruridae--drongos _Dicrurus macrocercus harterti_ S. Baker[+] Black Drongo 244 Family Corvidae--crows, magpies, and jays _Corvus kubaryi_ Reichenow Marianas Crow 244 Family Turdidae--thrushes _Luscinia calliope calliope_ (Pallas)* Siberian Rubythroat 248 _Monticola solitaria philippensis_ (Müller)* Chinese Blue Rock Thrush 248 _Turdus obscurus obscurus_ Gmelin* Dusky Thrush 248 Family Sylviidae--Old World warblers _Psamathia annae_ Hartlaub and Finsch Palau Bush-warbler 249 _Acrocephalus luscinia luscinia_ (Quoy and Gaimard) Nightingale Reed-warbler 251 _Acrocephalus luscinia syrinx_ (Kittlitz) Nightingale Reed-warbler 254 _Acrocephalus luscinia yamashinae_ (Takatsukasa) Nightingale Reed-warbler 256 _Acrocephalus luscinia nijoi_ (Yamashina) Nightingale Reed-warbler 257 Family Muscicapidae--Old World flycatchers _Rhipidura rufifrons uraniae_ Oustalet Rufous-fronted Fantail 261 _Rhipidura rufifrons saipanensis_ Hartert Rufous-fronted Fantail 262 _Rhipidura rufifrons mariae_ R. H. Baker Rufous-fronted Fantail 263 _Rhipidura rufifrons versicolor_ Hartlaub and Finsch Rufous-fronted Fantail 264 _Rhipidura rufifrons kubaryi_ Finsch Rufous-fronted Fantail 265 _Rhipidura lepida_ Hartlaub and Finsch Palau Fantail 266 _Metabolus rugensis_ (Hombron and Jacquinot) Truk Monarch 269 _Monarcha godeffroyi_ Hartlaub Yap Monarch 272 _Monarcha takatsukasae_ (Yamashina) Tinian Monarch 274 _Myiagra oceanica erythrops_ Hartlaub and Finch Micronesian Broadbill 275 _Myiagra oceanica freycineti_ Oustalet Micronesian Broadbill 277 _Myiagra oceanica oceanica_ Pucheran Micronesian Broadbill 279 _Myiagra oceanica pluto_ Finsch Micronesian Broadbill 280 _Muscicapa narcissina narcissina_ Temminck* Narcissus Flycatcher 282 _Muscicapa griseisticta_ (Swinhoe)* Chinese Gray-spotted Flycatcher 282 _Colluricincla tenebrosa_ (Hartlaub and Finsch) Palau Morning Bird 282 Family Artamidae--wood-swallows _Artamus leucorhynchus pelewensis_ Finsch White-breasted Wood-swallow 284 Family Sturnidae--starlings _Aplonis opacus opacus_ (Kittlitz) Micronesian Starling 286 _Aplonis opacus ponapensis_ Takatsukasa and Yamashina Micronesian Starling 288 _Aplonis opacus angus_ Momiyama Micronesian Starling 289 _Aplonis opacus kurodai_ Momiyama Micronesian Starling 291 _Aplonis opacus orii_ (Takatsukasa and Yamashina) Micronesian Starling 292 _Aplonis opacus guami_ Momiyama Micronesian Starling 293 _Aplonis opacus aeneus_ (Takatsukasa and Yamashina) Micronesian Starling 297 _Aplonis pelzelni_ Finsch Ponapé Mountain Starling 299 _Aplonis corvinus_ (Kittlitz) Kusaie Mountain Starling 301 _Sturnus philippensis_ (Forster)* Violet-backed Starling 302 _Sturnus cineraceus_ Temminck* Ashy Starling 302 Family Meliphagidae--honey-eaters _Cleptornis marchei_ (Oustalet) Golden Honey-eater 302 _Myzomela cardinalis rubratra_ (Lesson) Cardinal Honey-eater 304 _Myzomela cardinalis dichromata_ Wetmore Cardinal Honey-eater 307 _Myzomela cardinalis major_ Bonaparte Cardinal Honey-eater 307 _Myzomela cardinalis saffordi_ Wetmore Cardinal Honey-eater 309 _Myzomela cardinalis kurodai_ Momiyama Cardinal Honey-eater 312 _Myzomela cardinalis kobayashii_ Momiyama Cardinal Honey-eater 313 Family Zosteropidae--white-eyes _Zosterops conspicillata conspicillata_ (Kittlitz) Bridled White-eye 316 _Zosterops conspicillata saypani_ Dubois Bridled White-eye 318 _Zosterops conspicillata rotensis_ Takatsukasa and Yamashina Bridled White-eye 319 _Zosterops conspicillata semperi_ Hartlaub Bridled White-eye 320 _Zosterops conspicillata owstoni_ Hartert Bridled White-eye 321 _Zosterops conspicillata takatsukasai_ Momiyama Bridled White-eye 322 _Zosterops conspicillata hypolais_ Hartlaub and Finsch Bridled White-eye 323 _Zosterops cinerea cinerea_ (Kittlitz) Micron. Dusky White-eye 326 _Zosterops cinerea ponapensis_ Finsch Micron. Dusky White-eye 327 _Zosterops cinerea finschii_ (Hartlaub) Micron. Dusky White-eye 328 _Rukia palauensis_ (Reichenow) Palau Greater White-eye 330 _Rukia oleaginea_ (Hartlaub and Finsch) Yap Greater White-eye 331 _Rukia ruki_ (Hartert) Truk Greater White-eye 332 _Rukia sanfordi_ (Mayr) Ponapé Greater White-eye 333 Family Ploceidae--weaver-finches _Erythrura trichroa trichroa_ (Kittlitz) Blue-faced Parrot-finch 336 _Erythrura trichroa clara_ Takatsukasa and Yamashina Blue-faced Parrot-finch 337 _Erythrura trichroa pelewensis_ Kuroda Blue-faced Parrot-finch 338 _Lonchura nigerrima minor_ (Yamashina) Black-faced Weaver-finch 339 _Lonchura punctulata cabanisi_ (Sharpe)[+] Phil. Nutmeg Mannikin 340 DISCUSSION OF THE BIRDS OF MICRONESIA Of the 206 kinds of birds found in Micronesia, 30 kinds are classed as sea birds, 29 kinds as migratory shore birds, and 147 kinds are classed as land and fresh-water birds. For purposes of discussion these birds are arranged in these three categories, following the system used by Mayr (1945a). OCEANIC BIRDS Oceanic birds found in Micronesia belong to the following families: Diomedeidae, Procellariidae, Phaëthontidae, Pelecanidae, Fregatidae, and Laridae. Following Wynne-Edwards (1935:240) and Murphy (1936:326), these birds may be grouped as inshore birds (Laridae and others), offshore birds (Pelecanidae, Fregatidae and others), and pelagic birds (Diomedeidae, Procellariidae, Phaëthontidae). As shown in table 2 there are 30 kinds of oceanic birds in Micronesia, 18 kinds that are resident and 12 kinds that are regarded as visitors to the area. Records of nestings are few; field work in the future probably will yield evidence that more kinds of oceanic birds are actually resident in the Micronesian islands. TABLE 2. LIST OF RESIDENT AND NONRESIDENT OCEANIC BIRDS OF MICRONESIA -------------------+----------+------------- Genera | Resident | Nonresident | kinds | kinds -------------------+----------+------------- _Diomedea_ | 0 | 1 _Puffinus_ | 4 | 1 _Pterodroma_ | 1 | 1 _Phaëthon_ | 2 | 1 _Sula_ | 3 | 0 _Fregata_ | 1 | 1 _Larus_ | 0 | 1 _Chlidonias_ | 0 | 1 _Sterna_ | 2 | 4 _Thalasseus_ | 1 | 0 _Procelsterna_ | 0 | 1 _Anoüs_ | 2 | 0 _Gygis_ | 2 | 0 -------------------+----------+------------- INSHORE OCEANIC BIRDS The inshore zone, according to Wynne-Edwards (1935:240), "extends from high-water mark to a maximum of four or five miles out to sea, including islands and reefs within sight of shore." In Micronesia the majority of the Laridae occur in this zone including such residents as _Sterna sumatrana_, _S. anaetheta_, _Thalasseus bergii_, _Anoüs stolidus_, _A. tenuirostris_, _Gygis alba_. These birds, especially _S. anaetheta_, _Thalasseus_, and _Anoüs_, may venture into the offshore zone. Visitors to Micronesia include several terns which probably normally range in the inshore (as well as in offshore) zones, such as _Childonias leucopterus_ and _Sterna hirundo_. These birds feed to a considerable extent inside the outer reefs surrounding the lagoons, coming to shore frequently in small or large groups. _Gygis alba_ probably spends considerable time on shore; stomachs examined contained fish, crustaceans and insects, indicating that they obtain some of their food ashore. OFFSHORE AND PELAGIC OCEANIC BIRDS Wynne-Edwards (1935:241) defines the offshore zone as extending to the continental edge; however, in Micronesia where small islands rise abruptly out of the ocean's depths, there is no useful way to separate the offshore zone from the pelagic zone. Since certain species go farther from the land than others, the two zones may be combined as a single zone extending beyond the sight of land. Birds which frequent this area beyond the inshore zone but may not range extensively at sea include _Fregata_, _Sula_, _Sterna fuscata_, _S. hirundo_, _S. anaetheta_, and others. The Herring Gull (_Larus argentatus_), which has been taken in the northern Marianas, may be classed with this group although it probably ranges widely in the open sea. Birds which spend considerable time at sea and may seldom approach land include _Diomedea nigripes_, the petrels (_Puffinus_ and _Pterodroma_), and possibly the tropic birds (_Phaëthon_). In numbers of individuals the birds inhabiting the inshore zones are relatively more numerous than those preferring the offshore and pelagic zones, although 12 of the 18 resident kinds of oceanic birds apparently prefer the offshore zone, while only 6 kinds appear to be restricted primarily to the inshore areas. FAUNAL COMPONENTS The oceanic birds were probably among the earliest birds to reach the islands of Micronesia. The presence of phosphate deposits on islands (Fais, Angaur), denoting deposition of guano by oceanic birds (possibly boobies, noddies, sooty terns), indicates long time residence by these birds. A person is prone to think that these deposits must have been made by larger concentrations of oceanic birds than are found in these islands today. Whether there were actually more individuals present during the period of deposition of phosphate in the lagoons of these islands is not known, although the elevation of the lagoons (forming the raised islands of Fais and Angaur) with the resulting freshening of the water probably was a great attraction to oceanic birds, especially to those which prefer to drink fresh water. According to Leonard P. Schultz (_in litt._), the abundance of fish in the areas about these Pacific islands has been approximately the same since Pleistocene times, so that there was apparently no greater concentration of fish near these islands to attract large populations of fish-eating sea birds. Probably the time element is of sufficient magnitude to account for such deposition by birds with a population similar to that found there today. The oceanic avifauna of Micronesia contains birds which are apparently from ancestral homes in the Palearctic Region, in the North and Central Pacific, in Polynesia, in Melanesia and Malaysia, and from homes the positions of which are uncertain because of the widespread circumtropical occurrence of the birds. There are no sea birds that are endemic in Micronesia. Oceanic birds whose range is in the Northern Hemisphere (especially Palearctica) reach the northern and western edges of Micronesia as winter visitors. These include _Larus argentatus_, _Chlidonias leucopterus_, and _Sterna hirundo_. Another northern gull, _Larus ridibundus_, has been reported in the Marianas. One bird of the North and Northcentral Pacific, _Diomedea nigripes_, reaches the northern Marianas where it has been taken at Agrihan. It is not unlikely that other birds of the North Pacific reach northern Micronesia as occasional visitors. Species of oceanic birds which are restricted in their distribution to Polynesia and some adjacent islands and which range to Micronesia, either as visitors or residents, include _Puffinus tenuirostris_, _P. nativitatis_, _Pterodroma rostrata_, _P. hypoleuca_, _Sterna lunata_, and _Procelsterna cerulea_. The islands of the vast Pacific basin offer havens for many kinds of oceanic birds. Apparently there has been considerable speciation among sea birds in Polynesia, especially in its marginal areas. Micronesia has received only a small part of this avifauna. Two terns, _Sterna sumatrana_ and _Thalasseus bergii_, have reached Micronesia, either directly or indirectly, each from a dispersion point somewhere in the Melanesian or the Malayan area. These two birds are restricted in their ranges to the western Pacific and the Indian oceans. Many of the species of oceanic birds found in Micronesia have circumtropical ranges. These include _Puffinus pacificus_, _P. lherminieri_, _Phaëthon_, _Sula_, _Fregata_, _Sterna anaethetus_, _S. fuscata_, _Anoüs stolidus_, _A. tenuirostris_, and _Gygis alba_. Some of these kinds range along continental shores as well as in island archipelagoes. Others, like _Gygis alba_, are rarely found along the shores of continents or even at coastal islands. MIGRATORY SHORE BIRDS Twenty-eight species of shore birds of the families Charadriidae and Scolopacidae have been recorded from Micronesia, and one other of the family Phalaropodidae apparently occurs in the area, making a total of 29 kinds. From the entire Southwest Pacific, Mayr (1945a:28-47) lists 31 species and subspecies of shore birds and mentions six other species which may occur there. Thus, of a possible 37 kinds of shore birds in this large area (which includes Micronesia), 29 are present in the islands of Micronesia. For purposes of discussion, shore birds are here placed in one of two groups: regular visitors or uncommon visitors. A regular visitor is one which has been recorded in the literature or in unpublished field accounts as being frequently observed in Micronesia in periods of migration. An uncommon visitor is one which has been infrequently observed in Micronesia. Of the 28 kinds of shore birds recorded from Micronesia, 17 are classed as regular visitors and 11 are classed as uncommon visitors. ORIGINAL HOMES OF THE SHORE BIRDS THAT VISIT MICRONESIA TABLE 3. BREEDING AND WINTERING GROUNDS OF THE SPECIES OF MIGRATORY SHORE BIRDS IN MICRONESIA PART A. Location of breeding grounds ==================+========+================+=========+========== CLASS | Number | Circumpolar[A] | Asiatic | American ------------------+--------+----------------+---------+---------- Regular visitors | 17 | 5 | 10 | 2 Uncommon visitors | 11 | 2 | 8 | 1 +--------+----------------+---------+---------- Totals | 28 | 7 | 18 | 3 ------------------+--------+----------------+---------+---------- PART B. Location of wintering grounds ------------------+--------+---------+---------+----------+--------- CLASS | Number | Circum- | Asiatic | American | Oceanic |tropical| | | | ------------------+--------+---------+---------+----------+--------- Regular visitors | 17 | 2 | 13 | 1 | 1 Uncommon visitors | 11 | 1 | 8 | 2 | 0 +--------+---------+---------+----------+--------- Totals | 28 | 3 | 21 | 3 | 1 ------------------+--------+---------+---------+----------+--------- [A] Denotes birds which breed on both American and Asiatic sides of the Pacific Ocean. The shore birds which are known to visit Micronesia breed in the Northern Hemisphere. Table 3 summarizes the data concerning the breeding and wintering areas of these birds. As shown in part A of table 3, 18 of the 28 species which visit Micronesia come from Asiatic breeding grounds. Seven have circumpolar breeding ranges and three (two are regular visitors) come from American breeding grounds. As shown in part B of table 3, 21 of the 28 waders have their winter ranges on the Asiatic side of the Pacific with eastern extensions to Micronesia and other parts of Oceania. Of the 7 remaining species, the winter ranges of three are circumtropical; the winter range of a fourth is restricted to Oceania; and the winter ranges of the remaining three (two classed as uncommon visitors) are American. Bryan and Greenway (1944:109-115) record 14 species of shore birds from the Hawaiian Islands. One of these, _Himantopus himantopus knudsoni_, is a resident, probably of New World origin, according to Mayr (1943:56). The others, listed in table 7, include three species unknown in Micronesia. One of these, _Phalaropus fulicarus_, apparently winters at sea off the west coast of South America. The other two species (_Charadrius vociferus vociferus_ and _Gallinago delicata_) are classified by Bryan and Greenway as "accidental" and "occasional" visitors from North America. The ten species common to both the Hawaiian Islands and Micronesia include seven whose breeding grounds are circumpolar, two whose breeding grounds are in Arctic America and one whose breeding ground is in Arctic Asia. The winter ranges of these ten species include four which are circumtropical, three which are Asiatic, one which is restricted to Oceania, and only two which are American. The ability of the shore birds to migrate almost as well over water as over land may explain their spread into Oceania. The likelihood that shore birds, when migrating may have ventured to Micronesia and Polynesia initially from the Asiatic side of the Pacific is strongly suggested by the data given in the paragraph above. Also, on the Asiatic side of the Pacific there are large numbers of islands, which form several archipelagoes extending from Kamchatka south to Malaysia. Once accustomed to migrating along these chains of islands from the Arctic to Australia, birds would probably have to make only minor adjustments to extend the breadth of their migratory routes eastward into the islands of the Pacific Ocean. In contrast, on the Pacific coast of North America there are few coastal or offshore islands and there is a vast area of open water separating the Hawaiian Islands from the American mainland. Probably the vastness of this area of water offers little stimulus to birds to expand their migratory ranges westward, and in part accounts for the small North American contingent in the population of shore birds of the Central Pacific. Some North American shore birds do visit the Pacific. The brisk trade winds from the northeast might be an aid to the birds in their flights from Nearctica to Hawaii. The long flight now made by shore birds going from the Aleutians to the Hawaiian Islands may have commenced as a gradual expansion from the west, or perhaps such a route was initiated by birds flying northward through the Hawaiian Chain to the Arctic in migrating to their breeding grounds, and then later returning _via_ the same route to reach their wintering grounds. ROUTES OF MIGRATION [Illustration: FIG. 6. Routes of migration used by shore birds in the Pacific area. From west to east these are: The Asiatic-Palauan Flyway, the Japanese-Marianan Flyway, the Nearctic-Hawaiian Flyway.] The small and isolated islands of Oceania might, upon first inspection, seem to offer but little attraction to shore birds. Hesse, Allee and Schmidt (1937:172, 173) point out that the "open southeastern Pacific" being least supplied with water from land sources, which is an important means of fertility, is known to have one of the poorest faunas found anywhere in the oceans. However, there are extensive tidal flats, especially on the leeward sides of the islands, and these flats apparently afford extensive feeding grounds for these birds. Also, the absence of competition from resident birds as well as the virtual absence of predatory animals (native man and his domesticated animals excepted) are other factors which may help to make the islands attractive wintering grounds for shore birds. Only a few birds have been banded in the Pacific, and the knowledge which comes from the recovery of banded birds gives but little aid to the student of movements of birds in the Pacific. The probable flyways for migratory shore birds there have to be deduced from sight records, data from specimens collected, known stations of breeding and wintering (summarized by Peters, 1934:234-293), and from a study of maps of the region. Analysis of information from the above-mentioned sources indicates that there are three routes taken by shore birds which migrate from Micronesia to and from their northern breeding grounds (see figure 6): (1) Asiatic-Palauan Flyway; (2) Japanese-Marianan Flyway; (3) Nearctic-Hawaiian Flyway. 1. ASIATIC-PALAUAN FLYWAY. For shore birds, there appears to be a migration route extending almost due south from the Riu Kiu and the Japanese islands to the Palau Islands. Some birds may migrate _via_ the Philippines and others may pass to the east of the Philippines. This route is considered to be distinct from that used by birds which follow the Asiatic Coast and coastal islands, because the Palau Islands are situated approximately 600 miles east of the Philippines. Moreover, there are fewer species--only 20 recorded from the Palaus as compared with the number recorded from islands closer to the mainland of Asia. Delacour and Mayr (1946:68-74) list 46 species of shore birds from the Philippines; the Hand-list of Japanese Birds (Hachisuka _et al_, 1942) lists 34 species from the Riu Kiu Islands. The information available indicates that migrant shore birds which utilize this flyway move east into the Carolines (examples, _Tringa nebularia_, _Charadrius leschenaultii_); however, the recording of 20 species from the Palaus as compared with only 12 species in the western Carolines (table 4) indicates that this spread eastward may not be very pronounced. Migrants in autumn probably move from the Palaus in a southerly direction toward the New Guinea area. Eight species of shore birds which reach the Palaus (and adjacent islands in the western Carolines), are not recorded from other parts of Micronesia. Species which apparently utilize the Asiatic-Palauan Flyway are listed in table 5. 2. JAPANESE-MARIANAN FLYWAY. Shore birds from Asiatic, and probably Aleutian and Alaskan, breeding grounds may follow the Asiatic Coast or the adjacent island chains southeast to the Japanese Archipelago. From there some of the birds apparently fly south through the Bonin and Volcano islands to the Marianas, from where they may spread in fanlike fashion to the southeast, south and southwest, even reaching to the Palau Islands (example, _Heteroscelus incanus_). The number of species of shore birds recorded from the Marianas (see table 4) is greater than that found in the Carolines, but it must be remembered that more intensive investigations have been made by ornithologists in the Marianas, which might account for the recording of more species (especially stragglers, such as _Gallinago gallinago_). Species which apparently use this flyway are named in table 6. 3. NEARCTIC-HAWAIIAN FLYWAY. Shore birds from breeding grounds in western Canada, Alaska, the Aleutians, the Bering Sea area, and probably northeastern Asia may fly in a southerly direction along a broad front to the Hawaiian Islands. This flyway is probably the one which supplies to central and eastern Oceania the largest wintering populations of shore birds. From the Hawaiian Islands birds may fly directly south through the scattered islands to southern Polynesia, or they may fly in a southwesterly direction and reach the Marshall Islands. The shore birds which visit the Marshall Islands apparently move south through the Gilbert, Ellice and other more southern island groups rather than west into the Carolines as exemplified by the fact that _Numenius tahitiensis_, a characteristic migrant through the Marshalls from the Hawaiian Islands, is rarely found west of the Marshall Islands in Micronesia. Species which apparently use this flyway are listed in table 7. Flyways additional to the three suggested above may be utilized by some shore birds on their southward (and northward) migrations. Species reaching Wake and the Marcus Islands may fly directly south from the islands of the North Pacific. Bryan (1903:115, 116) lists four species of shore birds from Marcus (_Erolia acuminata_, _Heteroscelus incanus_, _Pluvialis dominica_, _Arenaria interpres_). TABLE 4. LIST OF SPECIES OF SHORE BIRDS KNOWN FROM FIVE GEOGRAPHICAL AREAS OF MICRONESIA Western Central Eastern Palaus Carolines Marianas Carolines Carolines Marshalls Number of species 20 12 17 11 10 10 TABLE 5. SHORE BIRDS WHICH MAY USE THE ASIATIC-PALAUAN FLYWAY Regular Visitors Uncommon? Visitors _Pluvialis dominica fulva_ _Charadrius dubius curonicus_ _Charadrius mongolus stegmanni_ _Charadrius alexandrinus_ _Charadrius leschenaultii_ _Calidris tenuirostris_ _Numenius phaeopus variegatus_ _Erolia ferruginea_ _Numenius madagascariensis_ _Erolia subminuta_ _Limosa lapponica baueri_ _Limicola falcinellus sibirica_ _Tringa nebularia_ _Tringa glareola_ _Actitis hypoleucos_ _Heteroscelus brevipes_ _Arenaria i. interpres_ _Gallinago megala_ _Erolia minuta ruficollis_ TABLE 6. SHORE BIRDS WHICH MAY USE THE JAPANESE-MARIANAN FLYWAY Regular Visitors Uncommon? Visitors _Pluvialis dominica fulva_ _Squatarola squatarola_ _Charadrius mongolus stegmanni_ _Numenius tahitiensis_ _Numenius phaeopus variegatus_ _Numenius madagascariensis_ _Limosa lapponica baueri_ _Tringa glareola_ _Actitis hypoleucos_ _Gallinago gallinago gallinago_ _Heteroscelus brevipes_ _Erolia minuta ruficollis_ _Heteroscelus incanus_ _Arenaria i. interpres_ _Gallinago megala_ _Crocethia alba_ _Erolia acuminata_ TABLE 7. SHORE BIRDS WHICH MAY USE THE NEARCTIC-HAWAIIAN FLYWAY Regular Visitors Uncommon? Visitors _Pluvialis dominica fulva_* _Squatarola squatarola_* _Numenius tahitiensis_* _Charadrius hiaticula semipalmatus_[+] _Heteroscelus incanus_* _Charadrius v. vociferus_ _Arenaria i. interpres_* _Limosa lapponica baueri_* _Crocethia alba_* _Tringa melanoleuca_*[+] _Phalaropus fulicarius_ _Gallinago delicata_ _Phalaropus lobatus_*? _Erolia melanotos_* _Erolia acuminata_* * Indicates species which are found in Micronesia.] [+] Indicates species not recorded from the Hawaiian Islands; see Bryan and Greenway (1944:109-115).] POPULATIONS OF SHORE BIRDS IN MICRONESIA Although shore birds have been observed in Micronesia on many occasions, actual counts of numbers of individuals of the different birds have rarely been made. Kubary, Finsch, Marche, Seale and other early collectors and observers record some data of this kind as have the Japanese investigators in later times. William Coultas of the Whitney South Sea Expedition obtained considerable information of this nature at Guam, Saipan, Kusiae, Ponapé, and the Palaus, but it is unpublished. His records were made in fall, winter and spring, when migrants were present in large numbers and these observations offer evidence that many of the migrants are comparatively numerous, especially in the Carolines, throughout the winter months. McElroy's observations made on his trip for NAMRU2 to Truk in December, 1945, offer further evidence of this. TABLE 8. POPULATIONS OF MIGRATORY SHORE BIRDS SEEN AT GUAM IN 1945 Column headings: A: _Pluvialis dominica_ B: _Charadrius mongolus_ C: _Numenius phaeopus_ D: _Actitis hypoleucos_ E: _Heteroscelus_ spp. F: _Heteroscelus incanus_[+] G: _Heteroscelus brevipes_[+] H: _Limosa lapponica_ I: _Arenaria interpres_ J: Unidentified K: Total No. of individuals L: Total No. of species =============+====+====+====+====+====+====+====+====+====+====+====+==== | A | B | C | D | E | F | G | H | I | J | K | L -------------+----+----+----+----+----+----+----+----+----+----+----+---- March 11 | x | | | | | | | | | | x | 1 March 17 | 10 | | 1 | | 2 | | | | | | 13 | 3 March 19 | x | | x | | x | | | | x | | x | 5 April 24 | x | | | | | | | | | | x | 1 April 26 | | | | | | | | 1 | | | 1 | 1 May 19 | | | | | 3 | 2 | | | | | 5 | 1 May 21 | | | | | 4 | | | | | | 4 | 1 May 26 | | | | | x | 2 | | | | | x | 1 June 1 | | | 1 | | | | | | | | 1 | 1 June 6* | | 1 | x | | x | | 1 | | | x | x | 4 June 11 | | | 1 | | | | | | | | 1 | 1 June 12 | | | 12 | | 2 | | | | | | 14 | 2 June 22 | | | 2 | | | | | | | 1 | 3 | 2 June 30 | | | | | | | | | | 2 | 2 | 1 July 7 | | | 2 | | | | | | | | 2 | 1 July 8 | 3 | | x | | 1 | | | | | | x | 3 July 16* | 6 | | 3 | 3 | 4 | | 1 | | | | 17 | 4 July 19 | x | | x | | x | | | | | | x | 3 July 24* | 10 | | 6 | | 3 | | 2 | | 3 | 5 | 29 | 5 July 26 | | | 8 | | | | | | | | 8 | 1 August 2 | | | x | | | | | | | x | x | 2 August 3 | | | 1 | | | | | | | | 1 | 1 August 6* | | | 6 | | 12 | | | | | | 18 | 2 September 29 | x | | x | | | | | | x | | x | 2 October 3* | x | | | | x | | | | | | x | 2 October 10 | x | | x | | x | 2 | | | x | | x | 4 October 11 | | | | | | | | | 2 | | 2 | 1 October 23* | x | | x | | x | 1 | 1 | | x | | x | 5 October 24 | x | | | | | | | | | | x | 1 -------------+----+----+----+----+----+----+----+----+----+----+----+---- x Observed but numbers not recorded. * Observations made on beach at Agfayan Bay area. [+] Figures based on identified skins. None of the above workers, however, obtained very much information on comparative numbers of species. Tables 8, 9, and 10 present the writer's findings on populations of migratory shore birds in Micronesia in 1945. At Guam, as shown in table 8, the records for March, April and early May are few, owing to a limited amount of field observation. Beginning in late May and until October 24 a greater amount of time was spent in the field and more regular records were obtained. No observations were made by the author at Guam in the period from August 11 to September 25. The dates marked with an asterisk are those on which observations were made on the extensive tidal flats at Agfayan Bay and vicinity. These flats, at low tide, present excellent feeding grounds for waders and in 1945 were undisturbed by parties of service personnel, because the area was "off-limits." Table 8 shows that _Pluvialis dominica_, _Numenius phaeopus_, and _Heteroscelus_ spp. were the shore birds most frequently found at Guam in this period. _Pluvialis dominica_ was the most numerous of the three species. Of _Heteroscelus_ there was approximately equal representation of _H. incanus_ and _H. brevipes_ as indicated by specimens collected. These birds were not identified to species in the field. Although records were made only infrequently in the spring migration, such information as was obtained indicates that the populations were largest in March and early April. On April 24, _Pluvialis dominica_ was the only bird observed on beaches and in upland openings. On April 26, a single _Limosa lapponica_ was recorded. On May 15, no shore bird was seen on a trip along several beaches. In late May and early June, single individuals of _Heteroscelus_ were found. Of this genus, those collected in May were in nuptial plumage, and those collected in June were in winter plumage and probably should be classed as non-migrants. _Numenius phaeopus_ was occasionally recorded beginning in early June, but waders were totally absent from beaches at Agfayan Bay and vicinity on June 18 and 19. Few shore birds were seen in early August. In late September, birds, especially _Pluvialis dominica_, _Numenius phaeopus_, and _Heteroscelus_ spp., were numerous. These species were numerous until October 24, when observations were discontinued. Of the 17 species of migratory shore birds recorded from the Mariana Islands, eight were identified. Of these eight, three species, _Limosa lapponica_, _Actitis hypoleucos_, and _Charadrius mongolus_, were found on only one occasion. Never more than four species were identified on a single field trip. These data give an idea of the lack of variety of species that may be observed on Micronesian islands. TABLE 9. POPULATIONS OF MIGRATORY SHORE BIRDS SEEN AT ULITHI ATOLL IN 1945 Column headings: Fas.: Fassari Man.: Mangejang Los.: Losiep ======================+================================================ | ISLAND AND DATE +-----------------------+-----+-----+-----+------ SPECIES | Potangeras | Fas.| Man.| Pau | Los. +-----------------------+-----+-----+-----+------ | Aug.| Aug.| Aug.| Aug.| Aug.| Aug.| Aug.| Aug. | 14 | 15 | 16 | 17 | 19 | 20 | 21 | 22 ----------------------+-----+-----+-----+-----+-----+-----+-----+------ _Pluvialis dominica_ | | | 6 | 5 | 4 | | 10 | 5 _Charadrius mongolus_ | | | | | | | x | 2 _Numenius phaeopus_ | 1 | 4 | | 1 | | | 1 | 2 _Actitus hypoleucos_ | | | | | | | 2 | 2 _Heteroscelus_ spp. | | | | | 2 | | 6 | 3 _H. incanus_* | | | | | | 1 | | 2 _Crocethia alba_ | | | | | | | 30 | 5 +=====+=====+=====+=====+=====+=====+=====+====== Total No. | | | | | | | | of Individuals | 1 | 4 | 6 | 6 | 6 | 1 | 49 | 21 Total No. of | | | | | | | | Species | 1 | 1 | 1 | 2 | 2 | 1 | 6 | 6 ----------------------+-----+-----+-----+-----+-----+-----+-----+------ x Observed but numbers not recorded. * Figures based on identified skins. Table 9 lists the shore birds seen at Ulithi Atoll, Caroline Islands, on eight field excursions in the period from August 14 to August 22, 1945. Of seven species of shore birds known to visit the atoll, six were taken in this period. As observed at Guam, _Pluvialis dominica_ and _Numenius phaeopus_ were the species most frequently found. _Heteroscelus_ was seen on three occasions; those collected were identified as _H. incanus_. Most of the shore birds were seen at Pau and Losiep, islands unoccupied by man. Similar tidal flats are present at most of the other small islands in the atoll, but these islands (Asor, Fallalop, Potangeras, Fassarai and Mangejang were visited) were occupied by small detachments of service personnel or by natives, which may have tended to keep many of the shore birds away. At the more populated islands of Asor and Fallalop, no shore birds were seen. Almost as many species were recorded at Ulithi on the eight field trips as were found by the author at Guam in eight months of observations. TABLE 10. POPULATIONS OF MIGRATORY SHORE BIRDS SEEN AT THE PALAU ISLANDS IN 1945 =======================+==========================================+====== | Peleliu |Angaur +---------+--------------------------------+------ SPECIES | August | September | +----+----+----+----+----+-----+-----+-----+ Sept. | 24 | 28 | 1 | 6* | 8* | 9[+]| 16* | 20* | 21 -----------------------+----+----+----+----+----+-----+-----+-----+------ _Pluvialis dominica_ | x | | x | x | 25 | | 20 | x | x _Charadrius mongolu_ | | | | x | 25 | | 5 | x | x _C. leschenaultii_ | | | | x | 25 | | 5 | x | x _Numenius phaeopus_ | | | 3 | x | 30 | | 20 | x | x _N. madagascariensis_ | | | | | 1 | 1 | | 15 | _Limosa lapponica_ | | | | | 3 | | 4 | | _Tringa nebularia_ | | 6 | | | | | 3 | | _T. glareola_[++] | | | | | | | | | 1 _Actitis hypoleucos_ | | | | | | 2 | | | _Heteroscelus_ sp. | | | x | x | 75 | | x | x | x _H. brevipes_[++] | | | | 3 | 2 | | 2 | | _Arenaria interpres_ | | | | | 20 | | | | _Capella megala_ | | | | | | | | | 4 _Calidris tenuirostris_| | | | | 15 | | 20 | | _Erolia minuta_ | | | | x | 50 | | 50 | x | x _E. acuminata_[++] | | | | | | | | | 3 _E. ferruginea_[++] | | | | 1 | | | | | _Limicola | | | | | | | | | falcinellus_[++] | | | | | | | | | 1 Unidentified | x | | | x | x | | x | x | x +====+====+====+====+====+=====+=====+=====+====== Total number of individuals | x | 6 | x | x |271+| 3 |129+ | x | x Total number of species | 1 | 1 | 3 | 7 | 10 | 2 | 9 | 7 | 10 -----------------------+----+----+----+----+----+-----+-----+-----+------ * Observations made on beaches at Akarakoro Point, Peleliu. [+] Observations made at fresh water ponds. x Observed but numbers not recorded. [++] Figures based on identified skins. Table 10 presents field counts at the Palau Islands in the period from August 24 to September 21, 1945. Of 20 species of shore birds known from the Palaus, 17 species were collected or identified on this trip. It was apparent that the fall migration was at its height at this time. Birds were numerous at inland openings and ponds, air field strips, and on the extensive tidal flats at Akarakoro Point. The latter area is between Peleliu and the adjacent island of Ngesebus to the north. Several observations were made at this area (as indicated by the dates marked with asterisks in the table); on September 8, 271+ shore birds were counted; on September 16, 129+ were counted. Six species were observed to be abundant. The majority of the birds found at these beaches were in small flocks which consisted of several birds of one or more species. The birds observed at Angaur on September 21 were seen at several fresh and brackish ponds. Four species (_Tringa glareola_, _Erolia acuminata_, _Limicola falcinellus_, _Gallinago megala_), which were not taken on the tidal flats or elsewhere at Peleliu, were found at these ponds. The abundance, and more especially the variety, of shore birds at the Palau Islands during this period was in marked contrast to the smaller and less diversified populations of shore birds in rather similar insular environments at Ulithi and Guam. These differences offer support for the supposition that the Asiatic-Palauan Migratory Shore Bird Flyway is distinct from the Japanese-Marianan Migratory Shore Bird Flyway. LAND AND FRESH-WATER BIRDS The land and fresh-water avifauna of Micronesia consists of 147 kinds of birds. Of these, 37 kinds are non-residents, 104 kinds are residents, and 6 kinds have been introduced by man. The 104 resident birds include 98 kinds (94 percent) which are found only within the confines of Micronesia. Included in these 98 kinds which are restricted to Micronesia are 5 endemic genera, 31 endemic species and 76 endemic subspecies. Gulick (1932: 407, 413) stresses that the fauna and flora of the oceanic islands may be "disharmonic" (he uses Easter Island as his example) and says, "It is evident that mature groups of islands will attain an internal harmony, from the standpoint of the systematist. But this harmony, instead of reflecting the pre-existing harmony of some continental source (as in the case of the continental islands or land-bridge remnants) will be recognizably derivable by descent from a quite limited number of original importations, at the start distinctly miscellaneous and 'disharmonic'." Analysis of the land and fresh-water avifauna of Micronesia supports Gulick's view. [Illustration: FIG. 7. Divisions of the islands of part of the Pacific Basin from the standpoint of the distribution of land birds and fresh-water birds: (1) Micronesia; (2) Hawaii; (3) Central Polynesia; (4) Eastern Polynesia; (5) Southern Melanesia; (6) Melanesia.] As mentioned previously, the islands of Micronesia, from the zoogeographical viewpoint, have been regarded as a part of the Polynesian Subregion of the Australian Region. Mayr (1941a: 192) defines the Polynesian Subregion as comprising "all the tropical and subtropical islands of the Pacific Basin which indicate by their impoverished fauna that they have had no recent continental connection (after early Tertiary) and which derived the major part of their fauna directly or indirectly from the Papuan Region or jointly from Australia and the Papuan Region." As based on the distribution of the resident avifauna, Mayr (1941a:193) subdivides the Polynesian Subregion into the following districts: Micronesia ("including Palau, the Marianne, Caroline, Marshall, and Gilbert islands"); Central Polynesia ("including Fiji, Tonga, Samoa, Phoenix, Ellice, Union islands, and a number of small islands, such as Rotuma, Fotuna, Keppel, Niue, Niouafu, and Uvea"); Eastern Polynesia ("all the islands east of 165° W"); and Southern Melanesia ("including the Santa Cruz group, Banks Islands, New Hebrides, Loyalty Islands, and New Caledonia"). He considers that the Hawaiian Islands, Solomon Islands, and possibly New Caledonia are bordering districts to the Polynesian Subregion. Figure 7 shows the divisions of the islands of the Pacific Basin from the standpoint of the distribution of the land and fresh-water birds. I have placed the Gilbert and Marshall islands in the Central Polynesian rather than in the Micronesian District. For purposes of discussion in this report, however, I am considering the Marshalls to be a part of Micronesia. The birdlife of the Bonin and Volcano islands northward of the Marianas is regarded as having its closest affinities to the Japanese avifauna. The Papuan or Melanesian Subregion of the Australian Region includes the districts of New Guinea and Northern Melanesia, including the Bismarck Archipelago, the Admiralty Islands, and the Solomon Islands. The resident land and fresh-water birds of Micronesia have been derived from several sources. Studies of these birds and their closest relatives in adjacent areas indicate that the avifauna has been derived from five different sources: Polynesia, Melanesia, the Moluccas and Celebes, Philippines, and Palearctica. POLYNESIAN COMPONENT _Aphanolimnas monasa_ (extinct?), _Ptilinopus porphyraceus_, and _Ducula oceanica_ are the only species of birds which have reached Micronesia directly from Polynesia. There are in Micronesia, as Mayr (1941b: 204) points out, eight species "which are members of typically Polynesian species or genera" and six species which are either Papuan or Polynesian. The relationships between Polynesian and Micronesian birds is evident, but insofar as the pathways of colonization are concerned the majority of these Micronesian species listed by Mayr have come from elsewhere than Polynesia and the birds of these two areas are thought to have arisen from common ancestors. _Aphanolimnas_, _Ptilinopus_, and _Ducula_ apparently invaded Micronesia from Central Polynesia _via_ the Marshall Islands through a rather continuous chain of islands and atolls. _Aphanolimnas_ is known only from Kusaie in the extreme eastern part of the Carolines while _Ptilinopus_ and _Ducula_ are known from the Marshalls, Carolines, and Palaus. MELANESIAN COMPONENT The Papuan or Melanesian Region (New Guinea, Bismarck Archipelago, Solomon Islands) has supplied to Micronesia its greatest number of endemic land and fresh-water residents. Fifty kinds of birds belonging to the following species reached Micronesia from Melanesia: _Nycticorax caledonicus_, _Megapodius lapérouse_, _Ptilinopus roseicapillus_, _Gallicolumba xanthonura_, _G. canifrons_, _Caloenas nicobarica_, _Halcyon cinnamomina_, _Trichoglossus rubiginosus_, _Collocalia inquieta_, _Edolisoma tenuirostre_, _Rhipidura rufifrons_, _Metabolus regensis_, _Monarcha godeffroyi_, _M. takatsukasae_, _Colluricincla tenebrosa_, _Aplonis opacus_, _A. pelzelni_, _A. corvinus_ (extinct?), _Cleptornis marchei_, _Myzomela cardinalis_ (probably by way of Southern Melanesia), _Rukia palauensis_, _R. oleaginea_, _R. ruki_, _R. sanfordi_, _Erythrura trichroa_. The colonization of Micronesia by these species has probably extended over a considerable period of time. _Megapodius_, _Trichoglossus_, and _Aplonis corvinus_ may represent older colonizations which have become well differentiated from the ancestral forms; _Nycticorax_, _Myzomela_, and _Erythrura_ may have become established later and have had "less time" to become modified from the ancestral forms. Birds from Melanesia have reached Micronesia probably by direct flight to the Caroline Islands. Aided by favorable winds which blow from the southwest, south and southeast during the period from May to November, birds, particularly the young of the year, might conceivably be blown in the direction of the Carolines, where 57 percent of the birds derived from Melanesia reside. The Palaus are populated with 15 percent, the Marianas with 28 percent, and the Marshalls (lacking "high" islands) with none; these may be secondary colonizations from the Carolinas excepting _Ptilinopus_, _Megapodius_, _Gallicolumba canifrons_, _Cleptornis_, and _Colluricincla_. The Marshall Islands have received no avian components from Melanesia. The absence of "high" islands in the Marshalls and the possible inability of birds accustomed to life on the luxuriant islands of Melanesia to become established on relatively barren atolls are logical reasons for this. Instead of New Guinea itself, the outlying islands of Melanesia (Bismarck Archipelago, Solomons, Southern Melanesia) probably have been the principal "taking-off" places for birds invading Micronesia. MOLUCCAN AND CELEBESIAN COMPONENTS Birds which reached Micronesia by way of the islands of Celebes and the Moluccas may have been derived originally from Melanesia. The following birds appear to have used this route: _Porphyrio porphyrio_, probably _Halcyon chloris_, _Rhipidura lepida_, _Myiagra oceanica_, _Zosterops conspicillata_, and _Z. cinerea_. These birds apparently became established initially in the Palaus; _Porphyrio_ and _Rhipidura lepida_ have not been recorded elsewhere in Micronesia, but _Myiagra_ and the two species of _Zosterops_ have spread to the Carolines and Marianas, although not into the Marshall Islands. Wind from the southeast in summer and fall has probably been a factor aiding these colonizations. The population of _Gallinula chloropus_ resident at Palau may also have arrived by this route. PHILIPPINE COMPONENT Ten of the kinds of birds of Micronesia have come from or by way of the Philippine area. These are known principally from the Palaus and the Marianas and include: _Rallus philippinus_, _R. owstoni_, _Poliolimnas cinereus_, _Caprimulgus indicus_, _Corvus kubaryi_, _Psamathia annae_, _Artamus leucorhynchus_, possibly _Lonchura nigerrima_, and _Collocalia inexpectata_. The Philippines may have been the actual point of dispersal of the birds (example, _Psamathia_), or may have been used as a stepping stone to Micronesia by birds coming from Melanesia (examples, _Rallus_ and _Artamus_), by birds from Malaysia (example, _Collocalia_), and by birds from Asia (example, _Caprimulgus_). Two birds of this component have reached the islands of eastern Micronesia. A subspecies of _Lonchura nigerrima_ is endemic at Ponapé, and a subspecies of _Poliolimnas cinereus_ occurs on several islands in the Carolines and has even been recorded at Bikini in the Marshall Islands. Three species are known only from the Palaus; two are known only from the Marianas. PALEARCTIC COMPONENT [Illustration: FIG. 8. Faunal areas from which the resident land birds and fresh-water birds of Micronesia have been derived. (1) Palearctica; (2) Philippines; (3) Moluccas and Celebes (Malaysia); (4) Melanesia (New Guinea and northern Melanesia); (5) Polynesia.] Birds of Micronesia which have been derived directly from Palearctica are _Gallinula chloropus guami_, _Otus podarginus_, _Asio flammeus_, _Acrocephalus luscinia_ and _Anas oustaleti_. Apparently _Gallinula_, _Asio_, and _Acrocephalus_ arrived in Micronesia by way of the chain of islands from Japan southward to the Bonins, Volcanoes, and Marianas. _Otus_ reached Palau from Asia, possibly by way of the Philippines. The smallness of the representation of this component may result partly from lesser ability of the northern birds to adapt themselves to, and to establish themselves on, the semi-tropical and tropical islands of Micronesia as compared with birds from Melanesia where the climate and ecologic conditions resemble more closely those found in Micronesia. Evidence supporting this possibility is the large number of Palearctic residents in the Bonin and Volcano islands as compared with fewer in the Marianas; the Bonins and Volcanoes are less tropical and more temperate in climate. Table 11 lists the birds concerned, by faunal areas from which the birds have been derived and shows the number of kinds of birds which are present as a result of these colonizations. There is some overlap in the numbers since some endemics may be found in more than one area in Micronesia. Figure 8 shows the faunal areas from which the endemic land and fresh-water birds of Micronesia have been derived. Melanesia (Papua) supplied 52 percent of this population. Birds reaching Micronesia by way of the Moluccas and Celebes include 21 percent of the total population. The Philippines have supplied 10 percent; Polynesia, 9 percent; and Palearctica, 8 percent. This population of endemic land birds and fresh-water birds has seemingly evolved from 46 colonizations, of which 27 have been derived from Melanesia, 6 from the Philippines, 5 from the Moluccan and Celebean areas, 5 from Palearctica, and 3 from Polynesia. The Palaus have received a large part of their avifauna from the west (Moluccas, Philippines, Palearctica). Their Melanesian component is mostly the result of secondary colonization from the Carolines. The Carolines have received a greater share of their land birds and fresh-water birds from Melanesia and a smaller share from Polynesia. The Marshalls are definitely associated with the Polynesian element. The Marianas exhibit a considerable amount of secondary colonization from other Micronesian islands, as well as some unique components from the Philippines, Melanesia, and Palearctica. Thus, the number of endemics in Micronesia provides little information concerning the actual number of successful colonizations by birds from other areas. Many of the endemics probably have resulted in this way: Individuals of an endemic subspecies flew to another island and there underwent further differentiation, producing another endemic subspecies. Such secondary colonization probably is going on now. This analysis of the avifauna shows that Micronesia, with the exception of the Marshall Islands (and the Gilbert Islands), has but little affinity to Polynesia. It has greater affinity, from the zoogeographical standpoint, with the Papuan Region (Melanesia). TABLE 11. AVIFAUNAL COMPONENTS WHICH MAKE UP THE ENDEMIC RESIDENT LAND AND FRESH-WATER BIRD POPULATION OF MICRONESIA =================+=======+=============+===========+==========+========== | | Western | | | FAUNAL COMPONENT | Palau | and central | Eastern | Marianas | Marshalls | | Carolines | Carolines | | -----------------+-------+-------------+-----------+----------+---------- Polynesian | 2 | 3 | 5 | 0 | 3 Melanesian | 11 | 14 | 16 | 12 | 0 Moluccan-Celebean| 6 | 3 | 4 | 7 | 0 Philippine | 6 | 2 | 2 | 4 | 1 Palearctic | 2 | 1 | 2 | 5 | 0 +-------+-------------+-----------+----------+---------- Totals | 27 | 23 | 29 | 28 | 4 -----------------+-------+-------------+-----------+----------+---------- SPECIATION Of the 104 native fresh-water birds and land birds which are resident in Micronesia, only 7 kinds or 6.5 percent remain undifferentiated from populations elsewhere. These birds are _Phalacrocorax melanoleucus_, _Pandion haliaetus_, _Demigretta sacra_, _Ixobrychus sinensis_, _Anas poecilorhyncha_, and possibly _Lonchura punctulata_ (may be an introduction by man). Another bird, _Gallinula chloropus_, a resident at Palau, may or may not be distinct from the gallinule of Malaysia, _G. c. orientalis_. Of the 104 resident birds, 97 kinds or 93.5 percent have become differentiated and can be separated taxonomically from populations elsewhere. Of the kinds of birds which are found only in Micronesia, there are 5 endemic genera (16 percent), 31 endemic species (32 percent) and 76 endemic subspecies (75 percent). If we consider the avifauna of Micronesia as a single element, the endemism is high as compared with that on larger and less isolated islands. For example, Mayr (1944a:174) found 137 resident birds on Timor including 22 endemic species (16 percent) and 67 endemic subspecies (47.5 percent). Stresemann (1939b:313) found 220 species including 84 endemic species (38.2 percent) on Celebes. Mayr (1944a:174) also writes that on Java, of 337 breeding species, 16 (4.8 percent) are endemic, and on New Caledonia, of 68 species 19 (27.9 percent) are endemic. Speciation in Micronesia has not progressed much farther than that at New Caledonia and not so far as at Celebes, but subspeciation has progressed considerably more than at the island of Timor. The avifauna of the Hawaiian Islands, as recorded by Bryan and Greenway (1944), has 73 resident land birds and fresh-water birds, all of which are endemic, including one family, 23 genera and 36 species. The North American night heron, _Nycticorax n. hoactli_, may be included in this list as the only resident which is undifferentiated. The development of full specific differentiation within the resident avifauna is greater in the more isolated Hawaiian chain where 49 percent of these birds are regarded as endemic species, while in Micronesia, which is less remote from other bodies of land, the specific endemism is only 32 percent. TABLE 12. ENDEMISM IN FAMILIES OF NATIVE LAND AND FRESH-WATER BIRDS IN MICRONESIA ==================+===========+=========+=========+============+========= | | Endemic | Endemic | Endemic | Total FAMILY | Residents | genera | species | subspecies | endemic ------------------+-----------+---------+---------+------------+--------- Phalacrocoracidae | 1 | 0 | 0 | 0 | 0 Ardeidae | 3 | 0 | 0 | 1 | 1 Anatidae | 2 | 0 | 1 | 0 | 1 Accipitridae | 1 | 0 | 0 | 0 | 0 Megapodidae | 2 | 0 | 1 | 2 | 2 Rallidae | 7 | 1* | 2 | 4 | 6 Columbidae | 13 | 0 | 4 | 11 | 13 Psittacidae | 1 | 0 | 1 | 0 | 1 Strigidae | 2 | 0 | 1 | 1 | 2 Caprimulgidae | 1 | 0 | 0 | 1 | 1 Apodidae | 5 | 0 | 1 | 5 | 5 Alcedinidae | 7 | 0 | 1 | 7 | 7 Campephagidae | 3 | 0 | 0 | 3 | 3 Corvidae | 1 | 0 | 1 | 0 | 1 Sylviidae | 5 | 1 | 2 | 4 | 5 Muscicapidae | 14 | 1 | 6 | 9 | 14 Artamidae | 1 | 0 | 0 | 1 | 1 Sturnidae | 9 | 0 | 3[+] | 7 | 9 Meliphagidae | 7 | 1 | 1 | 6 | 7 Zosteropidae | 14 | 1 | 6 | 10 | 14 Ploceidae | 5 | 0 | 0 | 4 | 4 +-----------+---------+---------+------------+--------- Totals | 104 | 5 | 31 | 76 | 97 ------------------+-----------+---------+---------+------------+--------- * _Aphanolimonasa_ is included but may be extinct. [+] _Aplonis corvinus_ is included but may be extinct. Table 12 lists the families of land birds and fresh-water birds which have resident members as part of the avifauna of Micronesia. It can be observed from the table that only two families are represented by no endemic kinds, several families are represented by one or two endemic kinds, and others are represented by as many as 14 endemic kinds. Endemism has reached its greatest development in the families Rallidae (6), Columbidae (13), Apodidae (5), Alcedinidae (7), Sylviidae (5), Muscicapidae (14), Sturnidae (9), Meliphagidae (7), and Zosteropidae (14). Generic endemism is greatest in the Sylviidae where one endemic genus occurs among 5 endemic species and subspecies (20 percent), in Rallidae one in 6 (17 percent), in Meliphagidae one in 7 (14 percent). Specific endemism is greatest in Psittacidae and Corvidae where the single representative of each family in Micronesia is considered specifically distinct (100 percent), in Megapodidae and Strigidae one in 2 (50 percent), in Muscicapidae and Zosteropidae 6 in 14 (43 percent) in Sylviidae 2 in 5 (40 percent), in Rallidae 2 in 6 (33 percent), in Sturnidae 3 in 9 (33 percent) in Columbidae 4 in 13 (31 percent). Subspeciation within species which are endemic in Micronesia has occurred in 8 families, occurring within two species in each of the families Columbidae and Zosteropidae and once in each of the families Megapodidae, Apodidae, Alcedinidae, Sylviidae, Muscicapidae, and Sturnidae. In summary, the families of land and fresh-water birds found in Micronesia which have the greatest number of endemic forms are Muscicapidae (14), Zosteropidae (14), Columbidae (13), and Sturnidae (9). Speciation has occurred in the single representative of the families Psittacidae (_Trichoglossus rubiginosus_) and Corvidae (_Corvus kubaryi_). Where family representation is large, speciation has occurred most frequently, as in the Muscicapidae (6 in 14 = 43 percent), in the Zosteropidae (6 in 14 = 43 percent), and in the Columbidae (4 in 13 = 31 percent). Subspeciation has occurred in 8 families, in two species in the Columbidae and Zosteropidae and in one species in each of 6 other families. TIME OF COLONIZATION Previously (and in the accounts of the species to follow), comments are made concerning the subjects of _from where_ and _by what route_ the various kinds of birds have arrived at Micronesia. The problem of _when_ these birds arrived is a difficult and usually unanswerable one. Although geology provides some evidence on the relative age of the islands, and although deposits of bird guano on now elevated coral islands show that oceanic birds have inhabited these islands for a long time, there is no evidence to show the time of the first colonization by land birds. No fossil remains of land birds or fresh-water birds have been found in Micronesia. The relative extent of differentiation in color and structure, which has taken place between different birds, offers one means for estimating the relative length of residence in the area, provided all other factors are equivalent. Concerning the birds of the Galapagos, Lack (1947:113) writes "That Darwin's finches are so highly differentiated suggests that they colonized the Galapagos considerably ahead of the other land birds." Evidence from this source actually is of little value, because the speed of evolution is unknown and its rate may be different in different species, even though they live under the same circumstances. Dobzhansky (1941) says that evolution is a modification of the genetic equilibrium, which, if true, may not result in similar manifestations in different kinds of birds living under the same conditions of life. Relative antiquity of the birds might be ascertained by measuring their ecologic adaptations. The Guam Rail (_Rallus owstoni_) and the Micronesian White-browed Rail (_Poliolimnas_) can be examined in this way. _R. owstoni_ has the ability to live in both brackish and fresh water swamps, as well as in the scrub and grass of the uplands and in the virtually barren, rocky areas in the dense jungles. _Poliolimnas_, on the other hand, appears to be restricted to swampy areas in Micronesia. If the swampy areas were removed this rail probably would become extinct. _R. owstoni_ appears to have been resident in Micronesia longer than _Poliolimnas_. However, ability to live in a variety of habitats might be acquired by _R. owstoni_ in a relatively short time. Another possibility is that the birds, which are less differentiated from their ancestral stocks, may be less differentiated because of suppression of newly evolved characters by dilutions, which result from interbreeding with new birds, which may be arriving at irregular intervals from the ancestral home. Interbreeding of the resident population with newcomers may overshadow any modifications which might have appeared as a result of insular isolation, especially modifications which have little adaptive significance. One would suspect, from their modifications, that _Rallus owstoni_, _Metabolus rugensis_, _Corvus kubaryi_, and other endemic forms have experienced less of this "dilution," than such birds as _Rallus philippensis pelewensis_, _Artamus leucorhynchus pelewensis_, _Myzomela cardinalis_, and others. Murphy (1938) mentions this "dilution" effect in his discussion of "strong" and "weak" subspecies among warblers of the Marquesas. He writes that "strong" subspecies may develop if the birds are present on islands which are upwind from islands containing related subspecies. The wind acts to block interisland migration in these weak-flyers. On the other hand, "weak" subspecies may show the effect of "dilution," being situated on islands downwind from islands containing related subspecies. The direction of the wind acts to aid the weak flyers to move to the downwind islands and continually "dilute" the resident subspecies. Similar examples can be cited for Micronesian birds. Hesse, Allee, and Schmidt (1937:87) write, "Endemism on islands is most frequent in forms for which the difficulty of reaching the island is most extreme, so that new increments of the parent form are unlikely to follow." Employing the criteria mentioned above, the birds of Micronesia can be tentatively divided into four groups as regards the relative time when they arrived at the islands: 1. Birds of ancient colonizations which reached certain individual islands, became modified, and dispersed no farther. Examples are _Aphanolimnas_, _Rallus owstoni_, _Aplonis corvinus_, _Metabolus rugensis_, and _Corvus kubaryi_. 2. Birds of ancient colonizations which reached or dispersed through a number of islands but are now restricted to relatively few islands. Examples are _Ducula oceanica_, _Ptilinopus porphyraceus_, _Megapodius lapérouse_, _Asio flammeus_, and _Acrocephalus luscinia_. 3. Birds of ancient, or possibly more recent, colonizations which initially reached or subsequently dispersed to many of the islands of Micronesia possessing habitat suitable for them. Examples are _Myzomela cardinalis_, the two species of _Halcyon_, _Aplonis opacus_, and _Zosterops conspicillata_. 4. Birds of rather recent colonizations, which may have reached only a few islands and are relatively unmodified from their parental stocks. Examples are _Artamus leucorhynchus_, _Caprimulgus indicus_, _Poliolimnas cinereus_, and _Nycticorax caledonicus_. FACTORS CAUSING DISPERSAL Darlington (1938:274) in discussing the origin of the fauna of the Greater Antilles uses the term "over-water dispersal" in referring to the spread of terrestrial animals across water. He is against the use of the term "accidental dispersal" since many factors besides accident are involved. He contends, as do others, that certain forms of organisms, owing to their "nature and behavior" cross water barriers more successfully than others. These observations may be applied to the "over-water dispersal" of birdlife to the islands of Micronesia. Certain groups of birds are more evident in Micronesia than others. Certain groups of birds which are found on other islands of the Pacific basin are found in Micronesia only in small numbers or may not be represented; Mayr (1945a:284) writes, "Remarkable is the almost complete absence of parrots and honey-eaters, the small number of pigeons and the absence of such widespread genera as _Lalage_, _Turdus_, and _Pachycephala_." The absence of some species and the presence of others produces the characteristic insular effect termed "disharmonic" by Gulick (1932:407), as compared with the continental area or island which derived its avifauna by way of a land bridge. One would think from looking at table 12 that members of the families Rallidae, Columbidae, Muscicapidae, Sturnidae, and Zosteropidae were the most successful colonizers in Micronesia on the basis of the number of successful colonizations (not necessarily on the number of endemics developed from a single colonization). Of these families, Sturnidae and Zosteropidae and possibly Columbidae contain species which often move in flocks. Furthermore, these families as well as the Muscicapidae feed on either fruits, seeds, or insects, any one of which is a type of food which might "give out" suddenly, stimulating a migratory behavior within the birds. From a flock embarking seaward in "search" of more food, a part or even all of the birds might survive in a chance flight to an isolated island in Micronesia. If a flock containing both males and females reaches an island, the species has a good chance of becoming established. Evidence that such a rapid colonization by flocks of birds can take place is found in the remarkable colonization of New Zealand by _Zosterops lateralis_ from the Australian area. The bird was first seen as a winter migrant in New Zealand in 1856 and records of nestings were obtained at North Island in 1862, according to Oliver (1930:489). In the case of rails there is no evidence that they move in flocks; however, they are among the most successful colonizers and are on many of the oceanic islands in the tropical and subtropical oceans. Representatives of several species of the family Rallidae have invaded Micronesia and have successfully established 6, or possibly 7, "colonies." Darlington (1938:274) further writes that "it is no accident that some islands, because of their nature and position, the direction of winds and currents, and the nature of the neighboring land, receive more organisms than other islands do." Semper (1881:294) writes that the distribution of flying creatures "must be in a great degree dependent on the direction and strength of atmospheric currents." These statements are applicable to the history of the avifauna of Micronesia. The Caroline Islands, for example, present a "broad front" for wanderers from the Melanesian islands. As mentioned previously, the prevailing winds in the late spring, summer, and early fall are from the south, southwest, and southeast and would favor bird flight to the northward towards the Carolines. In addition, the breeding season of many of the birds in Melanesia is from November to February, and in the spring and summer, restless young birds seeking living space might fly seaward and aided by the winds fly northward towards Micronesia. Adults, which may have well-established home territories, may be less likely to attempt such a movement. One could conclude from the above discussion that the Micronesian islands, especially the Carolines, might be well populated with a large variety of birds from Melanesia, a scant 500 or more miles away. As it turns out, there are only a few islands in this extensive archipelago possessing proper vegetation, fresh water, and other qualities which make them capable of supporting the land and fresh-water birds of Melanesia. The few islands which have these qualities are the so-called "high" islands, including the entire Mariana chain, the Palaus, and four widely separated islands in the Carolines: Yap, Truk, Ponapé, and Kusaie. The other islands of Micronesia are "low" coral islands, which often lack fresh water and have a meager variety of fruits, insects and other foods. Thus, if birds do reach Micronesia but arrive at the atolls instead of the "high" islands, these birds may be doomed. It is noteworthy that the Micronesian islands are small compared with the Solomons, Fijis, and others. The smaller the island, the fewer the number of ecologic niches and the fewer the kinds of birds present. Mayr (1941b:215) writes that the distance from the nearest land mass and the climatic conditions are important factors controlling dispersal. With regard to the degree of remoteness of the islands, table 13 lists the number of resident land and fresh-water birds present in the Palaus and the "high" islands of the Carolines. Also, the approximate distance from the nearest large land mass and the area in square miles are given. There is some correlation between the distance from the nearest land mass and the number of resident land birds and fresh-water birds. For example, Palau, with 32 resident birds, is only 410 miles from the nearest land mass whereas Kusaie, with only 11 resident birds, is 720 miles from the nearest land mass. The comparative size of the land mass must also be taken into account, as shown by the fact that the large island of Ponapé contains more kinds of birds but is more remote from large land masses than either Yap or Truk. TABLE 13. CORRELATION BETWEEN NUMBER OF RESIDENT LAND AND FRESH-WATER BIRDS AND DISTANCE FROM LARGE LAND MASSES OF "HIGH" ISLANDS OF MICRONESIA Column headings: A: No. of Birds B: Approximate distance from nearest land mass (statute miles) C: Area in square miles ========+====+=====+===================================+===== ISLAND | A | B | Nearest land mass | C --------+----+-----+-----------------------------------+----- Palau | 32 | 410 | Approximately equal distance from | 171 | | | Mindanao, Morotai, New Guinea | | | | | Yap | 13 | 580 | New Guinea | 83 | | | | Truk | 17 | 525 | New Ireland | 50 | | | | Ponapé | 20 | 630 | New Ireland | 145 | | | | Kusaie | 11 | 720 | Malaita (Solomons) | 42 --------+----+-----+-----------------------------------+----- Climatic factors are important in the dispersal of bird life; Micronesia, where the climate is tropical to subtropical, is better suited for colonization by birds from the tropics (Melanesia) than by birds from the temperate or cold climates (Palearctica). The climatic factor may be one of the principal reasons why birds from Palearctica make up only a small part of the avifauna of Micronesia. ANALYSIS OF SPECIATION The process of speciation within insular populations has been discussed by many authors. Hesse, Allee, and Schmidt (1937:517) list the motives for differentiation as, "Special character of insular faunae rests on the conditions common to all islands--isolation, freedom from competition, space restriction, and special insular climates." This combination of characteristics is seldom found elsewhere in nature, and as Murphy (1938:357) points out, an island is the nearest approach to a "man-controlled laboratory." Isolation of small populations is probably the most influential factor in the process of speciation in insular organisms. Lack (1947:134) writes that "in all organisms the isolation of populations is an essential preliminary to the origin of new species." Buxton (1938:265) also stresses this point with regard to the formation of species of insects in Samoa and emphasizes that evolution may occur more quickly in small populations. When mutations appear in such small and isolated populations, they have a greater chance to become fixed than do mutations in less restricted populations in a larger land mass, where such a mutation might be lost by the swamping effects of outbreedings. In addition, Wright (1931 and elsewhere) suggests the possibility of change by accidental elimination and recombination of hereditary characters in micropopulations. This mechanism could well be a factor in Micronesian bird populations, many of which possess no more than a few hundred individuals. Huxley (1938:256) emphasizes that "accidental" mutations may be perpetuated in small, isolated groups. It might be added that such changes might be either advantageous or disadvantageous to the organism concerned. Huxley (1938:263) states also that geographic isolation may promote nonadaptive differentiation, which may be caused by "colonization by a random sample" or by subsequent "preservation of nonadaptive mutations in numerically small isolated groups." Mayr (1942b:237) cites the importance of the "founder" principal for reduced variability in small populations. He points out that if the "founders" of the population carried with them only "a very small proportion of the variability of the parent population," one would expect to see divergence from the ancestral stock. Freedom from competition, especially interspecific strife, is an important factor in differentiation; this is especially true in the early period of colonization. Lack (1947:113) points to the absence of food competitors, especially in the initial period of colonization, as an important influence in the evolution of Darwin's finches at the Galapagos Islands. Once a population has become established and "adjusted" to a given environment on a small island, intraspecific competition might bring about adaptative selection. Subsequent colonists might be eliminated by the competition brought about by these previously adapted organisms, especially if both organisms were adapted for life in the same ecologic niche. Space restriction may be important in such Micronesian birds as _Rhipidura_ and _Myiagra_, which appear to possess recognizable territories. A new colonist entering the territory of one of these birds might be forced out. This competition might not play such an important part among birds, which live in flocks and do not range in closely guarded territories; birds in this group include some pigeons, starlings, and white-eyes. Freedom from the pressure of predation probably exerts a direct influence on formation of species. Aside from a few migrant hawks and two kinds of resident owls, most of the avifauna feeds on vegetable and invertebrate foods. The large lizard _Varanus_ may be classed as the only native predator on many of the islands. Man has been responsible for the introduction of rats, house cats, and other mammals, which may be destructive to birds. Thus, before the advent of man the factor of predation may not have been of great consequence. As mentioned previously, nonadaptive modifications may be perpetuated where the "weeding-out" process by predation is not an influence. Flightless rails have apparently developed in the absence of predation. The absence of the pressure of predation should remove a certain amount of control on the population turn-over. As Hesse, Allee, and Schmidt (1937:521) write, a characteristic of the faunas of oceanic islands is the fact that they are distinguished by the occurrence of "disproportionately developed taxonomic groups in which one or a few basic types have undergone adaptative radiation and come to fill unduly large proportions of the population as compared with conditions that obtain on neighboring continents." Lack (1947:114) writes, "that the absence of predators may well have accelerated the adaptative radiation" in the Galapagos finches. In Micronesia, the starling (_Aplonis opacus_) dominates much of the available habitat on some of the Caroline atolls, and even on "high" islands, where other land birds are present. There appears to be no tendency towards selective adaptations occurring, or towards ecologic isolation. Available data indicate that the life spans of individual birds in Micronesia may be short. For example, it was obvious on many of the islands visited by the NAMRU2 party that starlings (_Aplonis opacus_) in immature plumage outnumbered starlings in adult plumage, although it is possible that immature plumages are retained longer in these island birds than in others. Similar observations were made by Coultas, who noted the ratio of birds in immature plumage to birds in adult plumage at Kusaie to be 5 to 1. If the life span is shorter in these insular forms as compared with that of the ancestral stocks, the higher annual population turn-over would allow for the speed of genetic changes to be accelerated. The origin of species by hybridization between different kinds of organisms has been a subject of frequent discussion. Lack (1947:100) concludes that it is improbable that hybridization has played an important part in the origin of new kinds of birds. Nevertheless, the absence of sufficient mates in the confines of a small island probably stimulates the crossbreeding between two species of birds. Fertile offspring of such a cross might conceivably account for some of the populations, the origins of which are puzzles to present day taxonomists. Such Micronesian forms as _Metabolus_ and _Cleptornis_ could conceivably have been derived in such a manner. Yamashina (1948) has described the origin of _Anas oustaleti_ as a result of hybridization between _A. platyrhynchos_ and _A. poecilorhyncha_. It might be difficult to explain every case of the formation of other insular species on the basis of the effects of isolation and paucity alone. However, Mayr (1942b:236) includes the development of questionable and unusual kinds of insular forms in a general statement: "The potentiality for rapid divergent evolution in small populations explains also why we have on islands so many dwarf or giant races, or races with peculiar color characters (albinism, melanism), or with peculiar structure (long bills in birds), or other peculiar characters (loss of male plumage in birds)." Nutrition may be also a factor influencing speciation in bird life. The types of food plants (coconut, papaya, breadfruit, pandanus, etc.) might be similar on a Micronesian island and on a continental island in the Philippine region; however, the value of these plants as foods might vary and might reflect differences in mineral content of the soils. For example, if the soils on an island lack, or by leaching out have lost, sufficient amounts of potassium and other elements, plants may store foods, not as proteins, but possibly as carbohydrates, simple sugars, or alkaloids. Whether nutritional influences might have a selective effect on the bird populations, has not been ascertained. In summary, it may be said that genetic change altering the phenotypic expression of avian characteristics is no more apt to happen in insular populations than in continental populations but genetic change may have a greater chance of being perpetuated in small insular populations where isolation, limited competition, freedom from the selective influences of predation, and other factors exert influences. CONSERVATION OF THE AVIFAUNA OF MICRONESIA The islands of Micronesia are small and their occupation by man often produces serious effects on the endemic animal life of the islands. The vulnerability of insular bird populations is well attested by the fact that the majority of birds, which have become extinct in the past two hundred years, have been insular forms. Two birds in Micronesia, the Kusaie Rail (_Aphanolimnas_) and the Kusaie Mountain Starling (_Aplonis corvinus_), are known to be either extinct or so rare that they have not been taken since the time of Kittlitz, who visited the island of Kusaie in December, 1827, and January, 1828. Other birds (_Anas oustaleti_, _Caloenas nicobarica_, _Megapodius l. lapérouse_, and _Metabolus rugensis_) have become reduced in numbers and may be threatened with extermination. Nelson (1921:270-274) has described the following agencies destructive to island life of the Pacific: fire, volcanic eruptions, tidal waves, hurricanes, clearing of the land, introduction of domestic animals and grazing, introduction of wild animals and birds. Mayr (1945c) also presents a discussion of conservation problems in these islands. Fire is a serious hazard to island life, especially to the land birds. It destroys both food and cover, these two habitat requirements being most essential to the birds. The firing of open lands to improve grazing conditions was a practice which persisted in the Marianas during the time of the Spanish. This practice has declined, but the resultant vegetational changes and erosion have adversely affected the avifauna. Tidal waves and hurricanes (typhoons) are occasionally of such intensity as to flood low coral atolls. Such events are damaging to, or might even exterminate populations of land birds (_Aplonis_, _Acrocephalus_ and others), and prevent colonizations which might otherwise occur. Clearing of the land for agricultural use probably has affected the avifauna, especially on the island of Tinian where much of the island has been placed in cultivation. The occurrence of domestic stock, especially feral hogs and cats, has affected the birds. Hogs, apparently, have been in the islands for a long time. The English privateer, Lord Anson, visited Tinian in October, 1742, and noted a large number of hogs present at that time. At Guam, in 1945, the NAMRU2 party found both hogs and cats moving freely in all parts of the island. Stomachs of cats examined showed that they had been feeding principally on rodents. Introduction of wild animals and plants have not been so extensive as in the Hawaiians or other islands. There have been at least five importations of land birds to Micronesia as well as several mammals, other vertebrates and invertebrates. The effect of these established colonies on the native bird life has not been studied. The late world war has brought changes to the population of bird life in Micronesia. The author (1946b) has elsewhere described some of the effects of the bombing, invasion, and occupation of small islands. Some islands, like Peleliu, suffered severely from bombing and invasion operations. Some islands, especially smaller ones like Kwajalein and Ulithi, were partly or almostly entirely cleared of vegetation by occupation forces. Other effects were caused by "recreational" shooting of birds by garrison forces; introductions of pests in materials unloaded; and pest control by clearing, draining, and spraying with DDT and other insecticides to the detriment of inoffensive species. It is obvious that a well-planned program of conservation should be placed in operation to insure survival of the endemic avifauna of Micronesia. THE FUTURE OF ORNITHOLOGICAL RESEARCH IN MICRONESIA Collections of birds have been made at most of the major islands of Micronesia, and it is thought that there are but few if any unnamed birds in the region. The distribution of several species has not been completely investigated, especially those land birds (_Ducula_, _Ptilinopus_, and _Aplonis_) which inhabit coral atolls in the Carolines and Marshalls. The bird life of the northern Marianas is also incompletely known. Continued observations in the Micronesian islands will increase our knowledge of the kinds of migratory shore birds and migratory land birds which reach the island as winter visitors. Further information is needed concerning the breeding activities of sea birds in Micronesia, especially in the Marshalls and Carolines. The systematic status of most of the birds in Micronesia is already established. It is hoped that the present account advances our knowledge of the methods of colonization. Although these fundamental investigations have been nearly completed in Micronesia the field of avian ecology has been relatively untouched. In the past, expeditions have visited Micronesia with the aim of obtaining within a short time collections of the animal life as large and as representative as possible. Many of the collectors made few or no field notes on the bird life; some, like Finsch, Kubary, Marche, and Coultas, made valuable observations on the habits of the birds. Intensive ecological researches may be accomplished more thoroughly by resident investigators, who can devote full time to such pursuits. METHODS AND ACKNOWLEDGMENTS My own opportunity to study the bird life of Micronesia came as a member of the scientific staff of the Laboratory of Mammalogy of United States Naval Medical Research Unit No. 2 (NAMRU2) in the late war. The primary duty of this laboratory was to obtain examples of the vertebrate fauna for examination for ectoparasites by the Laboratory of Acarology and to preserve specimens for identification. As a result sizeable collections of mammals, birds, and other vertebrates were obtained. In addition, ecological data were obtained (as time permitted), especially as an aid in studying the distribution of ectoparasites which affected man. In 1945, I spent eleven months in Micronesia; for most of this time I was stationed at Guam, the headquarters of the Unit, although one month was spent in the Palau Islands, two weeks were spent at Ulithi Atoll, and short stop-overs were made at Eniwetok and Kwajalein atolls. Other members of the laboratory staff visited Rota and Truk islands. Subsequent to the field studies in the Pacific, I was sent to Washington and spent approximately eight months at the United States National Museum studying the collections of birds and preparing several reports for publication. In this period other material was studied, both in the United States National Museum and at the American Museum of Natural History, New York, and the literature dealing with the birds of Micronesia was explored and a bibliography of Micronesian birds was prepared. At the University of Kansas, I continued the bibliographic work, borrowed and studied some specimens, and completed accounts of the avifauna of Micronesia. Under the account of each bird, all known references in the literature, which mention the scientific name of the bird and its distribution in Micronesia, are listed. The references are arranged as follows: (1) citation to the original description, and (2) citations to names in literature in the order of their first appearance. When a name is a pure synonym, it may be recognized as such by the fact that the type locality is given immediately following the citation. In compiling these references the writer made use of the invaluable work by Wiglesworth (1891) and of Utinomi's "Bibliographica Micronesia," made available through the translation by Fisher (1947). The arrangement of the families follows that of Peters (1931-1945) and Wetmore (1940). Specimens examined are designated as to collection in which catalogued by the following abbreviations: USNM, the United States National Museum; AMNH, the American Museum of Natural History; MCZ, the Museum of Comparative Zoölogy; and KMNH, the University of Kansas Museum of Natural History. Average and extreme measurements of specimens are usually listed in tables; unless otherwise indicated, measurements are in millimeters, and are of adult specimens. The wings have been measured by flattening them on a ruler. Weights are in grams. Unless otherwise indicated, descriptions of the birds have been written by the author. Descriptions of shore birds are not given; for these the reader may refer to Mayr (1945a:28-47) where characters useful for identification of the birds in the field also are given. The writer is especially indebted to Dr. Ernst Mayr for making available the descriptions of Micronesian birds made by Miss Cardine Bogert, especially those dealing with color of the irides, feet, and bill. Color terms in quotation marks refer to those in Ridgway (1912). In dealing with insular forms the criterion of intergradation as indicative of subspecies cannot be applied as it can in kinds of birds on the mainland which have geographically continuous distributions. Instead, degree of difference in combination with geographic position plus other factors such as degree of variation in the geographic races of the same species or a related species on continental areas are used in deciding whether two closely related kinds are subspecies or full species. Many kinds of birds in the islands are modified but little from island to island (examples, _Rhipidura rufifrons_, _Aplonis opacus_, _Ducula oceanica_, and _Myzomela cardinalis_), and can be treated as subspecies. Others show much variability from island to island and it is uncertain whether they should be treated as subspecies or as separate species (examples, _Myiagra oceanica_, _Zosterops cinerea_, _Rukia_, and possibly _Acrocephalus luscinia_). Decisions on generic status are equally difficult to make. In many cases the experience and judgment of the taxonomist may be the only criteria by which he can decide whether a bird is different enough to be considered as a distinct genus. This "human element" has caused some disagreement. Knowing whether the bird is to be considered as a distinct genus or instead merely as a species may not be as important as knowing its correct phylogenetic relationship. The circumstance that variation in these insular birds is in general less predictable than in mainland birds adds, I think, to the pleasure inherent in the classification of the variations. First, I thank Commodore Thomas N. Rivers (MC) USNR, then commanding officer of NAMRU2, for the opportunity to join the Unit, for his interested cooperation in seeing that the plans for field trips were successful, and for his thoughtfulness in obtaining for me the orders for duty at the United States National Museum subsequent to our field investigations. Greatly appreciated also is the help rendered by my former colleagues of NAMRU2, including Dr. David H. Johnson, Dr. George W. Wharton, Dr. Aaron B. Hardcastle, Mr. Odis A. Muennik, Mr. L. P. McElroy, Mr. Charles O. Davison, Mr. Merle H. Markley, Mr. Walter L. Necker, Dr. Wilbur G. Downs, Dr. Bernard V. Travis, and Mr. E. W. Coleman. Other personnel, then stationed in Micronesia, who contributed data used in this report include: Dr. Joe T. Marshall, Jr., (who generously loaned some of the specimens taken by him in Micronesia), Dr. C. K. Dorsey, Dr. George Hensel, Mr. Tom Murray, Dr. Irwin O. Buss, Mr. James O. Stevenson, Dr. Wilfred D. Crabb, Mr. Herbert Wallace, and Dr. M. Dale Arvey. Authorities of the United States National Museum provided generously for using the collections there, and I am especially grateful to Dr. Alexander Wetmore, Dr. Herbert Friedman, and Mr. Herbert G. Deignan for their cooperation and assistance. Doctor Wetmore kindly made available many of the birds collected at Bikini during the atomic bomb experiments. Dr. Robert Cushman Murphy, Dr. Ernst Mayr, and Dr. Dean Amadon of the American Museum of Natural History made available the collections in their charge. Doctor Murphy allowed me to examine some of the heretofore unstudied collections of sea birds of the Whitney South Sea Expedition. Doctor Mayr generously helped me with taxonomic and evolutionary problems and made available to me some of his own unpublished taxonomic notes, the unpublished field accounts of Mr. William F. Coultas and a partly completed manuscript on the birds of Micronesia by Miss Cardine Bogert. Mr. James L. Peters generously loaned specimens from the Museum of Comparative Zoölogy. The use of unpublished field notes made by Mr. Larry P. Richards at Ponapé and Truk in 1947 and 1948 is also gratefully acknowledged. I am grateful also to my colleagues at the Museum of Natural History of the University of Kansas and would single out for special mention Dr. E. Raymond Hall who gave critical assistance with the manuscript, Drs. Edward H. Taylor and Herbert B. Hungerford who made helpful suggestions, and Mrs. Virginia Cassell Unruh who drew the distributional maps. ACCOUNTS OF THE KINDS OF BIRDS OF MICRONESIA =Diomedea nigripes= Audubon Black-footed Albatross _Diomedea nigripes_ Audubon, Ornith. Biog., 5, 1839, p. 327. (Type locality, Pacific Ocean, lat. 30°44´N., long. 146°W.) _Diomedea fuliginosa_ Oustalet, Le Nat., 1889, p. 261 (Mariannes). _Diomedea nigripes_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris (3), 8, 1896, p. 51 (Agrigan); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus. 1, 1901, p. 22 (Marianas); Safford, Osprey, 1902, p. 70 (Mariannes); _idem_, The Plant World, 7, 1904, p. 268 (Guam?); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 32 (Marriane); Peters, Check-list Birds World, 1, 1931, p. 43 (Marshalls); Hand-list Japanese Birds, rev., 1932, p. 188 (Marianas); Hand-list Japanese Birds, 3rd ed., 1942, p. 210 (Marianas); Mayr, Birds Southwest Pacific, 1945, p. 5 (Marshalls). _Geographic range._--North Pacific Ocean. Breeds on islands northwest of Hawaii. In Micronesia: Mariana Islands--Agrigan. _Characters._--A large oceanic bird with sooty-brown coloration; darker on nape, wings and tail; lighter on forehead, sides of head, and abdomen; area surrounding bill whitish; tail whitish at base; bill dark reddish-brown; feet black. _Remarks._--This albatross has been recorded from waters near the Mariana Islands. Quoy and Gaimard (1824:145) observed "albatross" between the Mariana and the Hawaiian Islands. The only actual specimens obtained from the islands were reported on by Oustalet (1896:51). These were eight Black-footed Albatrosses which were taken on the coast of Agrigan by Marche in December, 1888, and January, 1889. Oustalet gives the following measurements: total length, 680-785; wing, 485-525; tail, 180-225; tarsus, 80-90; culmen, 108-125. The specimens are apparently in the Paris Museum. Peters (1931:43) lists the Marshall Islands as part of the range of _D. nigripes_. In the period of the late war Gleise (1945:221) observed eight Short-tailed Albatrosses (_D. albatrus_ Pallas) "off Saipan." Specimens of _D. albatrus_ have not been taken in Micronesia. According to Austin (1948b:32) this albatross "is now virtually extinct," and this record may be questioned. =Puffinus pacificus chlororhynchus= Lesson Wedge-tailed Shearwater _Puffinus chlororhynchus_ Lesson, Traité d'Ornith., 8, 1931, p. 613. (Type is from Shark's Bay, West Australia.) _Puffinus sphenurus_ Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 299 (Mortlock). _Puffinus chlororhynchus_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 80 (Luganor?); Godman, Monogr. Petrels, pt. 2, 1908, p. 88 (Carolines); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 33 (Luganor or Ruk?). _Puffinus pacificus chlororhynchus_ Hand-list Japanese Birds, rev., 1932, p. 187 (Lukunor or Truk?, Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 209 (Lukunor or Truk?, Kusaie). _Geographic range._--Breeds at the Seychelles, Australia, Lord Howe, Norfolk, and other islands in the Australian area. Ranges throughout most of the warmer parts of the Indian and Pacific oceans. In Micronesia: Mariana Islands--Guam; Caroline Islands--Lukunor or Truk?, Kusaie. _Characters._--A large shearwater with long wedge-shaped tail; upper parts sooty-brown with crown, neck, and wings darker and forehead paler; under parts paler than upper parts; bill dark; feet flesh-colored. _Remarks._--This shearwater was taken by Kubary either at Lukunor or at Truk in the Caroline Islands. At a later date, apparently between 1922 and 1932, the Japanese recorded the bird at Kusaie. In using this subspecific name, I am following the Hand-list of Japanese Birds (Hachisuka _et al._, 1932:187). At Guam on August 10, 1931, Coultas obtained a male shearwater, which is tentatively placed in this subspecies. Its measurements are as follows: wing, 290; tail, 128; exposed culmen, 39; tarsus, 47. Coultas (field notes) writes that he was told by natives that petrels nest and roost on the high cliffs behind the city of Agaña on Guam. At sea south of the eastern Caroline islands, Coultas obtained five other birds which appear to be the same as the bird from Guam. All specimens are in the collections of the American Museum of Natural History. =Puffinus pacificus cuneatus= Salvin Wedge-tailed Shearwater _Puffinus cuneatus_ Salvin, Ibis, 1888, p. 353. (Type locality, Krusenstern Island==Ailuk, Marshall Islands, _fide_ Fisher, Auk, 63, 1946, pp. 587-588.) _Puffinus cuneatus_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 80 (Krusenstern); Salvin, Cat. Birds British Mus., 25, 1896, p. 371 (Krusenstern); Godman, Monogr. Petrels, pt. 2, 1908, p. 76 (Marshalls). _Puffinus pacificus cuneatus_ Mathews, Birds Australia, 2, 1912, p. 84 (Marshall Group); Peters, Check-list Birds World, 1, 1931, pp. 55-56 (Krusenstern); Hand-list Japanese Birds, 3d ed., 1942, p. 209 (Krusenstern); Fisher, Auk, 63, 1946, pp. 587-588 (Ailuk). _Thyellodroma cuneata cuneata_ Mathews and Iredale, Ibis, 1915, p. 597 (Krusenstern); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 113 (Marshall Group). _Thyellodroma cuneata_ Oberholser, Auk, 34, 1917, p. 474 (Krusenstern). _Thyellodroma pacificia cuneata_ Mathews, Novit. Zool., 39, 1934, p. 186 (Caroline Islands). _Geographic range._--Pescadores east to the Hawaiian Islands and south to eastern Micronesia. In Micronesia: Marshall Islands--Ailuk. _Remarks._--Osbert Salvin received two specimens of this shearwater from H. J. Snow, who got them at the Krusenstern Islands in 1883. In describing them, Salvin (1888:353) comments that the locality is seemingly in the Marshall Islands at approximately 10°17´ N. and 190° W. This locality was confusing to Seebohm (1891:191) who thought it was between the Hawaiians and the Marshalls, while Hartert (1926:352) decided it was really Krusenstern Rocks in the Hawaiian Group. To clear the matter up, Fisher (1946:587-588) writes that Salvin was correct and suggests that the name of the island should be the better established one, Ailuk, rather than the little used one, Krusenstern. _P. p. cuneatus_ resembles _P. p. chlororhynchus_ but is whiter on the underparts, especially the breast. These two subspecies are inseparable according to the twenty-fourth supplement to the American Ornithologists' Union Check-list of North American Birds (Auk, vol. 66, 1949:281). =Puffinus tenuirostris= (Temminck) Short-tailed Shearwater _Procellaria tenuirostris_ Temminck, Pl. Col., livr. 99, 1835, text to pl. 587. (Type locality, Seas north of Japan and shores of Korea.) _Puffinus tenuirostris tenuirostris_ Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam). _Puffinus tenuirostris_ Yamashina, Tori, 10, 1940, p. 677 (Kinajon, Marshall Islands); Hand-list Japanese Birds, 3d ed., 1942, p. 210 (Kinajon, Marshall Islands). _Geographic range._--Breeds in Tasmania, southeastern Australia, islands in Bass Straits, and Bounty Islands. Ranges north to the Bering Sea. In Micronesia: Mariana Islands--Guam?; Marshall Islands--Kinajon. _Character._--A rather large shearwater with short, rounded tail; upper parts sooty brown; underparts paler and more grayish than back; throat may be occasionally whitish; bill lead-gray; feet grayish, browner on outer side. _Remarks._--On migration this shearwater probably reaches most parts of Micronesia. It has been recently recorded by the Japanese at Kinajon in the Marshall Islands. Bryan (1936:15) includes this species as a "chance arrival" in his list of the birds of Guam. =Puffinus nativitatis= Streets Christmas Shearwater _Puffinus (Nectris) nativitatis_ Streets, Bull. U. S. Nat. Mus., 7, 1877, p. 29. (Type locality, Christmas Island, Pacific Ocean.) _Puffinus nativitatis_ Salvin, Cat. Birds British Mus., 25, 1896, p. 389 (Krusenstern); Lister, Proc. Zool. Soc. London, 1891, pp. 295-300 (Krusenstern); Godman, Monogr. Petrels, pt. 3, 1908, p. 153 (Marshalls). _Geographic range._--Breeds at Wake and Laysan Islands south to Christmas, Phoenix, Marquesas, Tuamotu, and Austral Islands. In Micronesia: Marshall Islands--Ailuk. _Characters._--Upper parts chocolate brown; underparts resemble upper parts but throat may be slightly grayer; bill and feet black. _P. nativitatis_ resembles _P. pacificus_ but is similar with black feet. _Remarks._--The only specimens of this bird known from Micronesia, are those taken in the spring of 1883 by H. J. Snow at Krusenstern (Ailuk) in the Marshall Islands. For two birds from this island in the collections of the British Museum, Godman (1908:154) gives the following measurements: wing, 9.6 and 10.0; tail, 3.35 and 3.4; culmen, 1.15 and 1.2; tarsus, 1.7 and 1.8; middle toe and claw, 2.0 and 2.1. =Puffinus lherminieri dichrous= Finsch and Hartlaub Dusky Shearwater _Puffinus dichrous_ Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 244. (Type locality, McKean Island, Phoenix Group.) _Puffinus dichrous_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 108 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 6, 44 (Palau). _Puffinus opisthomelas_ var. _minor_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 832 (Type locality, Pelew); Finsch, Journ. f. Ornith., 1872, p. 57 (Pelew). _Puffinus opisthomelas_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); Finsch, Journ. f. Ornith., 1870, p. 371 (Pelew). _Puffinus tenebrosus_ Pelzeln, Ibis, 1873, p. 47, fig. 1 (Type locality, unknown==Pelew Islands, _ex_ Mathews); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 55 (Rota); Hartert, Novit. Zool., 5, 1898, p. 69 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 23 (Marianas?); Safford, The Plant World, 7, 1904, p. 268 (Guam). _Puffinus obscurus_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 40 (Ponapé, Palau); _idem_, Proc. Zool. Soc. London, 1877, p. 786 (Palau); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 782 (Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 295, 309 (Ponapé, Kuschai); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, p. 109 (Kuschai); _idem_, Ibis, 1881, pp. 113, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk); Salvin, Ibis, 1888, p. 357 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 79 (Ruk, Ponapé, Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 54 (Saypan, Palaos); Salvin, Cat. Birds British Mus., 25, 1896, p. 382 (Carolines, Pelews); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 23 (Marianas?); Safford, Osprey, 1902, p. 70 (Marianas); Dubois, Syn. Avium, 2, 1904, p. 1031 (Pelew, Carolines); Godman, Monogr. Petrels, pt. 2, 1908, pp. 126, 127 (Pelew, Ruk, Ponapé). _Puffinus obscurus obscurus_ Hartert, Novit. Zool., 7, 1900, p. 10 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 32 (Saipan, Ruk, Ponapé, Pelew). _Puffinus lherminieri minor_ Mathews, Birds Australia, 2, 1912, p. 70 (Pelew, Carolines). _Puffinus assimilis minor_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 111 (Pelew). _Puffinus lherminieri dichrous_ Murphy, Amer. Mus. Novit., no. 276, 1927, p. 10 (Pelews, Carolines); Peters, Check-list Birds World, 1, 1931, p. 60 (Pelew); Yamashina, Tori, 7, 1932, p. 408 (Arakabesan); Hand-list Japanese Birds, rev., 1932, p. 188 (Saipan, Truk, Ponapé, Palaus); Hand-list Japanese Birds, 3rd ed., 1942, p. 209 (Saipan, Truk, Ponapé, Palau); Mayr, Birds Southwest Pacific, 1945, p. 10 (Carolines, Palaus); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 37 (Palau). _Alphapuffinus lherminieri minor_ Mathews, Novit. Zool., 39, 1934, p. 182 (Pelew Islands). _Puffinus obscura_ Bryan, Guam Rec., vol. 13, No. 2, 1936, p. 15 (Guam). _Geographic range._--Known from Phoenix, Nauru, Micronesia, and south to the Samoan, Society, Tuamotu, and Marquesas islands. In Micronesia: Mariana Islands--Guam, Rota, Saipan; Palau Islands--Babelthuap, Koror, Arakabesan; Caroline Islands--Truk, Ponapé, Kusaie. _Characters._--A small shearwater with upper parts sooty-black; under parts white except for sides of breast grayish and under tail-coverts blackish; bill blackish; feet yellowish, outer toe black. _Measurements._--Measurements of 17 adult birds (9 males, 7 females, 1 unsexed) from Micronesia (Palau, Truk, Ponapé, Kusaie) and 10 adult birds (6 males, 4 females) from the Phoenix Group (Enderbury, Canton) are listed in table 14. TABLE 14. MEASUREMENTS OF _Puffinus lherminieri dichrous_ ===========+=============+============+==============+============== LOCALITY | Wing | Tail |Exposed culmen| Tarsus -----------+-------------+------------+--------------+-------------- Micronesia |203 (197-211)|83.6 (77-89)| 27.9 (26-30) |38.5 (37.5-40) Phoenix |197 (193-203)|82.2 (79-85)| 26.3 (25-28) |37.2 (36-39) -----------+-------------+------------+--------------+-------------- _Specimens examined._--Total number, 72 (44 males, 19 females, 9 unsexed), as follows: Palau Islands, AMNH--exact locality not given, 64 (Oct., Nov., Dec.); Caroline Islands, AMNH--Truk, 4 (June 15, 16)--Ponapé, 3 (undated)--Kusaie, 1 (April 25). _Nesting._--The Dusky Shearwater in Micronesia nests in holes on high, and usually isolated, coral cliffs. Owston's collectors, according to Hartert (1900:10), found a nest with one egg at Truk on June 16. The nest was in a hole four feet deep in the side of a cliff. The egg is white and measures 42 × 35. Yamashina (1932a:408) records the taking of one egg at Arakabesan, Palau Islands, on May 26. Coultas (field notes) gives an interesting account of nesting activities of this shearwater at the Palau Islands. He found the bird nesting on small islands of the group from October to December, 1931; however, he states that the natives told him that the bird nests throughout the year. Land crabs and shearwaters were often found together in the same burrow. Apparently the adult birds did not remain in the burrow with the young during the day. At Kusaie, Coultas was told by the natives that the adult birds were caught by tying the mandibles of the young together. When the parent birds approached and hovered over the young birds expecting their mouths to open, the natives had the opportunity to strike them down with clubs. Coultas collected six downy nestlings at Palau in November and December. _Remarks._--The first published account of this shearwater in Micronesia was apparently by Kittlitz (1858, pt. 1:358) when he recorded his "Schwärzlicher Sturmvogel" at Kusaie, according to Wiglesworth (1891a:79). Finsch (1875:44 and 1881b:113, 115) studied specimens taken by Tetens, Heinsohn, and Kubary at the Palau Islands and those taken by Kubary at Ponapé. Earlier, Hartlaub (1868:832) used some of these specimens from the Palau Islands to describe his _Puffinus opisthomelas_ var. _minor_, which was destined to be placed in synonymy (Murphy, 1927:10). Oustalet (1896:54, 55) recorded specimens taken by Marche at Saipan in May, 1887, and at Rota in July, 1888. Oustalet referred to them as _P. obscuras_ and _P. tenebrosus_, respectively. T. W. Gulick obtained undated skins at Ponapé. Hartert (1900:10) reported on specimens taken by Owston's collectors at Truk. In 1931, Coultas with the Whitney South Sea Expedition took one shearwater at Kusaie and a series of 64 skins at the Palau Islands. He failed to find birds at Ponapé and wrote that their scarcity there may have been due to persistent hunting of them by the inhabitants of the island. The NAMRU2 party obtained no information concerning the birds at Guam, Rota, or Truk, but at the Palau Islands observed shearwaters at sea approximately 6 miles east of Babelthuap Island on September 2, 1945. Murphy (1927:6-15) revised the shearwaters of the _Puffinus lherminieri_ group, and recognized several subspecies. _P. l. dichrous_ was assigned a range consisting of Micronesia, the Phoenix Islands, and Nauru Island. The breeding range of _P. l. polynesiae_ was given as the Samoan, Society, Tuamotu and Marquesas islands. Color differences between the two subspecies are very slight, and he separated them on the basis of the length of the exposed culmen as follows: _P. l. dichrous_ 22.6-27 (26) in _P. l. polynesiae_ 25.5-30 (28.9). In other measurements they closely resembled one another. At the time of his study, Murphy did not have the shearwaters from Micronesia collected by Coultas and actually did not have a large series from these islands. On studying this new material, I find the length of the exposed culmen of 17 adult birds from Micronesia (including 12 from the Palaus) to be 26-30 (27.9). In comparison with Murphy's findings, my measurements of Micronesian birds fall almost midway between the measurements which he recorded as characteristic of _P. l. dichrous_ (from the Phoenix Islands) and _P. l. polynesiae_. The intermediate position of the measurements of the Micronesian birds, together with the absence of other distinguishing characters, suggests that these shearwaters belong to only one subspecies which consists of a group of isolated and variable populations. Unless the old specific name, _obscuras_ of Gmelin, is revived, the name for the entire group in Micronesia and Polynesia would be _P. l. dichrous_. I agree with Murphy that the Bonin form, _P. l. bannermani_, is a well-defined subspecies. =Pterodroma rostrata rostrata= (Peale) Tahiti Petrel _Procellaria rostrata_ Peale, U. S. Expl. Exp., 8, 1848, p. 296. (Type locality, Mountains about 6,000 feet on Tahiti, Society Islands.) _Procellaria desolata_ Pucheran, Voy. Pôle Sud, 3, 1853, p. 138 (des îles Carolines); Hartlaub, Journ. f. Ornith., 1854, p. 168 (Carolinen). _Procellaria (Aestrelata) desolata_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 55 (Caroline Islands). _Oestrelata rostrata_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 82 (Caroline Is.); Godman, Monogr. Petrels, pt. 3, 1908, p. 190 (Caroline Is.). _Pterodroma rostrata_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 33 (Carolines). _Pterodroma rostrata_ subsp. (?) Hand-list Japanese Birds, rev., 1932, p. 188 (Carolines); Hand-list Japanese Birds, 3d ed., 1942, p. 210 (Carolines). _Geographic range._--Known to breed on the Society and Marquesas Islands. In Micronesia: Caroline Islands--exact locality unknown. _Characters._--A large petrel with blackish-brown plumage except for belly and under tail-coverts white and throat, upper breast and flanks pale brown; bill black; legs yellowish; feet black. This oceanic bird differs from other petrels and shearwaters of Micronesia by the presence of a white abdomen in contrast with dark plumage on upper parts, throat, and breast. _Remarks._--A petrel which is referred to this subspecies has been taken once in Micronesia, by Hombron and Jacquinot in the Caroline Islands. It may be pointed out that the subspecies _P. r. becki_ Murphy is known from the sea east of the Bismarck Archipelago and might range into Micronesian waters. =Pterodroma hypoleuca hypoleuca= Salvin Stout-billed Gadfly Petrel _Oestrelata hypoleuca_ Salvin, Ibis, 1888, p. 359. (Type locality, Krusenstern Island = Ailuk, Marshall Islands, _fide_ Fisher, Auk., 63, 1946, pp. 587-588). _Oestrelata hypoleuca_ Salvin, Cat. Birds British Mus., 25, 1896, p. 409 (Krusenstern); Godman, Monogr. Petrels, pt. 3, 1908, p. 212 (Krusenstern). _Cookilaria hypoleuca hypoleuca_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 122, (Marshall Group). _Pterodroma leucoptera hypoleuca_ Hand-list Japanese Birds, rev., 1932, p. 188 (Marshalls); Hand-list Japanese Birds, 3d ed., 1942, p. 210 (Krusenstern); Fisher, Auk, 63, 1946, pp. 387-388 (Ailuk). _Pterodroma hypoleuca hypoleuca_ Mayr, Birds Southwest Pacific, 1945, p. 11 (Micronesia). _Geographic range._--Ranges from the Bonins east to the Hawaiians and south to Micronesia. In Micronesia: Marshall Islands--Ailuk. _Characters._--Upper parts grayish except for forehead whitish, crown and nape sooty-black; underparts whitish except for sides of breast sooty-black; legs and feet flesh color except for tips of toes and webs which are black. _Remarks._--In Micronesia, this petrel is known only from the type locality, Krusenstern or Ailuk, Marshall Islands. Fisher (1946: 587-588) has corrected the confusion regarding the exact position of this type locality. =Phaëthon aethereus mesonauta= Peters Red-billed Tropic-bird _Phaëthon aethereus mesonauta_ Peters, Occ. Papers Boston Soc. Nat. Hist., 5, 1930, p. 261. (Type locality, Swan Key, Almirante Bay, Panama.) _Phaeton aethereus_ Finsch, Ibis, 1880, pp. 329, 333, (Ratak Chain, Marshalls); _idem_, Journ. f. Ornith., 1880, p. 310 (Kuschai); _idem_, Ibis, 1881, p. 109 (Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 73 (Kushai, Marshalls); Ogilvie-Grant, Cat. Birds British Mus. 26, 1898, p. 457 (Kushai, Marshalls); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 34 (Kusaie, Marshall Islands). _Phaethon aethereus [?mesonauta]_ Hand-list Japanese Birds, rev., 1932, p. 187 (Kusaie, Marshalls); Hand-list Japanese Birds, 3d ed., 1942, p. 208 (Kusaie, Marshall Islands). _Geographic range._--Tropical parts of Atlantic and eastern Pacific from Cape Verde Islands west to Panama and Galapagos Islands. In Micronesia: Caroline Islands--Kusaie; Marshall Islands--Ratak Chain. _Characters._--Adult: A large, white sea bird with a long white tail; dorsal surface marked with blackish, transverse vermiculations; bill red; tarsus and foot flesh-colored with a yellowish hue, with plantar surface grayish. Immature: Resembles adults but dark transverse bars are broader; crown blacker; bill yellow. _Remarks._--No specimens have been examined. The Red-billed Tropic-bird is placed in the list of birds known from Micronesia on the basis of two observations by the German ornithologist, Otto Finsch. It has not been reported since his time, and may be considered as an unusual record for the area. I am following the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:208) in assigning the bird to the subspecies, _P. a. mesonauta_. =Phaëthon rubricauda rothschildi= (Mathews) Red-tailed Tropic Bird _Scaeophaethon rubricauda rothschildi_ Mathews, Birds Australia, 4, 1915, p. 303. (Type locality, Laysan and Niihau.) _Phaeton rubricaudus_ Finsch, Journ. f. Ornith., 1880, p. 296 (Carolines); _idem_, Ibis, 1881, p. 115 (Ponapé). _Phaeton rubricauda_ Finsch, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 73 (Ruk, Ponapé, Marshalls). _Phaeton rubricauda_ Ogilvie-Grant, Cat. Birds British Mus., 26, 1898, p. 451 (Caroline Islands); Hartert, Novit. Zool., 7, 1900, p. 11 (Ruk); Hand-list Japanese Birds, rev., 1932, p. 187 (Pagan, Truk, Ponapé, Marshalls). _Scaeophaethon rubricauda_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 34 (Mariannes, Ruk, Ponapé, Marshalls). _Phaethon rubricauda rothschildi_ Yamashina, Tori, 7, 1932, p. 406 (Pagan); _idem_, Tori, 10, 1940, p. 676 (Maug). _Phaethon rubricaudus rothschildi_ Hand-list Japanese Birds, 3d ed., 1942, p. 209 (Maug, Pagan, Truk, Ponapé, Marshalls). _Geographic range._--Bonin and Hawaiian islands south to Micronesia. In Micronesia: Mariana Islands--Maug, Pagan; Caroline Islands--Truk, Ponapé; Marshall Islands--exact locality unknown. _Characters._--Adult: Long-tailed sea bird white with pinkish tint except for black lores and eye streak; black shafts on feathers of secondaries, flanks, and tail coverts; black bases on feathers of head; central tail feathers elongate with black shafts and bright red webs; bill orange-red with black nasal streak; tarsus and foot bluish-yellow, distal part blackish. Immature: Resembles adult but barred with black above; bill blackish. _Measurements._--Yamashina (1940:676) lists the measurements for seven adult birds from Maug in the northern Marianas as wing 304-319 and exposed culmen 55-62. _Nesting._--Yamashina (1932a:406) reports the taking of one egg at Pagan in the Marianas on February 15, 1931. _Remarks._--The Red-tailed Tropic Bird has been recorded from the Mariana, Caroline, and Marshall Islands. On the basis of our present knowledge it appears to be uncommon in most of Micronesia and may be established as a resident bird only in the northern Marianas, as shown by Yamashina (1932a:406 and 1940:676), Coultas obtained an immature male at 3° N and 158° E, which is at a point in the ocean south of the eastern Carolines. Possibly this bird and others obtained in the Carolines are representatives of the subspecies, _P. r. melanorhynchos_ Gmelin, which is known from the Palmerston, Society and Turtle islands. =Phaëthon lepturus dorotheae= Mathews White-tailed Tropic Bird _Phoethon lepturus dorotheae_ Mathews, Austr. Avium. Rec., 2, 1913, p. 7. (Type locality, Queensland.) _Phaeton candidus_ Kittlitiz, Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, p. 382 (Ualan); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); Finsch, Journ. f. Ornith., 1872, p. 57 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 114 (Pelew, Ualan); Finsch, Journ. Mus. Godeffroy, 1875, pp. 6, 47 (Palau); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 782 (Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 296, 309 (Ponapé, Kuschai); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); Schmeltz and Krause, Ethnogr. Abth. Mus., Godeffroy, 1881, pp. 281, 299, 330, 353 (Ponapé, Mortlock, Nukuor, Ruk); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 52 (Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 73 (Pelew, Ruk, Luganor, Nukuor, Ponapé, Ualan, Marshalls); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 62 (Agrigan, Palaos, Ruk, Kushai, Marshalls); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne). _Phaeton flavirostris_ Finsch, Ibis, 1880, pp. 329, 333 (Ratak Chain); _idem_, Ibis, 1881, pp. 105, 109, 115 (Kuschai, Ponapé). _Phaethon candidus_ Salvadori, Ornith. Papuasia, 3, 1882, p. 426 (Pelews, Carolines, Marshalls); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 23 (Agrigan); Safford, Osprey, 1902, p. 70 (Mariannes); Takatsukasa and Kuroda, Tori, 1, 1915, p. 50 (Pelew, Ponapé); Uchida, Annot. Zool. Japon., 9, 1918, pp. 489, 492 (Palau). _Phaëthon lepturus_ Ogilvie-Grant, Cat. Birds British Mus., 26, 1898, p. 453 (Pelew, Carolines, Marshalls); Hartert, Novit. Zool., 7, 1900, p. 10 (Ruk); Safford, The Plant World, 7, 1904, p. 268 (near Guam); _idem_, Contr. U. S. Nat. Herb., 9 1905, p. 80 (northern Marianas); Mayr, Birds Southwest Pacific, 1945, p. 17 (Palau); Strophlet, Auk, 63, 1946, p. 535 (Guam); Borror, Auk, 64, 1947, p. 416 (Agrihan); Stott, Auk, 64, 1947, p. 524 (Saipan). _Phaeton lepturus_ Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln). _Leptophaethon lepturus dorothea_ Mathews, Birds Australia, 4, 1915, p. 309 (Pelew). _Phaethan lepturus_ Cox, Island of Guam, 1917, p. 22 (northern Marianas). _Leptophaethon lepturus lepturus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 33 (Agrigan, Saipan, Pelew, Ruk, Luganor, Nukuor, Ponapé, Kusaie, Marshalls). _Phaethon lepturus dorotheae_ Yamashina, Tori, 7, 1932, p. 407 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 187 (Agrigan, Pagan, Saipan, Agiguan, Palaus, Truk, Luganor, Nukuor, Ponapé, Kusaie, Marshalls); Hand-list Japanese Birds, 3d ed., 1942, p. 209 (Agrigan, Pagan, Saipan, Agiguan, Babelthuap, Koror, Urukthapel, Angaur, Unusuto, Truk, Luganor, Nukuor, Ponapé, Kusaie, Namorik); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 38 (Guam, Peleliu, Ulithi, Truk). _Geographic range._--Islands in the southwestern Pacific area. In Micronesia: Mariana Islands--Agrigan, Pagan, Saipan, Agiguan, Rota, Guam; Palau Islands--Babelthuap, Koror, Urukthapel, Peleliu, Anguar, Unusuto; Caroline Islands Truk, Ulithi, Luganor, Nukuor, Ponapé, Kusaie; Marshall Islands--Namorik. _Characters._--Adult: White often with pinkish shade but lores and eye streak black; feathers of head, flanks and under tail-coverts with bases black; black on outer and subterminal part of inner webbing of primaries; black, subterminal coloring on scapulars and secondaries; black on shafts of elongated tail plumes; bill horn yellow, dark basally; tarsus dark yellow; feet blackish. Immature: Resembles adult but upper parts barred with black, bill black on terminal part. _Measurements._--Measurements of adult birds from Micronesia are given in table 15. _Weights._--The NAMRU2 party recorded weights of five adult males from Guam as 294 (267-321) grams. TABLE 15. MEASUREMENTS OF _Phaëthon lepturus_ FROM MICRONESIA ---------------------------+-----+---------+--------+---------+------- | | | | Exposed | | No. | Wing | Tail | culmen | Tarsus ---------------------------+-----+---------+--------+---------+------- Marianas: Asuncion, Guam | 6 | 264 | 107 | 47 | 21 | | 256-287 | 97-117 | 44-50 | 20-21 | | | | | Palaus: Peleliu | 11 | 257 | 108 | 45 | 21 | | 242-270 | 98-122 | 40-49 | 19-21 | | | | | Carolines: Ponapé, Kusaie | 11 | 261 | 105 | 47 | 21 | | 252-271 | 97-114 | 44-49 | 21-22 +-----+---------+--------+---------+------- Total: Micronesia | 28 | 260 | 107 | 46 | 21 | | 242-287 | 97-122 | 40-50 | 19-22 ---------------------------+-----+---------+--------+---------+------- _Specimens examined._--Total number, 37 (22 males, 10 females, 5 unsexed), as follows: Mariana Islands, USNM--Guam, 5 (June 11, July 21); AMNH--Asuncion, 1 (June?); Palau Islands, USNM--Peleliu, 5 (Aug. 29, 31, Sept. 5, 6); AMNH--exact locality not given, 7 (Oct. 13, 26, Nov. 15, 23, Dec. 18); Caroline Islands, AMNH--Ponapé, 9 (Dec. 8, 9, undated)--Kusaie, 10 (March 1-8, April). _Nesting._--The NAMRU2 party observed nests of the White-tailed Tropic Bird at Peleliu in August and September, 1945. Several nests were seen in hollows of the Australian pine (_Casuarina equisetifolia_) between 20 and 30 feet above the ground. Birds could be seen in the nest hollows because the plumes of their long tail usually extended well out of the entrance. One nest was found in a dead tree in a battle-cleared area; others were observed in jungle habitat. Coultas observed nesting at Ponapé between November 1 and December 30, 1930, and found nests in the tops of trees and in hollow trees; a few were observed in holes in cliffs. Yamashina (1932a:407) records the taking of one egg at Ponapé on August 18, 1931. At Guam the NAMRU2 party found birds along the high cliffs which edge the beach. There was no evidence that they were nesting from May to July; nevertheless males taken in June had enlarged gonads. The bird is known to breed at Namorik in the Marshall Islands, according to the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:209). _Food habits._--The NAMRU2 party found small fish in the stomachs of these birds taken at Peleliu. _Parasites._--Uchida (1918:489, 492) records the bird lice (Mallophaga), _Colpocephalum epiphanes_ and _Menopon eulasius_, from the White-tailed Tropic Bird from Palau. _Remarks._--Birds taken in Micronesia differ only slightly from those from other areas in Oceania. Within Micronesia (see table 15) the birds from the Palaus have the shortest wing and shortest exposed culmen. The White-tailed Tropic Bird appears more numerously in western and northern Micronesia than in the Marshall Islands. This distribution may be correlated with a preference for the "high" islands; especially those which have rocky cliffs, including Guam, Rota, Peleliu, Angaur, and Truk. Reports were received in 1945 that the birds were only infrequently seen at Ulithi, a low atoll. Stott (1947:524) observed birds flying into rocky crevices at Saipan on December 18. Gleise (1945:221) also recorded the bird in the vicinity of Saipan. Borror (1947:416) reports seeing birds at Agrigan on July 29, August 5 and 6, 1945. Coultas (field notes) found tropic birds common at Ponapé in November and December, 1930, in forested regions and along the cliffs. He made similar observations at Kusaie and Palau. At Ponapé and Palau, Coultas noted the use of the eggs, young and adults as food by the natives. At Palau the plumes are used in headdresses worn by the natives, the birds being taken with the blowgun. Murphy (1936:807) states that the principal enemy of the White-tailed Tropic Bird at Bermuda is the introduced rat (_Rattus rattus_). Introduced rats, particularly _Rattus mindanensis_ on Guam, may prey on the nesting birds. Baker (1946c:404) writes that this rat is a good climber and may spend considerable time in trees. The rat was trapped also in rough coral jungle at the edge of the cliffs, where tropic birds, Micronesian Starlings and other species, may have been nesting. Little has been recorded concerning the post-breeding season wanderings of these tropic birds in Micronesia. They seemingly spend considerable time at sea, but whether they move as far from their breeding areas as do birds in the Atlantic, as reported by Murphy (1936:803), Baker (1947a:253) and others, is not known. Murphy (1936:796) notes that the northward distribution of the tropic birds in the Atlantic is dependent on the warm currents of water. In the western Atlantic, the poleward-flowing, warm currents of the Gulf Stream allow for the northern extension of the range of these birds to Bermuda. In the eastern Atlantic, cool currents flowing toward the equator restrict the northern range. The same condition prevails in the eastern Pacific where warm current flowing toward the pole enable the birds to range north to the Bonins and other islands. The three species of tropic birds known from Micronesia overlap very little in their ranges in this area. The White-tailed Tropic Bird has become firmly established in the western part of Micronesia, but there are only a few records from the extreme eastern part. The Red-tailed Tropic Bird appears to be resident only in the northern Marianas although it has been recorded in the Carolines and Marshalls. Interspecific competition may prevent considerable intermingling of breeding populations in Micronesia, or it may be that each species requires different ecologic conditions. =Sula dactylatra personata= Gould Masked Booby _Sula personata_ Gould, Proc. Zool. Soc. London, 1846, p. 21. (Type locality, North and northeast coasts of Australia = Raine Island.) _Sula cyanops_ Finsch, Ibis, 1880, p. 219 (Taluit); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 72 (Marshalls); Ogilvie-Grant, Cat. Birds British Mus., 26, 1898, p. 430 (Marshalls). _Parasula dactylatra personata_ Kuroda, in Momiyana, Birds Micronesia, 1922, p. 35 (Marshall Islands); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 232 (Marshall Islands). _Sula dactylatra personata_ Yamashina, Tori, 7, 1932, p. 407 (Medinilla); Hand-list Japanese Birds, rev., 1932, p. 187 (Medinilla, Marshall Islands); Hand-list Japanese Birds, 3d ed., 1942, p. 208 (Medinilla, Marshall Islands). _Geographic range._--Central and western Pacific from the Hawaiian Islands south to Australia, probably also in the Indian Ocean. In Micronesia: Mariana Islands--Medinilla; Marshall Islands--Jaluit? _Characters._--Adult: A large, white sea bird, with brown wings and tail; face dark blue; bill horn-colored with base orange-yellow in males and pink or light red in females; feet olive in males and lead gray in females. Immature: Resembles adult, but head, wings, tail, chin and throat dark brown; some white mottling may be present on back and rump; bill dark; feet lead colored. _Nesting._--Yamashina (1932a:407) reports the taking of 12 eggs on February 19, 1931, at Medinilla Island in the Marianas. _Remarks._--No specimen has been examined by me from the area reported upon. Little is known regarding the distribution of the Masked Booby in Micronesia. It is found on the island groups which surround Micronesia and future field observations probably will add to our knowledge of its occurrence in this area. It is known to be resident only in the northern Marianas. =Sula sula rubripes= Gould Red-footed Booby _Sula rubripes_ Gould, Syn. Birds Australia, pt. 4, 1838, app., p. 7. (Type locality, New South Wales = Raine Island.) _Pelecanus piscator_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 296, 299 (Lougounor = Lukunor); _idem_, Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, p. 351 (Lugunor). _Dysporus piscator_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelews); _idem_, Proc. Zool. Soc. London, 1872, p. 90 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 6, 47 (Palau). _Sula piscatrix_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 72 (Pelew, Luganor); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 64 (Rota, Palaos, Carolines); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne); Safford, Osprey, 1902, p. 70 (Rota); _idem_, The Plant World, 7, 1904, p. 267 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); _idem_, Guam, 1912, p. 19 (Guam); Cox, Island of Guam, 1917, p. 22 (Guam). _Sula piscator_ Ogilvie-Grant, Cat. Birds British Mus., 26, 1898, p. 432 (Pelew); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 24 (Guam). _Piscatrix sula rubripes_ Kuroda, in Momiyana, Birds Micronesia, 1922, p. 34 (Pelew, Luganor, Rota). _Sula sula rubripes_ Hand-list Japanese Birds, rev., 1932, p. 185 (Medinilla, Saipan, Rota, Palau, Lukunor, Likieb); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Yamashina, Tori, 10, 1940, p. 676 (Maug, Bikar); Hand-list Japanese Birds, 3d ed., 1942, p. 208 (Maug, Medinilla, Saipan, Rota, Palau, Lukunor, Bikar, Likieb). _Geographic range._--Indian Ocean east to central Pacific islands. In Micronesia: Mariana Islands--Maug, Medinilla, Saipan, Rota; Palau Islands--exact locality unknown; Caroline Islands--Lukunor; Marshall Islands--Bikar, Likieb, Bikini, Eniwetok. _Characters._--Adult: A large sea bird with plumage of variable color, mainly white or partly buff with black primaries and black-tipped secondaries, or grayish or brownish with white or grayish tail; throat blackish; face blue or green; bill bluish and lighter at tip; legs and feet red. Immature: Resembles adult, but often wholly brownish, lighter ventrally; bill blackish; feet yellowish red. Immature resembles that of _S. leucogaster_. _Nesting._--Morrison obtained a male nestling at Bikini on May 3, 1946. _Specimens examined._--Total number, 10 (3 males, 7 females) from Marshall Islands, USNM--Bikini (April 28, May 1, 2, 3). _Remarks._--The writer saw several birds approximately 20 miles east of Eniwetok on January 7, 1945. Morrison obtained a series of birds at Bikini in April and May, 1946. Murphy (1936:861-870) presents a wealth of information concerning the bird. He points out the need for a better understanding of the plumages of the adult birds and gives evidence that the birds of different colors may occur within the same population. He describes the Red-footed Booby as nesting in trees and shrubs. This type of nesting environment is present at many of the islands in Micronesia. =Sula leucogaster plotus= (Forster) Brown Booby _Pelecanus Plotus_ Forster, Descr. Anim., ed. Licht., 1844, p. 278. (Type locality Near New Caledonia.) _Dysporus sula_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, p. 90 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 6, 47 (Palau); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); Hartert, Novit. Zool., 7, 1900, p. 11 (Ruk). _Sula fusca_ Finsch, Ibis, 1880, p. 218 (Taluit). _Sula leucogastra_ Salvadori, Ornith. Papuasia, 3, 1882, p. 423 (Pelew, Carolinis); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 72 (Pelew, Ruk, Marshalls); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 63 (Palaos, Mariannes, Marshalls, Carolines); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne). _Sula sula_ Ogilvie-Grant, Cat. Birds British Museum, 26, 1898, p. 436 (Asuncion, Pelew); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 24 (Guam); Safford, Osprey, 1902, p. 66 (Mariannas); _idem_, The Plant World, 7, 1904, p. 267 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); _idem_, Guam, 1912, p. 19 (Guam); Prowazek, Die deutschen Marianen, 1913, p. 100 (Marianen); Takatsukasa and Kuroda, Tori, 1, 1915, p. 50 (Marianne); Cox, Island of Guam, 1917, p. 22 (Guam); Uchida, Annot. Zool. Japon., 9, 1918, pp. 487, 493 (Sea off Mariana Islands). _Sula leucogaster plotus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 34 (Pelew, Ruk, West Faiu, Uracas, Saipan, Marshalls); Yamashina, Tori, 7, 1932, p. 407 (Medinilla); Hand-list Japanese Birds, rev., 1932, p. 185 (Uracas, Pagan, Medinilla, Saipan, Truk, West Fayu, Grimes, Marshalls); Hand-list Japanese Birds, 3d ed., 1942, p. 208 (Uracas, Pagan, Medinilla, Saipan, Grimes, West Fayu, Truk, Marshalls); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 41 (Rota, Guam, Truk). _Geographic range._--Throughout tropical Pacific area and south to Australia. In Micronesia: Mariana Islands--Asuncion, Uracas, Pagan, Medinilla, Saipan, Rota, Guam; Palau Islands--exact locality unknown; Caroline Islands--Grimes, West Fayu, Truk, Kusaie; Marshall Islands--Jaluit, Eniwetok. _Characters._--Adult: A heavy sea bird dark brown except for white lower breast, belly, under tail, and auxillars; bill heavy and light bluish; face, gular pouch and feet greenish yellow. Immature: Resembles adult, but lower breast, belly and under tail mottled with brown; feet light yellow. _Measurements._--Two adult males (Rota, Guam) measure: wing 386, 408; tail 194; exposed culmen 93, 98; tarsus 45, 49; two adult females (Rota, Kusaie): wing 380, 487; tail 193, 217; exposed culmen 94, 99; tarsus 45, 50. _Weights._--The author (1948:41) records one immature female from Rota weighing 1042 grams. _Specimens examined._--Total number, 6 (3 males, 3 females), as follows: Mariana Islands, USNM--Rota, 3 (Oct. 24); AMNH--Guam, 1 (July 23); Palau Islands, AMNH--exact locality not given, 1 (Dec. 1); Caroline Islands, AMNH--Kusaie, 1 (April 19). _Nesting._--Few records have been published concerning nesting of the Brown Booby in Micronesia. Yamashina (1932a: 407) reports the taking of 12 eggs at Medinilla in the Mariana Islands on February 19, 1931. At Palau, Coultas (field notes) obtained reports that the bird nests at Kiangat, a small islet north of Babelthuap. _Parasites._--Uchida (1918:487, 493) obtained bird lice (Mallophaga), _Menopan brevipalpe_ and _Lipeurus potens_, from the Brown Booby from the "sea off Mariana Islands." _Remarks._--The Brown Booby has not been found abundantly by observers in the Micronesian area. Coultas and Kubary, who spent considerable time in this region, observed the bird at only a few of the islands. Probably the bird does not nest abundantly in Micronesia, although small colonies may be present. The NAMRU2 party observed a flock of twelve brown boobies on high cliffs at Taipingot Peninsula at Rota on October 24, 1945. Birds were seen also at Guam in May, July and November, 1945, and at Truk in December of the same year. Coultas obtained a single specimen at Kusaie; the natives told him that it was not a resident of the island. The writer observed several Brown Boobies approximately twenty miles east of Eniwetok in the Marshall Islands on January 7, 1945. These were in the company of other sea birds. =Phalacrocorax melanoleucus melanoleucus= (Vieillot) Little Pied Cormorant _Hydrocorax melanoleucos_ Vieillot, Nouv. Dict. Hist. Nat., 8, 1817, p. 88. (Type locality, "Australasie," restricted to New South Wales.) _Carbo melanoleucus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 90, 114 (Pelew). _Graculus melanoleucus_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 48 (Pelew). _Microcarbo melanoleucus_ Salvadori, Ornith. Papuasia, 3, 1882, p. 410 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 72 (Pelew). _Phalacrocorax melanoleucus_ Ogilvie-Grant, Cat. Birds British Mus., 26, 1898, p. 398 (Pelew); Nehrkorn, Kat. Eiers., 1899, p. 235 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 50 (Pelew); Uchida, Annot. Zool. Japon., 9, 1918, p. 486 (Palau). _Ph[alacrocorax] melanoleucos_ Reichenow, Die Vögel, 1, 1913, p. 127 (Palauinseln). _Microcarbo melanoleucus melanoleucus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 35 (Pelew). _Microcarbo melanoleucus melvillensis_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 228 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 186 (Babelthuap, Koror). _Haliëtor melanoleucos melanoleucos_ Peters, Check-list Birds World, 1, 1931, p. 93 (Pelew). _Phalacrocorax melanoleucus melanoleucus_ Mayr, Amer. Mus. Novit., no. 486, 1931, p. 5 (Pelew); Amadon, Amer. Mus. Novit., no. 1175, 1942, p. 2 (Palau); Mayr, Birds Southwest Pacific, 1945, pp. 50, 284 (Palau, Marianas); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 41 (Palau). _Phalacrocorax melanoleucos melvillensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 207 (Pagan, Babelthuap, Koror, Angaur). _Geographic range._--Tasmania, Australia, Lesser Sunda north through Melanesia to Palau Islands. In Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Ngabad, Peleliu, Anguar. _Characters._--Adult: A small cormorant with upper parts black with dull greenish gloss; under parts white except vent and under tail-coverts which are sooty-black. _Measurements._--The author (1948: 41) gives the following measurements of two adult females from Peleliu: wing, 220 and 222; tail, 153 and 157; culmen from notch of suture between maxilla and quadratojugal bones, 35 and 36. _Specimens examined._--Total number, 15 (1 male, 12 females, 2 unsexed), as follows: Palau Islands, USNM--Peleliu, 6 (Aug. 27, Sept. 7, 10, 16); AMNH--exact locality not given, 9 (Nov. part). _Nesting._--Nehkorn (1899:235) recorded eggs taken at Palau. Some of the specimens obtained by Coultas in November, 1931, had swollen gonads. The author found no evidence of nesting in August and September, 1945, in the southern Palaus. _Food habits._--The author (1948: 41) found small fish in the stomachs of birds taken in August and September. The contents of each stomach averaged approximately 3 cc. in volume. _Parasites._--Uchida (1918:486) found the bird louse (Mallophaga), _Lipeurus subsetosus_, on the Little Pied Cormorant from Palau. _Remarks._--The Palaus mark the northernmost point of range of the Little Pied Cormorant. It does not occur in the Philippines and must have reached Palau from the New Guinea region. It is unknown at Yap and other "high" islands in the Carolines. A sight record of this species at Pagan in the northern Marianas, made by Orii and reported in the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:207), may be questioned. Amadon (1942:1) has studied the races of this species and points out that there is little geographic variation in the species; it is divisible into three subspecies. One of these is confined to New Zealand. Another occurs only on Rennell Island, Solomons. The six specimens taken by the NAMRU2 party at Peleliu included only two adults, whose measurements are within the range of those studied by Amadon. The NAMRU2 party found the birds numerously in the southern Palaus in 1945. Birds were concentrated in the areas of mangrove swamp and on the tidal flats. In August and September, they were observed frequently in groups of 10 to 15, either sitting on the ground or perched on low mangroves or dead snags sunning themselves. Coultas (field notes) received reports that they nested at a freshwater lake on the "main island" (Babelthuap?) Ripley (1948) reports the occurrence of "about a dozen anhingas (presumably _Anhinga melanogaster_)" at Babelthuap on 12 November 1946. =Fregata minor minor= (Gmelin) Pacific Man-o'-War _Pelecanus minor_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 572. (No type locality = Christmas Island, Indian Ocean.) _Pelecanus aquila?_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, p. 154 (Carolines). _Pelecanus aquilus?_ Lesson, Man. d'Ornith., 2, 1828, p. 354 (Carolines). _Atagen aquilus_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 61 (Ladrone or Marian Islands). _Tachypetes aquila_ Finsch, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); Hartert, Novit. Zool., 7, 1900, p. 11 (Ruk); Prowazek, Die deutschen Marianen, 1913, p. 100 (Marianen). _Tachypetes aquilus_ Finsch, Ibis, 1880, p. 333 (Taluit); _idem_, Journ. f. Ornith., 1880, pp. 296, 310 (Ponapé, Kuschai); _idem_, Ibis, 1881, pp. 109, 115 (Kuschai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 299, 353 (Mortlock, Ruk). _Fregata aquila_ Salvadori, Ornith. Papuasia, 3, 1882, p. 403 (Carolines, Marshalls); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, (1890-1891), p. 71 (Ruk, Luganor, Ponapé, Ualan, Marshalls); Ogilvie-Grant, Cat. Birds British Mus., 26, 1898, p. 443 (Carolines, Marshalls); Finsch, Deut. Ver. zum Schultze der Vogelwelt, 25, 1900, p. 452 (Ponapé, Kuschai, Marshalls); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 24 (Guam); Safford, The Plant World, 7, 1904, p. 267 (Guam); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 22 (Guam). _Fregata aquila palmerstoni_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 35 (Carolines, Marshalls). _Fregata minor peninsulae_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 233 (Carolines, Marshalls); Peters, Check-list Birds World, 1, 1931, p. 96 (Carolines?, Marshalls?). _Fregata minor palmerstoni_ Hand-list Japanese Birds, rev., 1932, p. 186 (Yap, Faraulep, Truk, Lukunor, Ponapé, Kusaie, Namu, Likieb); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Yamashina, Tori, 10, 1940, p. 676 (Maug, Bikar). _Fregata minor minor_ Hand-list Japanese Birds, 3d ed., 1942, p. 207 (Maug, Yap, Faraulep, Truk, Lukunor, Ponapé, Kusaie, Namu, Bikar, Likieb). _Fregata minor_ Borror, Auk, 64, 1947, p. 416 (Agrihan). _Geographic range._--Eastern Indian Ocean to western Pacific Ocean. Limits of range not certainly known. In Micronesia: Mariana Islands--Agrigan, Maug, Saipan, Guam; Caroline Islands--Yap, Faraulep, Truk, Lukunor, Ponapé, Kusaie; Marshall Islands--Namu, Bikar, Likieb, Kwajalein, Bikini. _Characters._--Adult male: Large sea bird with deeply forked tail; blackish but wing-coverts paler; head and back glossy purple and blue; breast lighter than belly. Adult female: Resembles adult male, but head blacker; chin and throat grayer; breast more whitish. Immature: Resembles adult, but head and throat whitish washed with buff; breast dark brown; belly whitish. _Measurements._--Two adult males measure: wing, 572; tail, 354, 396; exposed culmen, 98, 103; two adult females; wing, 583, 604; tail, 365; exposed culmen, 119, 127. These four specimens are from Bikini. _Specimens examined._--Total number, 10 (3 males, 7 females), from Marshall Islands, USNM--Bikini (March 11, 22, 29, 30, April 13, 29, May 3, 14). _Remarks._--The systematic position of the subspecies of _Fregata minor_ in the Pacific area is not well established. I am following the committee who prepared the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:207) in using the name _F. m. minor_, although a thorough study may show that these birds have closer relationships to one of the other subspecies of the Pacific area. _Fregata minor_ has been reported only occasionally in the Marianas and probably is not resident there. Borror (1947:416) reports the bird at Agrihan on August 11, 1945, and Seale (1901:24) mentions one taken at Guam in November, 1889. No records are known from the Palaus. In the Carolines the birds are probably resident, especially in the eastern part. In the Marshalls the species is a conspicuous member of the bird colonies on the coral atolls. Wallace (field notes) observed two birds at Loi Island in Kwajalein Atoll on May 7, 1944. Morrison obtained ten specimens at Bikini in the period from March through May in 1946. =Fregata ariel ariel= (Gray) Least Man-o'-War _Atagen (sic) Ariel_ Gray, Gen. Birds, 3, 1845, col. pl. [185]. (Type locality, Raine Island, Queensland.) _Pelecanus minor_ Lesson, Traite d'Ornith., 1831, p. 607 (Mariannes, Carolines). _Tachypetes minor_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Mackenzie Group); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 90 (Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap). _Fregata minor_ Salvadori, Ornith. Papuasia, 3, 1882, p. 405 (Mariannes, Mackenzie); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 71 (Uap, Ngoli or Matelotas). _Tachypetes aquila_ var. _minor_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 65 (Rota, Carolines, Marshalls); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne). _Fregata ariel_ Ogilvie-Grant, Cat. Birds British Mus., 26, 1898, p. 447 (Marianas, Carolines); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 25 (Guam?); Safford, Osprey, 1902, p. 70 (Marianas); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam). _Fregata ariel ariel_ Mathews, Birds Australia, 4, 1914-15, p. 285 (Carolines, Marshalls); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 36 (Yap, Ngoli, Rota); Hand-list Japanese Birds, rev., 1932, p. 186 (Rota, Yap, Ngulu, Uluthi); Hand-list Japanese Birds, 3d ed., 1942, p. 208 (Rota, Yap, Ngulu, Uluthi). _Geographic range._--China coast and Philippines south to Australia and east to Pacific islands. In Micronesia: Mariana Islands--Guam?, Rota; Caroline Islands--Yap, Ngulu, Ulithi. _Characters._--Adult male: Resembles _F. m. minor_, but smaller and blacker with upper parts lustrous greenish-blue and white patch on lower flank. Adult female: Resembles adult male, but browner with paler nape and white breast. Immature: Resembles adult, but with head, chin, throat, and belly white washed with rufous. _Remarks._--Like _F. minor_, the Least Man-o'-War has not been observed often in Micronesia. Marche obtained one female at Rota in June, 1888. D. H. Johnson saw a bird thought to be of this species at Agfayan Bay, Guam, on 4 June 1945. Records from the western Carolines are few. There are no reports of this bird from the Palaus and the Marshalls. It may breed on some of the atolls in the Carolines. The two species of man-o'-war birds may be difficult to distinguish in the field. The smaller size of _Fregata ariel_ is perhaps the most useful character although it may be easily recognized also by the presence of the white flank patch, if it can be observed. Both of the species of _Fregata_ discussed in this report have representatives in the Atlantic, Indian and Pacific oceans. Murphy (1936:920) has shown that the man-o'-war birds are able to cross the Isthmus of Panamá between the Pacific and Atlantic oceans. This route may also be the means of dispersal for other species. The irregular distribution of these birds as well as of other sea birds in the oceanic islands of the Pacific may be caused by their remaining over waters which contain preferred foods and their avoidance of waters which lack preferred foods. =Butorides striatus amurensis= Schrenck Amur Green Heron _Ardea (Butorides) virescens_ var. _amurensis_ Schrenck, Reise Amur Lande, 1, pt. 2, 1860, p. 441. (Type locality, Amurland.) _Butorides striatus javanicus_ Hand-list Japanese Birds, rev., 1932, p. 183 (Koror, Babelthuap). _Butorides striatus amurensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 204 (Babelthuap, Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in northeastern Asia, China, Japan, Bonins. Winters south to Philippines and Malaysia. In Micronesia: Palau Islands--Babelthuap, Koror. _Specimens examined._--Total number, 2 females, from Palau Islands, AMNH--exact locality not given (Nov. 13, Dec. 17-18). _Remarks._--The Amur Green Heron has been recorded as a winter visitor to the Palau Islands. Two females taken by Coultas in November and December, 1931, are immature. He comments (field notes) that he saw, in all, three birds in taro patch and mangrove swamp habitat. =Bubulcus ibis coromandus= (Boddaert) Cattle Egret _Cancroma Coromanda_ Boddaert, Table Pl. enlum., 1783, p. 54. (Type locality, Coromandel.) _Ardeola ibis coromanda_ Hand-list Japanese Birds, rev., 1932, p. 183 (Koror). _Bubulcus ibis coromandus_ Hand-list Japanese Birds, 3d ed., 1942, p. 204 (Koror, Babelthuap); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--India, Ceylon, east to China and Japan and south to Malaysia. In Micronesia: Palau Islands--Babelthuap, Koror. _Remarks._--The Japanese ornithologists have recorded the Cattle Egret from Babelthuap and Koror in the Palau Islands. It is a winter migrant. =Egretta intermedia intermedia= (Wagler) Plumed Egret _Ardea intermedia_ Wagler, Isis, 1829, p. 659. (Type locality, Java.) _Egretta intermedia intermedia_ Hand-list Japanese Birds, rev., 1932, p. 183 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 203 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 42 (Rota, Guam, Peleliu, Angaur, Ulithi). _Egretta intermedia_ Wharton and Hardcastle, Journ. Parasitology, 32, 1946, pp. 306, 310 (Ulithi); Baker, Ecol. Monogr., 16, 1946, p. 408 (Guam). _Geographic range._--India and Ceylon east to Malaysia, Philippines, China and Japan. In Micronesia: Mariana Islands--Saipan, Rota, Guam; Palau Islands--Koror, Peleliu, Angaur; Caroline Islands--Ulithi. _Characters._--Adult: A large white heron with green facial skin; black legs, feet and toes. In breeding plumage: Head with crest; neck and back with ornamental plumes; bill black. Winter plumage: Without crest or plumes; bill yellow with blackish tip. Immature: Resembles adult in winter plumage, but feathers soft and downy. _Measurements._--Five males from Saipan, Rota, Guam, and Angaur measure: wing, 295-321 (308); tail, 112-127 (119); culmen, 85-87 (87); tarsus, 111-118 (114); three females from Saipan, Ulithi, Angaur: wing, 294-301 (297); tail, 101-116 (110); culmen, 77-83 (80); tarsus, 108-115 (107). _Weights._--The author (1948:43) records the weights of two males from Guam as 445 and 463. _Specimens examined._--Total number, 8 (5 males, 3 females), as follows: Mariana Islands, USNM--Saipan, 2 (Sept. 29, Oct. 2)--Rota, 1 (Oct. 31)--Guam, 2 (June 13); Palau Islands, USNM--Angaur, 2 (Sept. 21); Caroline Islands, USNM--Ulithi, 1 (Aug. 15). _Food habits._--The NAMRU2 party found grasshoppers, other insects, spiders and lizards in the stomachs of egrets taken at Guam, Ulithi, and Angaur. _Parasites._--Wharton and Hardcastle (1946:306, 310) obtained the chiggers (Acarina), _Neoschöngastia egretta_ and _N. ewingi_, from this egret from Ulithi. _Remarks._--The NAMRU2 party obtained Plumed Egrets at Rota, Guam, Ulithi, and Angaur in 1945. Previously, the only known record was from Koror, as reported in the Hand-list of Japanese Birds (Hachisuka _et al._, 1932:183). In addition, in 1945, Joe T. Marshall, Jr., obtained two birds at Saipan, and Gleise (1945:220) reported seeing "white herons" at Tinian, which probably were egrets. Gleise estimated the number of these birds at Tinian to be fifty; he found them in swampy areas. At Rota, the NAMRU2 party found a flock of sixteen birds in a cultivated field on October 31. At Guam, egrets were first observed on February 25, 1945, when a flock of fourteen was found in a fallow rice paddy near Piti. This flock remained in this area and were seen occasionally until as late as June 13, when two were taken as specimens. A short time later (June 30) the entire area was cleared for military use and the birds were seen no more. At Agfayan Bay a flock of sixteen birds was found on the beach on July 24 and on August 6. These birds kept apart from Reef Herons which were also in the area. In June, 1946, M. Dale Arvey observed egrets in swamps along the Ylig River at Guam. At Ulithi Atoll, three egrets were seen on August 15 at Potangeras Island, feeding in grassy areas adjacent to the beach. In the southern Palaus, the NAMRU2 party found egrets in August and September on tidal flats and open grasslands at Peleliu and Angaur. At Peleliu, a flock of twenty-five birds was seen on September 8 and a flock of eight birds on September 16. At Angaur approximately twenty birds were seen in groups of five or more on September 21. These birds, unlike the Reef Herons, preferred grasslands to beach areas for feeding and were usually seen in sizeable flocks. There was no evidence of breeding; specimens examined were either immatures or adults in winter plumage, since they had yellow bills tipped with black and slight or no development of ornamental plumes. Birds taken at Guam in June and at Angaur in September had no ornamental plumes, while birds taken at Ulithi in August, at Saipan in September and October, and at Rota in late October show some development of the back plumes. Wharton and Hardcastle (1946:306) found the same species of chigger on Plumed Egrets from Ulithi and from Okinawa in the Riu Kiu Islands. The NAMRU2 party observed the birds in Micronesia from February until October in 1945, and although the Plumed Egret may be considered as merely a visitor to Micronesia, it would not be surprising to find nests there. The fact that several new distributional records were obtained for Micronesia in 1945 may indicate that the birds have been overlooked by ornithologists in the past or that the birds are increasing the breadth of their winter (or breeding?) range. =Demigretta sacra sacra= (Gmelin) Reef Heron _Ardea sacra_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 640. (Type locality, Tahiti.) _Ardea jugularis_ Kittlitz, Observ. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 286, 299, 304 (Ualan, Lougounor, Guahan); Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen); Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 63 (Ualan); Pelzeln, Reise "Novara," Vögel, 1865, pp. 118, 162, 120, 121 (Puynipet, Ualan). _Ardea (Herodias) atra_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 48 (Ladrone or Marian Islands, Caroline Islands). _Ardea sacra_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Matelotas Islands); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 118 (Pelews); Finsch and Hartlaub, Journ. f. Ornith., 1870, p. 137 (Pelews, Matelotas); Gray, Hand-list Birds, 3, 1871, p. 28 (Marian, Carolines, Pelews, Matelotas); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 104 (Pelew, Uap, Ualan); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 32 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 38 (Ponapé, Ualan); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 294, 306 (Ponapé, Kuschai); _idem_, Ibis, 1880, pp. 220, 330, 332 (Taluit); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, pp. 105, 106, 109, 115 (Kushai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 299, 353 (Mortlocks, Ruk); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 51 (Jaluit, Kuschai); Oustalet, Le Nat., 1889, p. 261 (Mariannes); Wiglesworth, Ibis, 1893, p. 211 (Marshalls); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 36 (Guam, Marshalls, Palaos, Carolines); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln). _Demiegretta sacra_ Salvadori, Ornith. Papuasia, 3, 1882, p. 348 (Marshalls, Ualan, Ponapé, Ruck, Pelew, Mariannis); Wiglesworth, Abhandl. Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 67 (Marianne, Pelews, Luganor, Ruk, Ponapé, Ualan, Taluit); Hartert, Novit. Zool., 5, 1898, p. 64 (Saipan); Sharpe, Cat. Birds British Mus., 26, 1898, p. 137 (Pelew, Carolines, Marshalls); Hartert, Novit. Zool., 7, 1900, p. 11 (Ruk); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 29 (Guam); Safford, Osprey, 1902, p. 67 (Marianas); _idem_, The Plant World, 7, 1904, p. 266 (Guam); Kuroda, Avifauna Riu Kiu, 1925, p. 129 (Micronesia); Bryan, Guam, Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Bequaert, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 266 (Kusaie). _Demigretta sacra_ Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Prowazek, Die deutschen Marianen, 1913, p. 101 (Saipan, Tinian); Cox, Island of Guam, 1917, p. 21 (Guam); Bequaert, Mushi, 12, 1939, p. 81 (Kusaie); Warton, Ecol. Monogr., 16, 1946, p. 175 (Guam); Warton and Hardcastle, Journ. Parasitology, 32, 1946, pp. 306, 316 (Ulithi, Guam). _Demiegretta jugularis_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 50 (Truk, Ponapé, Pelew). _Demiegretta jugularis grayi_ Uchida, Annot. Zool. Japon., 9, 1918, pp. 484, 488, 490 (Ponapé). _Demiegretta sacra sacra_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 36 (Guam, Saipan, Angaur, Luganor, Yap, Ngoli, Ruk, Ponapé, Kusaie, Taluit). _Demigretta sacra sacra_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 171 (Kusaie); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 198 (Carolines); Yamashina, Tori, 7, 1932, p. 406 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 183 (Saipan, Guam, Babelthuap, Peliliu, Angaur, Ngulu, Yap, Truk, Lukunor, Ponapé, Kusaie, Jaluit, Majuro); Mayr and Amadon, Amer. Mus. Novit., no. 1144, 1941, p. 10 (Guam, Saipan, Palau, Ponapé, Kusaie, Ruk, Tah); Hand-list Japanese Birds, 3d ed., 1942, p. 203 (Saipan, Rota, Babelthuap, Peliliu, Angaur, Ngulu, Yap, Ulithi, Truk, Lukunor, Ponapé, Kusaie, Jaluit, Arhno, Majuro, Moloclab, Wotze, Likieb, Ailuk); Mayr, Birds Southwest Pacific, 1945, pp. 51, 284 (Micronesia); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 90 (Tinian); Strophlet, Auk, 63, 1946, p. 535 (Guam); Borror, Auk, 64, 1947, p. 417 (Agrihan); Stott, Auk, 64, 1947, p. 524 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 42 (Rota, Guam, Peleliu, Ulithi, Truk). _Demigretta sacra micronesiae_ Momiyama, Tori, 5, no. 22, 1926, p. 110 (Type locality, Caroline Islands; Pelew, Yap, Truk, Ponapé, Kusaie). _Geographic range._--Coasts of Asia and adjacent islands from Korea and Japan south to Malaysia, Australia, Melanesia, Polynesia and Micronesia. In Micronesia: Mariana Islands--Agrigan, Tinian, Saipan, Rota, Guam; Palau Islands--Babelthuap, Koror, Garakayo, Ngesebus, Peleliu, Ngabad, Anguar; Caroline Islands--Ulithi, Yap, Ngulu, Truk, Lukunor, Ponapé, Kusaie; Marshall Islands--Jaluit, Arhno, Majuro, Maloclab, Wotze, Likieb, Ailuk, Bikini, Eniwetok, Kwajalein. _Characters._--A medium-sized heron with three color phases: in gray phase color of body varies from "deep blackish-slate" to light bluish-slate, particularly on the breast, with a white gular stripe; wear and fading causes the color of the body to change to brownish-slate; bluish-gray ornamental plumes may be present on adult; in white phase color of body is pure white in adult stage; plumage of immature may be mottled; in mottled phase there may be a variable amount of gray and white (for complete study of plumages of _Demigretta sacra_ see Mayr and Amadon, 1941:4). _Measurements._--Mayr and Amadon (1941:1) record the length of the wing of thirty adults from the Marianas and Carolines as 268-309 (284). Seven adult males obtained by the NAMRU2 party at Rota, Guam and Peleliu measure: wing, 287-307 (294); tail, 95-114 (101); culmen, 91-101 (96); tarsus, 78-87 (82); seven adult females, from Rota and Guam: wing, 265-285 (275); tail, 87-96 (91); culmen, 86-92 (89); tarsus, 72-79 (76). _Weights._--The author (1948:42) lists the following weights: four adult males from Guam (gray phase) 590-667 (614); two adult males from Guam (white phase) 600 and 662; five adult females from Guam and Rota (gray phase) 477-553 (506). _Specimens examined._--Total number, 80 (38 males, 40 females, 2 unsexed) as follows: Mariana Islands, USNM--Rota, 3 (Oct. 18, Nov. 2, 5)--Guam, 21 (May 11, June 6, 18, July 6, 8, 16, 24, 27, Aug. 6, 8, 27); AMNH--Saipan, 2 (July 22)--Guam, 9 (Feb. 11, Mar. 6, 7, April 11, Aug. 15, Sept. 14, 16, Nov. 27, Dec. 20); Palau Islands, USNM--Peleliu, 3 (Sept. 10, 16); AMNH--exact locality not given, 5 (Nov. 8, 21, 23); Caroline Islands, USNM--Ulithi, 1 (Aug. 15)--Kusaie, 1 (Feb. 8); AMNH--Truk, 3 (Feb. 18, May 20, Nov. 5)--Tah, 2 (Oct. 18)--Ponapé, 2 (Nov. 21, undated)--Kusaie, 26 (Jan. 25, 26, Feb., Mar. 10-20, 20-30, April 1-10, 18); Marshall Islands, USNM--Bikini, 2 (March 29, April 2). _Nesting._--The Reef Heron apparently nests on most of the islands in Micronesia. The eggs are laid in a nest of grass and twigs on or near the ground. Hartert (1898:64) records a nest found in grass at Saipan on July 28, 1895. Yamashina (1932a:406) reports on one egg taken at Ponapé on July 23, 1931. Marshall (1949:219, fig. 37) found a breeding bird in April at Tinian. Coultas (field notes) learned from the natives at Ponapé that the Reef Heron builds a nest of small sticks near the ground in the mangrove thickets. Two or three eggs are laid, and nests can be found at various times of the year. Mayr and Amadon (1941:4) comment on the prolonged breeding season and report six sets of eggs from Polynesia taken in January, March, April, September, October, and November. _Food habits._--The author (1948:42) found fish and crabs in the stomachs of birds taken at Guam, Ulithi and Peleliu. _Parasites._--Uchida (1918:484, 488, 490) found the following bird lice (Mallophaga) on the Reef Heron at Ponapé: _Nirmus orarius_, _Colpocephalum importunum_, and _Myrsidea teraokai_. Bequaert (1939:81 and 1941:266) found the fly (Hippoboscidae), _Ornithoctona plicata_, on the heron at Kusaie. Wharton (1946:175) and Wharton and Hardcastle (1946:306, 316) obtained chiggers (Acarina), _Neoschöngastia egretta_ and _N. carveri_, from the Reef Heron at Guam and Ulithi. _Remarks._--The species _Demigretta sacra_ contains two subspecies, the widespread _D. s. sacra_ and a larger form, _D. s. albolineata_ (Gray), known from New Caledonia and the Loyalty Islands. The latter subspecies is surrounded by the former, a distribution which closely parallels that in each of the species _Phalacrocorax melanoleucus_ and _Gygis alba_ of Oceania. Recently Delacour (in Delacour and Mayr, 1945b:105) has dropped the name _Demigretta_ placing all of the forms of this genus in _Egretta_. He says, "We cannot accept the genus _Demigretta_, which is based on the more extended feathering of the tibia, the different length and texture of the feathers of the trains, the shortness of the tarsus and the presence of a dark gray color phase. The latter exists in the Madagascan and African subspecies of _Egretta garzetta_." The Reef Heron is a conspicuous member of the bird life of Micronesia, being recorded from most of the island groups. It prefers the placid and shallow waters of the lagoons and tidal beaches where it obtains the littoral animal life as food. The birds are seldom seen inland and usually frequent the beaches and rocky coasts. In this respect there is little opportunity for competition with the migratory Plumed Egret, which prefers the grassy upland and marsh areas and inland ponds. The Reef Heron is a quiet, usually solitary, and retiring bird, being exceedingly difficult to approach, especially when found on the open tidal flats. The problem of plumages and color phases in the Reef Heron has been treated by Mayr and Amadon (1941:4-10). Specimens which they examined from Micronesia were found to be 54 percent gray, 40 percent white, and 6 percent mottled. Of the birds obtained by NAMRU2 field parties, fewer than 40 percent were white. Field counts showed a considerable variation in the ratio of grays to whites: Guam--6 grays to 4 whites; Ulithi--4 grays, 6 whites, 1 mottled; Palau--equal number of grays and whites; Truk--2 whites, 1 gray, 1 mottled. For some unknown reason, the gray birds were more easily approached than the white birds. Gleise and Genelly (1945:221) saw one white Reef Heron at Eniwetok. Wallace (field notes) found white herons more numerous than gray ones at Kwajalein in 1944 and 1945. Borror (1947:417) observed gray birds at Agrigan. Stott (1947:524) saw one blue heron on December 24, at Saipan. The 150 birds seen by him at Lake Susupe in December probably were Plumed Egrets. In discussing the variation in the color phases of the Reef Heron throughout its range, Mayr (1924b:237) suggests that the reduced variability of small populations may not be due to accidental gene loss, but instead to the population having descended from a single pair or from one fertilized female. The descendents would naturally possess only those characters provided for in the genetic make-up of the parents. Reef Herons on New Zealand and in the Marquesas Islands all are gray, while at other island groups different proportions of gray and white individuals occur; such phenomena may result because of the genetic constitution of the "founders." =Nycticorax nycticorax nycticorax= (Linnaeus) Black-crowned Night Heron _Ardes Nycticorax_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 142. (Type locality, Southern Europe.) _Nycticorax griseus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 105 (Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 69 (Uap). _Nycticorax nycticorax_ Sharpe, Cat. Birds British Mus., 26, 1898, p. 146 (Yap). _Nycticorax nycticorax nycticorax_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 36 (Mackenzie, Yap); Hand-list Japanese Birds, rev., 1932, p. 183 (Yap, Uluthi); Hand-list Japanese Birds, 3d ed., 1942, p. 204 (Yap, Uluthi); Mayr, Birds Southwest Pacific, 1945, p. 302 (Marianas, Yap). _Geographic range._--Europe and Africa east to Japan and Malaysia. In Micronesia: Mariana Islands--Tinian; Palau Islands--Koror; Caroline Islands--Yap, Ulithi, Truk. _Specimens examined._--Total number, 2 immature females, as follows: Palau Islands, USNM--Koror, 1 (Nov. 27); Caroline Islands, AMNH--Truk, 1 (June 18). _Remarks._--The Black-crowned Night Heron is a winter visitor to western Micronesia. Marshall (1949:221) records six of these birds on Tinian on April 4, 1945, and one on Koror on November 27. =Nycticorax caledonicus pelewensis= Mathews Rufous Night Heron _Nycticorax caledonicus pelewensis_ Mathews, Bull. British Ornith. Club, 46, 1926, p. 60. (Type locality, Pelew Islands.) _Nycticorax caledonicus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 117, 118 (Pelew); Sharpe, Cat. Birds British Mus., 26, 1898, p. 158 (Pelew); Hartert, Novit. Zool., 7, 1900, p. 10 (Ruk); Reichenow, Die Vögel, 1, 1913, p. 255 (Palauinseln); Takatsukasa and Kuroda, Tori, 1, 1915, p. 50 (Pelew); Uchida, Annot. Zool. Japon., 9, 1918, p. 486 (Palau); Wetmore, in Towsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 172 (Uala, Truk Atoll); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 37 (Pelew, Ruk). _Nycticorax manillensis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 105 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 33 (Palau); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 69 (Pelew, Ruk). _Nycticorax caledonicus pelewensis_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 200 (Pelew, Carolines); Peters, Proc. Boston Soc. Nat. Hist., 39, 1930, p. 271 (Pelew, Carolines); Peters, Check-list Birds World, 1, 1931, p. 115 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 183 (Palau, Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 204 (Babelthuap, Koror, Coracel, Truk); Amadon, Amer. Mus. Novit., no. 1175, 1942, p. 6 (Palau, Ruk); Mayr, Birds Southwest Pacific, 1945, p. 285 (Palau, Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 43 (Angaur, Peleliu, Garakayo, Truk). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Coracel, Garakayo, Peleliu, Ngabad, Angaur; Caroline Islands--Truk. _Characters._--Adult: Size medium; head and nape dark slaty-black; occipital plumes white with dark tips and shafts; back dark reddish-brown, lighter on sides of neck, wings, wing coverts, rump, and tail; under parts whitish with light reddish-brown on sides of neck extending to throat and upper breast; tibia with some brownish feathers; underwing pinkish; feet yellowish-brown; bill black. Immature: Resembles adult, but upper parts mottled black with reddish-brown; underparts with lighter streaks of brown and whitish on breast; feet yellowish; bill black above, yellowish below. Adult resembles _N. c. manillensis_ Vigors, but is duller above. _Measurements._--Two adult males from Peleliu measure: wing, 293, 299; tail, 105, 107; culmen, 82, 89; tarsus, 79, 81; seven adult females from Peleliu: wing, 269-286 (280); tail, 101-106 (104); culmen, 76-84 (80); tarsus, 78-83 (80); one adult female from Truk: wing, 280; tail, 97; culmen, 83; tarsus, 79. _Specimens examined._--Total number, 27 (5 males, 18 females, 4 unsexed), as follows: Palau Islands, USNM--Peleliu, 9 (Aug. 31, Sept. 1, 5, 6, 8, Dec. 6); AMNH--exact locality not given, 16 (Nov. 7, 8, 13, 23, 25, Dec. 1, undated); Caroline Islands, USNM--Truk, 1 (Feb. 16); AMNH--Truk, 1 (May 25). _Nesting._--The NAMRU2 party observed a nesting colony of these night herons at Peleliu on August 29, 1945. Approximately eight nests were observed in a grove of saplinglike trees at the edge of a mangrove swamp. These nests were 15 to 20 feet above the ground; most of them contained one or two nestling birds. Two subadults and three nestlings in postnatal molt were obtained; no eggs were found. Marshall (1948:219) records breeding in August, September and December. _Food habits._--Baker (1948:43) reports that stomachs of night herons obtained by the NAMRU2 party at Peleliu contained a great variety of animal foods, including eels, fish, lizards (skinks), crabs, shrimp, and insects. The stomach of one adult contained 14 large grasshoppers and four fish, totaling about 15 cc. in volume. The nestlings had eels, skinks, and insects in their stomachs. _Parasites._--Uchida (1918:486) found the bird louse (Mallophaga), _Lipeurus baculus_, on the night heron at Palau. _Remarks._--Amadon (1942:4-8) has made the most recent study of the species _Nycticorax caledonicus_ and recognizes eight subspecies from Australia and New Calendonia north to the Caroline and Bonin islands. This is one of the few tropical and subtropical species which has extended its range to the Bonin islands. The discontinuous distributions of this species prevents an accurate estimation of the route by which it reached the Bonins. The presence of the bird at Palau and at Truk makes it difficult to account for its absence at Yap and other intervening, and seemingly suitable, islands. Populations at Palau and Truk appear to be similar and are placed in the same subspecies, but when adequate material is available from Truk, further study may reveal that the populations on the two islands (Truk and Palau) are recognizably different. At the southern Palau Islands, night herons were found by the NAMRU2 party in mangrove swamps, lagoons and on beaches. I found them to be inactive during the daytime; the birds were usually perched singly in trees or at the edge of the water. The birds appeared to have special roosting places and were observed sitting in the same place on several different occasions. McElroy of the NAMRU2 party reported seeing three night herons at Truk in December, 1945. =Gorsachius goisagi= (Temminck) Japanese Bittern _Nycticorax goisagi_ Temminck, Pl. Col., livr. 98, 1835, pl. 582. (Type locality, Japan.) _Gorsakius goisagi_ Hand-list Japanese Birds, rev., 1932, p. 184 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 204 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Eastern China, Japan, Riu Kius, Formosa, and Philippine Islands. In Micronesia: Palau Islands--Koror. _Remarks._--_Gorsachius goisagi_ has been recorded from Koror in the Palau Islands. It may be classed as a rare migrant to western Micronesia. =Gorsachius melanolophus melanolophus= (Raffles) Malay Bittern _Ardea melanolopha_ Raffles, Trans. Linn. Soc. London, 13, 1822, p. 326. (Type locality, Western Sumatra.) _Nycticorax goisagi_ Hartlaub and Finsch, Proc. Zool. London, 1868, pp. 8, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, p. 89 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 68 (Pelew). _Nycticorax melanolophus_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 35 (Palau). _Gorsachius melanolophus_ Sharpe, Cat. Birds Brit. Mus., 26, 1898, p. 166 (Pelew). _Gorsahius melanolophus melanolophus_ Hand-list Japanese Birds, rev., 1932, p. 184 (Pelew); Hand-list Japanese Birds, 3d ed., 1942, p. 204 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Gorsachius melanolophus melanolophus_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 200 (Pelew). _Geographic range._--India, Ceylon, southern China, Formosa, Indochina, Malaysia. In Micronesia: Palau Islands--exact locality unknown. _Remarks._--Captain Tetens obtained a specimen of this bittern at the Palau Islands which was reported on by Hartlaub and Finsch (1868a:8, 1868b:118). It is probably a rare straggler to western Micronesia. The specimen has not been seen by me; it may be of the subspecies _G. m. kutteri_ (Cabanis), which is known from the Philippine Islands. =Ixobrychus sinensis= (Gmelin) Chinese Least Bittern _Ardea Sinensis_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 642. (Type locality, China.) _Ardea lepida_ Lesson, Traité d'Ornith., 1831, p. 573 (Marianne); Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen). _Ardea sinensis_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 305 (Guahan); Gray, Hand-list Birds, 3, 1871, p. 31 (Marian); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 105 (Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 33 (Palau, Yap); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk). _Ardea (Ardetta) sinensis_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 49 (Ladrone or Marian Islands). _Ardetta Sinensis_ Salvadori, Ornith. Papuasia, 3, 1882, p. 364 (Pelew, Carolines, Mariannis); Oustalet, Le Nat., 1889, p. 261 (Mariannes); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 68 (Marianne, Uap, Ruk, Pelew); Oustalet, Nouv. Arch, Mus. Hist. Nat. Paris, (3), 8, 1896, pp. 38, 39 (Guam, Saypan, Ponapi, Ruk, Palaos); Hartert, Novit. Zool., 5, 1898, p. 65 (Guam); Sharpe, Cat. Birds British Mus., 26, 1898, p. 227 (Marianne, Carolines, Pelew); Hartert, Novit. Zool., 7, 1900, p. 11 (Ruk); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Prowazek, Die deutschen Marianan, 1913, p. 100 (Saipan); Cox, Island of Guam, 1917, p. 21 (Guam). _Ardetta bryani_ Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 27 (Type locality, Guam); Safford, Osprey, 1902, p. 66 (Guam); _idem_, The Plant World, p. 266 (Guam). _Ardetta sinensis sinensis_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 50 (Ruk, Pelew). _Ixobrychus sinensis bryani_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, pp. 173, 175 (Guam); Kuroda, in Momoyama, Birds Micronesia, 1922, p. 37 (Guam,?Yap,?Mackenzie,?Pelew); _idem_, Avifauna Riu Kiu, 1925, p. 134 (Guam,?Yap,?Pelew); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 202 (Guam,?Pelew); Peters, Check-list Birds World, 1, 1931, p. 121 (Guam); Hand-list Japanese Birds, rev., 1932, p. 184 (Saipan, Tinian, Rota, Guam); Oberholser, Bull. U. S. Nat. Mus., 159, 1932, p. 18 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 205 (Saipan, Tinian, Rota, Guam); Amadon, Bull. Bernice P. Bishop Mus., 186, 1945, p. 25 (Guam); Stott, Auk, 64, 1947, p. 525 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 44 (Rota, Guam). _Ixobrychus sinensis moorei_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 173 (Type locality, Uala, Truk group); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 38 (Ruk); Kuroda, Avifauna Riu Kiu, 1925, p. 134 (Ruk); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 202 (Middle Carolines); Peters, Check-list Birds World, 1, 1931, p. 121 (Truk); Hand-list Japanese Birds, rev., 1932, p. 184 (Palaus, Yap, Truk); Oberholser, Bull. U. S. Nat. Mus., 159, 1932, p. 17 (Carolines, ?Pelews); Hand-list Japanese Birds, 3d ed., 1942, p. 205 (Babelthuap, Koror, Yap, Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 44 (Truk, Peleliu). _Ixobrychus sinensis_ Hartert, Vogel pal. Fauna, 10, 1920, p. 1260 (Truk, Palau, Guam); Mayr, Birds Southwest Pacific, 1945, p. 285 (Marianas, Palau, Yap, Truk); Watson, The Raven, 17, 1946, p. 41 (Guam); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 91 (Tinian); Wharton, Ecol. Monogr., 16, 1946, p. 174 (Guam); Delacour and Mayr, Birds Philippines, 1946, p. 29 (Guam); Strophlet, Auk, 63, 1946, p. 536, (Guam); Baker, Condor, 49, 1947, p. 125 (Guam). _Ixobrychus sinensis sinensis_ Hachisuka, Birds Philippines, 1, 1932, p. 365 (Guam, Truk); Robinson and Chasen, Birds Malay Peninsula, 3, 1936, p. 195 (Marianne). _Ixobrychus sinensis palewensis_ Momiyama, Bull. Biogeogr. Soc. Japan, 2, 1932, p. 333 (Type locality, Pelew); Mathews, Ibis, 1933, p. 88 (Pelew). _Ixobrychus sinensis yapensis_ Momiyama, Bull. Biogeogr. Soc. Japan, 2, 1932, p. 333 (Type locality, Yap); Mathews, Ibis, 1933, p. 89 (Yap). _Geographic range._--Northeastern China and Japan south to Micronesia, Malaysia, Burma, India and Ceylon. Winter visitor to Papuan region. In Micronesia: Mariana Islands--Saipan, Tinian, Rota, Guam; Palau Islands--Babelthuap, Koror, Peleliu; Caroline Islands--Yap, Truk. _Characters._--Adult male: A small bittern with crown and short occipital crest slaty-black; mantle light buffy-brown; back and rump gray; tail black; wing-coverts brownish-buff; primaries and secondaries slaty-black; underparts yellowish buff; chin and throat whitish; sides of head and neck and a line of feathers across chest blackish edged with buff; bill yellowish green; feet greenish yellow. Adult female: Resembles adult male, but with upper parts mottled brown and golden chestnut; underparts deep buff streaked with pale brown on neck. Immature: Resembles adult, with upper parts heavily streaked with blackish-brown, and underparts streaked with chestnut and dark brown. _Measurements._--Measurements of specimens from Micronesia are given in table 16. TABLE 16. MEASUREMENTS OF _Ixobrychus sinensis_ FROM MICRONESIA ===========+=========+=====+=========+=======+========+======== | | | | | Full | LOCATION | Sex | No. | Wing | Tail | culmen | Tarsus -----------+---------+-----+---------+-------+--------+-------- Yap, Truk | males | 6 | 132 | 43 | 56 | 44 | | | 130-134 | 41-47 | 54-59 | 42-47 | | | | | | Guam | males | 11 | 134 | 47 | 57 | 46 | | | 127-138 | 45-50 | 55-60 | 45-47 | | | | | | Guam | females | 10 | 130 | 46 | 57 | 45 | | | 127-134 | 44-49 | 55-59 | 43-47 -----------+---------+-----+---------+-------+--------+-------- _Weights._--The author (1948: 44) records the weights of eight adult males from Guam as 82-103 (92) and eight adult females from Guam as 84-109 (95). _Specimens examined._--Total number, 69 (34 males, 27 females, 8 unsexed), as follows: Mariana Islands, USNM--Saipan, 1 (Sept. 30)--Tinian, 1 (Oct. 13)--Guam, 29 (May 16, June 4, 6, 7, 8, 14, 18, 19, July 10, 16, 18, 24, 27, Aug. 4); AMNH--Saipan, 1 (Aug. 6)--Tinian, 3 (Sept. 13)--Guam, 14 (Feb. 1, Mar. 13, 29, July 11, 13, 25, Aug. 1, 7, 13, Sept. 4, 10, Dec. 8); Palau Islands, AMNH--exact locality not given, 6 (Nov. 19, 21, 23, 25, Dec. 1, 18); Caroline Islands, USNM--Truk, 1 (Feb. 16); AMNH--Yap, 1 (not dated)--Truk, 12 (Feb. 9, Mar. 5, 17, May 7, June 13, 14, 15, Oct. 3, Nov. 1, 5, Dec. 20). _Nesting._--The author (1948:44) records a nest found by the NAMRU2 party near Achang Bay on Guam on June 6, 1945. It was found in a cane thicket at the edge of a fallow rice paddy, approximately four feet from the ground and was constructed of about three quarts of reeds and cane. Two eggs found in the nest are oval, white with a greenish cast and measure 33 by 24 and 34 by 24. On February 1, 1945, the writer found two recently occupied nests of the Chinese Least Bittern at Oca Point, Guam. These nests were in dense inkberry brush approximately five feet above the ground. The area was not marshy, the nearest water being at the beach some 300 yards away. Nearby one of the nests was found a young bittern, which apparently had only recently left the nest. The pin feathers were growing. A parent bird remained in the vicinity with the young bird until it left the area after March 9. _Food habits._--The Chinese Least Bittern feeds on animal foods obtained along waterways, marshes and beaches as well as in forests and fields. The NAMRU2 party observed several types of insects in the stomachs of birds taken at Guam. Seale (1901:27) found black crickets in stomachs of bitterns taken at Guam. Coultas (field notes) learned from the natives of the Palau Islands that the bittern feeds on land mollusks. _Parasites._--Wharton (1946:174) obtained the chigger (Acarina), _Trombicula acuscutellaris_, from the Chinese Least Bittern at Guam. _Remarks._--The Chinese Least Bittern has been regarded by many workers as consisting of several geographic races; as many as eight have been recognized. Other workers have concluded that _I. sinensis_ is made up of highly variable populations and that it lacks well-fined geographic variation. Hartert (1920:1260), Hachisuka (1932:365), and Mayr (1945a:285) have reached the latter conclusion. As yet this problem has not been satisfactorily solved; a thorough study is needed, but may not be possible until additional material, especially from the continental areas, can be obtained. In coloration there appears to be little difference between birds from the various localities in Micronesia. These birds may average slightly paler than populations from the continental areas, but on this basis I doubt that a person could recognize the Micronesian birds in a group of skins from many other localities. Birds in fresh plumage may show geographic differences better than slightly worn specimens. Measurements made by the author offer no clear-cut differences either. _I. sinensis_ was first recorded in Micronesia by Quoy and Gaimard (1824:536), whose ship, the "Uranie," stopped at Guam. They called the bird "Petit Héron aux ailes noires." Most of the ornithological collectors in the years following Quoy and Gaimard obtained this bittern in Micronesia. At Guam, its abundance and the ease with which it may be approached and shot is attested by the large series obtained by collectors: Seale (1901:27) took eight birds; Marche (Oustalet, 1896:36) took eighteen skins; the NAMRU2 party took twenty-nine skins. The Chinese Least Bittern is found in habitats associated with both salt water and fresh water, as well as in upland habitat in Micronesia. The bird appears to be well adapted to areas of open forest and coconut groves. Coultas (field notes) found the birds in taro patches in the Palaus. Although a considerable amount of field observing was done in the southern Palaus, the NAMRU2 party saw only one bird (September 13, 1945, at Peleliu). Perhaps the birds prefer Babelthuap and other large islands farther north in the chain. McElroy found bitterns in taro patches at Truk in December, 1945. The NAMRU2 party did not find any birds at Rota in October and November, 1945. Downs (1946:91) found the birds in upland sugar cane and beach habitats on Tinian. Regarding the bittern in the Palaus, Coultas (field notes) writes, "Always found alone, never a pair. A bird that is not easily frightened. In the heat of the day, one finds it standing in the shade of a taro leaf quietly viewing the intruder and very reluctant about moving. I have tossed pieces of earth and sticks at the bird to encourage him to fly so that I would not blow him to pieces when I shot, but my efforts at dislodgement have been rewarded by harsh scolding squawks. It became necessary for me to move into proper gun range. I have also found them perched in low trees at the edge of taro swamps. In flight they are atrociously awkward. They can't keep a course and their legs dangle every-which way. Their jerky, slow flight usually ends abruptly when the bird becomes entangled in weeds or the branches of trees. Extracting himself from his predicament he is soon in another and invariably resorts to blasphemy." =Ixobrychus eurhythmus= (Swinhoe) Schrenck's Least Bittern _Ardetta eurhythma_ Swinhoe, Ibis, 1873, p. 74, pl. 2. (Type locality, Amoy Shanghai.) _Ixobrychus eurythmus_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Southeastern Siberia and Japan south to India and Malaysia. In Micronesia: Palau Islands--exact locality unknown. _Specimens examined._--Total number, 3 (2 males, 1 female), from Palau Islands, AMNH--exact locality not given (Nov. 19, 21, Dec. 3). _Remarks._--Coultas obtained three immature specimens at Palau in November and December, 1931. =Dupetor flavicollis flavicollis= (Latham) Black Bittern _Ardea flavicollis_ Latham, Ind. Ornith., 2, 1790, p. 701. (Type locality, India.) _Dupetor flavicollis_ Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 26 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam). _Dupetor f. flavicollis_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Guam). _Geographic range._--Central China south to Malaysia and India. In Micronesia: Mariana Islands--Guam. _Remarks._--Seale (1901:26) records a female shot at the Agaña River on Guam on June 11, 1900. The skin probably is in the Bernice P. Bishop Museum in Honolulu. =Anas oustaleti= Salvadori Marianas Mallard _Anas oustaleti_ Salvadori, Bull. British Ornith. Club, 4, 1894, p. 1. (Type locality, Mariannis Islands.) _Anas oustaleti_ Salvadori, Cat. Birds British Mus., 27, 1895, p. 189 (Guaham); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 49 (Guam); Hartert, Novit. Zool., 5, 1898, p. 66 (Guam, Saipan); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 25 (Guam, Saipan); Matschie, Journ. f. Ornith., 1901, pp. 110, 113 (Guam, Saipan); Safford, Osprey, 1902, p. 66 (Mariannas); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 267 (Guam); Dubois, Syn. Avium, 2, 1904, p. 990 (Mariannes); Safford, Contr. U. S. Nat. Herb., 9, 1905, pp. 80, 126 (Guam); Prowazek, Die deutschen Marianen, 1913, pp. 47, 100 (Marianen); Cox, Island of Guam, 1917, p. 22 (Guam); Phillips, Nat. Hist. Ducks, 2, 1923, p. 53 (Guam, Saipan); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 214 (Guam, Saipan); Berlioz, Bull. Mus. Hist. Nat. Paris, 2d ser., 1, 1929, p. 67 (Guam); Peters, Check-list Birds World, 1, 1931, p. 159 (Guam, Tinian, Saipan); Hand-list Japanese Birds, rev., 1932, p. 184 (Guam, Tinian, Saipan); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Kuroda, Tori, 11, 1941-42, pp. 99, 443 (Marianas); Hand-list Japanese Birds, 3d ed., 1942, p. 205 (Guam, Tinian, Saipan); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 1 (Marianne); Mayr, Birds Southwest Pacific, 1945, p. 285 (Marianas); _idem_, Audubon Mag., 47, 1945, p. 282 (Marianas); Baker, Trans. 11th N. Amer. Wildlife Conf., 1946, p. 208 (Guam); Stott, Auk. 64, 1947, p. 525 (Saipan); Baker, Smithson, Misc. Coll., vol. 107, no. 15, 1948, p. 45 (Saipan, Tinian); Momiyama, Pacific Science, 2, 1948, p. 121 (Saipan, Tinian, Guam). _Polionetta oustaleti_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 39 (Guam, Saipan). _Anas superciliosa oustaleti_ Hartert, Novit. Zool., 36, 1930, p. 112 (Guam, Saipan). _Anas platyrhynchos oustaleti_ Delacour and Mayr, Wilson Bull., 57, 1945, pp. 21, 39 (Marianas). _Geographic range._--Micronesia: Mariana Islands--Guam, Tinian, Saipan. _Characters._--From study of a large series of specimens of _Anas oustaleti_, Yamashina (1948) described two types of plumages: one type resembles that of _A. platyrhynchos_ and another type resembles that of _A. poecilorhyncha_. He based his conclusions on both a study of prepared skins and observations of the molt of living specimens as reported by Kuroda (1941-1942). The following descriptions are quoted from Yamashina (1948:122). Adult male in nuptial plumage of _A. platyrhynchos_ type: "Whole head is dark green, except at the sides where buff feathers are plentifully intermingled, a dark brown streak through the eye, and faint white ring on the lower neck. Feathers on scapulars and sides of body are as those of _Anas poecilorhyncha_. Sides of body are vermiculated but some brown feathers are found even in the full nuptial plumage. Upper breast is dark reddish chestnut with dusky spots. Upper and under tail-coverts are as in _Anas platyrhynchos_. Speculum is as that of _Anas platyrhynchos_, but the tips of the greater coverts are buff instead of white. Central tail feathers are more or less curled upward. Base of bill is black, tip is olive color. Iris is dark brown. Feet, reddish-orange, webs darker." Eclipse plumage of adult male resembles that of _A. platyrhynchos_. Adult male in nuptial plumage of _A. poecilorhyncha_ type: "Resembles _Anas poecilorhyncha pelewensis_ from the Palau Islands and Truk Island, but sides of head are browner, superciliary stripes and ground color of cheeks are more buffy. Feathers on upper breast and sides of body are more broadly edged with brown. Speculum is usually violet-purple as in the _platyrhynchos_ type, but in two specimens from Saipan and Tinian, respectively, it is dark green as in _Anas poecilorhyncha pelewensis_. Tips of the secondaries are usually white, but sometimes very faint as in _Anas poecilorhyncha pelewensis_, and in one specimen from Saipan they are buffy. Bill is olive color with a black spot in the center of the upper mandible. Iris, dark brown. Feet, dark orange, darker in joints and webs." Eclipse plumage of adult male resembles the nuptial plumage. _Measurements._--Measurements of nine ducks from Guam and Saipan are: wing, 238-266 (252); tail, 75-84 (81); exposed culmen, 49-53 (51); tarsus, 41-43 (42). _Specimens examined._--Total number, 9 (5 males, 2 females, 2 unsexed), as follows: Mariana Islands, USNM--Saipan, 2 (Oct. 2, 3)--Guam, 1 (June 6); AMNH--Saipan, 2 (Aug. 7, 11)--Guam, 4 (Jan. 10, April 6, Dec. 11, 16). _Nesting._--At Guam, Seale (1901:25) found nests of the Marianas Mallard "among the reedy swamps and streams of the island." He obtained two downy young in June. Kuroda (1941-1942) reports nesting at Lake Challankanoa, Saipan, in July. He writes that nests contained 7 to 12 eggs. Ducklings and incubated eggs were obtained in June and July, but he is of the opinion that the breeding season may be longer. He notes that adults exhibit both nuptial plumage and eclipse plumage at the same time, suggesting that breeding may occur at various times in the year. A nest with seven eggs taken on July 4, 1941, at Hagoi Lake, Tinian, is described by Kuroda as having been found among rushes and constructed of dead leaves, stems, and roots and lined with down. He describes the eggs as being grayish-white with a pale greenish tinge, and measuring 61.6 by 38.9. Marshall (1949:202) saw a family of ducklings in April. _Remarks._--The Marianas Mallard is rare; probably it never has been very abundant in the small chain of islands to which it is restricted, because fresh water marshes and swamps are not extensive. The bird was first recorded by Bonaparte as _Anas boschas a. Freycineti_ in 1865. This name was a _nomen nudum_ and later the same specimen in the Paris Museum was named by Salvadori (1894) as _Anas oustaleti_. In 1888, Marche obtained six specimens at Guam; these were reported on by Oustalet (1896:49). Later collecting showed that the duck inhabited also the islands of Saipan and Tinian. There have been no records of this duck in the more northern islands of the Marianas. According to Yamashina (1948:121) in the period from 1931 to 1940, the Japanese obtained 38 specimens of the Marianas Mallard at Tinian and Saipan. In 1940, four birds from Tinian were shipped alive to Japan and kept in an aviary by Kuroda. At Tinian in 1940, one of the collectors observed two flocks of _A. oustaleti_, each containing 50 or 60 individuals. The Japanese took specimens at a lagoon area and at fresh water lakes. Yamashina describes one of the localities, Lake Hagoi on Tinian, as "a small body of fresh water surrounded by about 40 acres of marsh." During the war, servicemen reported the presence of the Marianas Mallard at both Saipan and Tinian. Moran (1946:261) counted twelve ducks at Saipan. Stott (1947:525) saw seven birds at Lake Susupe on Saipan in December, 1945. He writes that the birds were gentle and easily approached and that they preferred winding channels in reed beds to open water. Marshall obtained two ducks at Lake Susupe in early October, 1945. These specimens are in the United States National Museum. He (1949:202) found ducks at both Saipan and Tinian; twelve was the greatest number seen at any one time. Gleise (1945:220) estimated that there were twelve birds on Tinian in 1945, remarking that their habitat was swamp area. At Guam and Rota, the NAMRU2 party failed to obtain any specimens but received reports of the presence of ducks on both islands. At Guam, reports were obtained of ducks of unknown species at a fallow rice paddy in August, 1944, and in a marsh near Agat on June 13, 1945. The presence of Japanese soldiers in the interior of Guam made it inadvisable to investigate marshes and swamps of the interior and the upper courses of streams. H. G. Hornbostel, as quoted by Phillips (1923:54), reported that ducks were found at Guam only in the Tolofofo River Valley. The NAMRU2 field parties investigated the lower reaches of this valley and found no evidence of the ducks. The upper part of this valley was used as an artillery range in 1945. Probably the firing of field guns was a disturbing influence to any birds that might have been there. If the ducks were on Guam at that time, they must have been secretive and restricted in their movements. At Rota, two ducks which might have been _A. oustaleti_ were seen by the NAMRU2 party on October 20, 1945, in a cultivated field. These recent reports indicate that the Marianas Mallard is secure for the present on the islands of Saipan and Tinian, but thoughtful conservation practices need to be placed in operation to insure its survival in the future. _Evolutionary history of Anas oustaleti._--In the past, most of the studies have pointed to a northern ancestry for _A. oustaleti_. Bryan (1941:187) has noted a relationship between _A. oustaleti_ and the Laysan Duck (_A. laysanensis_ Rothschild) and the Hawaiian Duck (_A. wyvilliana_ Sclater). Amadon (1943:1) suggests that these three species of ducks are rather recent derivatives of the Common Mallard (_A. platyrhynchos_) and postulates the evolution of _A. wyvilliana_ from migrants from North America. He further states that _A. laysanensis_ and _A. oustaleti_ may have been derived from _A. wyvilliana_ or may represent independent colonizations. Delacour and Mayr (1945:21) go a step further and make these forms subspecies of _A. platyrhynchos_, saying that they are "dull-colored editions" of the Common Mallard, that because of isolation they have become reduced in size and have lost many of the characteristics of their ancestors. Recently, however, Yamashina (1948) has concluded that the Marianas Mallard has evolved as the result of hybridization between the two species, _A. platyrhynchos_ and _A. poecilorhyncha_. His conclusions are based on a study of a large number of specimens, both museum skins and captive birds, in which he has been able to detect plumages of the _A. platyrhynchos_ type and of the _A. poecilorhyncha_ type (see Characters). He has noted specimens which have ninety percent of the characteristics of _A. platyrhynchos_ and ten percent of the _A. poecilorhyncha_ type. These percentages are reversed in specimens favoring the _A. poecilorhyncha_ type. In his series of skins he finds the _A. poecilorhyncha_ type of plumage most frequently, in forty-four specimens out of fifty examined, while only six specimens have the _A. platyrhynchos_ type of plumage. Yamashina cites also as evidence favoring his conclusion that hybridization has taken place the results obtained from the crossing of captive _A. platyrhynchos_ and _A. poecilorhyncha_. It is his assumption that there has been a resident form of _A. poecilorhyncha_ in the Marianas, apparently resembling closely that which occurs in the Palaus and at Truk (_A. p. pelewensis_), and that stragglers of _A. platyrhynchos_ from the north occasionally reach the Marianas where hybridization between the two species occurs. Yamashina remarks (1948:123): "The opportunity for hybridization should occur more rarely in the south, and thus more frequent back-crossing of the hybrid with the indigenous _Anas poecilorhyncha_ on Tinian and Guam explains the superabundance there of the _poecilorhyncha_ type. As the hybridization should have taken place more frequently to the north in Saipan, the ratio of the occurrence of the _platyrhynchos_ type is logically higher there." The Common Mallard (_A. p. platyrhynchos_) has not been recorded in Micronesia, but according to Yamashina (1948:123) "winters frequently just north of the Marianas in the Bonin and Volcano Islands." This remarkable explanation for the development of the Marianas Mallard is not questioned by this author, who feels that hybridization may be found to be the cause for other unusual forms of life in island habitats whose ancestry has not been explained. As Yamashina comments, the special environments of islands together with small and restricted populations of animals are factors which could favor such development. =Anas poecilorhyncha pelewensis= Hartlaub and Finsch Australian Gray Duck _Anas superciliosa_ var. _pelewensis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 108. (Type locality, Pelew Islands.) _Anas superciliosa_ Hartlaub and Finsch, Proc. Zool. London, 1868, pp. 8, 118 (Pelew); Sclater, Proc. Zool. Soc. London, 1869, p. 659 (Pelew); Gray, Hand-list Birds, 3, 1871, p. 82 (Pelew); Salvadori, Ornith. Papuasia, 3, 1882, p. 395 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 70 (Pelew); Salvadori, Cat. Birds British Mus., 27, 1895, p. 206 (Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 50 (Palaos). _Anas superciliosa pelewensis_ Dubois, Syn. Avium, 2, 1904, p. 990 (Pelew); Mathews, Birds Australia, 4, 1915, p. 90 (Pelew); Phillips, Nat. Hist. Ducks, 2, 1923, p. 113 (Pelew); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 215 (Pelew); Hartert, Novit. Zool., 36, 1930, p. 112 (Pelew); Peters, Check-list Birds World, 1, 1931, p. 160 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 184 (Palaus, Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 205 (Babelthuap, Peliliu); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 3 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 286 (Palaus, Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 45 (Peleliu, Truk). _Anas pelewensis_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 40 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 71 (Palau). _Polionetta superciliosa pelewensis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 38 (Pelew). _Anas superciliosa rukensis_ Kuroda, "Gan to Kamo" (Geese and Ducks), 1939, page not numbered, description between pls. 52 and 53 (Type locality, Ruk); Hand-list Japanese Birds, 3d ed., 1942, p. 206 (Truk). _Anas poecilorhyncha superciliosa_ Delacour and Mayr, Wilson Bull., 57, 1945, pp. 21, 39 (no locality given); Yamashina, Pacific Science, 2, 1948, p. 122 (Palau, Truk). _Geographic range._--Islands of Micronesia, Polynesia, and Melanesia. In Micronesia: Palau Islands--Babelthuap, Peleliu; Caroline Islands--Truk. _Characters._--Adult: A medium-sized duck with upper parts dark brown, feathers edged with buff; top of head blackish merging into gray on hind neck with narrow buff line below; eye-stripe broad and blackish; lower parts uniformly dark brown to gray brown, feathers edged with buff; face, chin and throat light buff with some dark streakings; under wing white; speculum green; bill plumbeous with nail black; legs yellow-brown to yellowish, webs dusky. _A. p. pelewensis_ resembles _A. p. rogersi_ Mathews, but is smaller with a wing length averaging as much as 20 mm. shorter. _Measurements._--As given by Amadon (1943:4) seven unsexed skins from the Palaus, studied by Finsch (1875:40), have wing lengths of 207, 212, 212, 214, 223, 235, 230. For an adult male taken by Coultas at Palau, the exposed culmen measures 45 and the tarsus 37. _Specimens examined._--Total number, 3 males from Palau Islands, AMNH--exact locality not given (Oct. 26, Nov. 25). _Remarks._--_A. p. pelewensis_ is apparently rare in the Palau Islands. Coultas, who visited the Palaus in October to December, 1931, writes (field notes) that he received reports that the birds were present and nested in numbers on fresh water lakes. He took specimens in taro patches and comments that the ducks probably feed at night and have retiring habits during the day. At Peleliu in 1945, the NAMRU2 party received several reports of ducks but failed to find the birds. At Truk, in December, 1945, McElroy of the NAMRU2 party found ducks to be fairly numerous in rice paddies, marshes, and swamps. He observed that the birds roosted at Moen Island at night but that they apparently flew to outlying islands to spend the day. Richards observed ducks on Moen Island on August 28 and 29, 1947, and again in the period from January 19 to February 10, 1948. He saw several flocks of ducks including one containing "about a dozen ducks" at ponds along a roadway and at an airstrip. Kuroda named the population at Truk as distinct in 1939. I have not been able to examine his description and no specimens are available for study, but if the birds at Truk represent an independent colonization (different from that of the birds at Palau) they might exhibit recognizable variation. Amadon (1943:5) has already pointed out that the shortness of the wing of specimens in the Palaus may merit subspecific status for the population. Delacour and Mayr (1945:21) propose that the Palau Gray Duck is a subspecies of _A. poecilorhyncha_; this treatment is followed in the present work. _Evolutionary history._--_A. p. pelewensis_, as Amadon (1943:1) has stated, represents a population of mallards which became separated from the ancestral stock in the Australian or Malayan area and when once differentiated, invaded New Zealand and other parts of Polynesia, Melanesia, and southwestern Micronesia. Amadon points out that its range in the Pacific islands is more or less complimentary to that of _A. oustaleti_ in the Marianas and the Philippine Mallard (_A. poecilorhyncha luzonica_ Fraser), as well as to the Hawaiian forms (_A. wyvilliana_ Sclater and _A. laysanensis_ Rothschild). The range of _A. p. pelewensis_ gives one the impression that its present distribution may be only a stage in a gradual spreading of the species, for it certainly has not yet occupied all habitats suitable for it in southern Micronesia nor elsewhere in Oceania. As in the case of _A. oustaleti_, _A. p. pelewensis_ appears to prefer areas of fresh, and possibly brackish, water on the larger islands. _A. p. luzonica_ is a near relative of _A. p. pelewensis_ but has rufous-brown instead of buffy-brown coloring on the chin, throat, sides of head, and superciliary region. The underparts of the Philippine Mallard are much less mottled. The specula are similar. Both of these forms were probably derived from a mallard of the _A. p. poecilorhyncha_ type. =Anas querquedula= Linnaeus Garganey Teal _Anas Querquedula_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 126. (Type locality, Europe, restricted to Sweden.) _Anas querquedula_ Marshall, Condor, 51, 1949, p. 221 (Tinian). _Geographic range._--Breeds in Europe and Asia. Winters from northern Africa to New Guinea. In Micronesia: Mariana Islands--Tinian. _Remarks._--Marshall (1949:221) obtained one of a pair of these ducks which he observed "daily in April on Lake Hagoi" at Tinian. =Anas crecca crecca= Linnaeus European Teal _Anas Crecca_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 126. (Type locality, Europe, restricted to Sweden.) _Querquedula crecca crecca_ Hand-list Japanese Birds, rev., 1932, p. 185 (Pagan). _Anas crecca crecca_ Hand-list Japanese Birds, 3d ed., 1942, p. 206 (Pagan). _Anas crecca_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Geographic range._--Breeds in Iceland, northern Europe, Asia, and Aleutians. Winters south to northern Africa, Asia and Philippines. In Micronesia: Mariana Islands--Pagan. _Remarks._--The European Teal has been recorded by the Japanese at Pagan in the northern Marianas. It appears to be an uncommon winter visitor to Micronesia. =Anas crecca carolinensis= Gmelin Green-winged Teal _Anas carolinensis_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 533. (Type locality, Carolina to Hudson Bay.) _Anas carolinensis_ Reichenow, Ornith. Monatsber., 1901, p. 17 (Jaluit); Schnee, Ornith. Monatsber., 1901, p. 131 (Marshalls); _idem_, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln); Phillips, Nat. Hist. Ducks, 2, 1923, p. 235 (Marshall Islands). _Querquedula crecca carolinensis_ Hand-list Japanese Birds, rev., 1932, p. 185 (Marshall Islands). _Anas crecca carolinensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 206 (Marshall Islands). _Geographic range._--Breeds in northwestern and northcentral North America. Winters to West Indies, Central America and Mexico. In Micronesia: Marshall Islands--Jaluit. _Remarks._--_Reichenow_ (1901:17) and Schnee (1901:131) record the Green-wing Teal in the Marshall Islands. It is the only record known for Micronesia. Bryan and Greenway (1944:104) record the teal as a migrant to the Hawaiian Islands. =Anas acuta acuta= Linnaeus Pintail _Anas acuta_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 126. (Type locality, Europe, restricted to Sweden.) _Dafila acuta acuta_ Hand-list Japanese Birds, rev., 1932, p. 185 (Pagan). _Anas acuta acuta_ Hand-list Japanese Birds, 3d ed., 1942, p. 206 (Pagan). _Anas acuta_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Geographic range._--Breeds in Iceland, northern Europe and Asia. Winters south to northern Africa, Asia and Philippines. In Micronesia: Mariana Islands--Pagan, Guam; Palau Islands--exact locality unknown. _Remarks._--The Pintail has been recorded from Pagan and Guam in the northern Marianas and from the Palau Islands and is thought to be an uncommon visitor to Micronesia. At Guam, Flavin (field notes) recorded one female on October 27, 1945, and three females and two drakes on January 19, 1946. Marshall (1949:221) saw a flock of fifteen Pintails at Saipan on February 7, 1945. =Anas acuta tzitzihoa= Vieillot Pintail _Anas tzitzihoa_ Vieillot, Nouv. Dict. Hist. Nat., 5, 1816, p. 163. (Type locality, Mexico, _ex_ Hernandez.) _Anas acuta americana_ Reichenow, Ornith. Monatsber., 1901, p. 17 (Jaluit); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln). _Anas acuta_ Schnee, Ornith. Monatsber., 1901, p. 131 (Marshalls); Phillips, Nat. Hist. Ducks, 2, 1923, p. 316 (Jaluit). _Anas acuta tzitzihoa_ Hand-list Japanese Birds, 3d ed., 1942, p. 206 (Marshall Islands). _Geographic range._--Breeds in northwestern and northcentral North America. Winters south to West Indies, Panamá, and west to Hawaiian Islands. In Micronesia: Marshall Islands--Jaluit. _Remarks._--Reichenow (1901:17) and Schnee (1901:131) reported that flocks of ducks belonging to this and other American species were observed in the Marshall Islands in October, 1899, and May, 1900. This species may winter in the Hawaiian Islands, according to Peters (1931:167). If so it is not surprising that occasional visitors reach eastern Micronesia. =Anas penelope= Linnaeus Widgeon _Anas penelope_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 126. (Type locality, Europe, restricted to Sweden.) _Anas penelope_ Finsch, Ibis, 1880, pp. 332, 333 (Taluit); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln); Phillips, Nat. Hist. Ducks, 2, 1923, p. 175 (Taluit); Hand-list Japanese Birds, 3d ed., 1942, p. 206 (Tinian, Yap, Jaluit); Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Mareca penelope_ Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 56 (Jaluit); Wiglesworth, Abhandl. und Ber Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 71 (Taluit); Finsch, Deut. Ver. zum Schultze der Vogelwelt, 18, 1893, p. 458 (Marshalls); Kuroda, in Momoyama, Birds Micronesia, 1922, p. 38 (Taluit); Hand-list Japanese Birds, rev., 1932, p. 185 (Tinian, Yap, Jaluit). _Geographic range._--Breeds in Iceland, northern Europe and Asia. Winters south to Africa, southern Asia and Philippines; casual to eastern North America. In Micronesia: Mariana Islands--Tinian; Caroline Islands--Yap; Marshall Islands--Jaluit. _Remarks._--The Widgeon may be an occasional winter visitor to Micronesia. The record at Jaluit in the Marshall Islands may be questioned. =Anas clypeata= Linnaeus Shoveller _Anas clypeata_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 124. (Type locality, Coasts of Europe, restricted to southern Sweden.) _Spatula clypeata_ Hand-list Japanese Birds, rev., 1932, p. 185 (Pagan); Yamashina, Tori, 10, 1940, p. 676 (Pingelap); Hand-list Japanese Birds, 3d ed., 1942, p. 206 (Pagan, Pingelap). _Anas clypeata_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Geographic range._--Breeds in northern Europe, Asia, North America and adjacent islands. Winters to northern Africa, southern Asia, Philippines, Hawaiians, southern United States to Central America. In Micronesia: Mariana Islands--Pagan, Tinian; Caroline Islands--Ponapé, Pingelap. _Specimens examined._--One female from Mariana Islands, USNM--Tinian (Oct. 12). _Remarks._--The Shoveller is known from localities in the Marianas and in the Carolines. In the collections of the American Museum of Natural History there is a female taken by Rollo Beck at Kauehi, Tuamotu Archipelago, on March 6, 1923. A specimen examined from Tinian was taken there by Joe T. Marshall, Jr., at Lake Hogoya on October 12, 1945. Richards obtained two Shovellers (one immature male and one immature female) at Ponapé on December 21, 1947, and January 6, 1948, respectively. He found them in a pond in a bomb crater. This duck appears to be a casual winter visitor to Micronesia and other parts of Oceania. =Aythya fuligula= (Linnaeus) Tufted Duck _Anas fuligula_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 128. (Type locality, Europe, restricted to Sweden.) _Fuligula cristata_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, p. 90 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 40 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 71 (Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 50 (Mariannes, Palaos). _Fuligula fuligula_ Salvadori, Cat. Birds British Mus., 27, 1895, p. 363 (Pelew); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 26 (Micronesia); Safford, Osprey, 1902, p. 70 (Mariannes); _idem_, The Plant World, 7, 1904, p. 268 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 38 (Mariane, Pelew, Yap); _idem_, Avifauna Riu Kiu, 1925, p. 143 (Pelew, Marianne). _Marila fuligula_ McGregor, Man. Philippine Birds, 1909, p. 199 (Marianne, Pelew). _Nyroca fuligula_ Phillips, Nat. Hist. Ducks, 3, 1925, p. 234 (Guam); Hand-list Japanese Birds, rev., 1932, p. 185 (Pagan, Saipan, Palau, Yap); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Aytha fuligula_ Hand-list Japanese Birds, 3d ed., 1942, p. 207 (Pagan, Saipan, Tinian, Guam, Yap, Palau). _Geographic range._--Breeds in Iceland, Europe, northern Asia. Winters in Europe, Africa, Asia, Malaysia, and parts of Oceana. In Micronesia: Mariana Islands--Pagan, Saipan, Tinian, Guam; Palau--exact locality unknown; Caroline Islands--Yap. _Remarks._--The Tufted Duck is a winter migrant to western Micronesia. It has been recorded only a few times and may be an irregular visitor. Flavin observed a duck, which he thought to be of this species, at Guam on January 19, 1946. Marshall (1949:221) reports that two Tufted Ducks were seen at Lake Hagoi in April 1945. =Aythya valisineria= (Wilson) Canvasback _Anas valisineria_ Wilson, Amer. Ornith., 8, 1814, p. 103, pl. 70, f. 5. (Type locality, Eastern United States.) _Nyroca valilisineria_ Reichenow, Ornith. Monatsber., 1901, p. 17 (Jaluit); Schnee, Ornith. Monatsber., 1901, p. 131 (Marshalls); _idem_, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall Inseln). _Nyroca valisineria_ Phillips, Nat. Hist. Ducks, 3, 1923, p. 124 (Marshall Islands). _Aythya valisineria_ Hand-list Japanese Birds, 3d ed., 1942, p. 207 (Marshall Islands). _Geographic range._--Breeds in northwestern and northcentral North America. Winters south to Gulf States, Florida and Mexico. In Micronesia: Marshall Islands--Jaluit. _Remarks._--Reichenow (1901:17) and Schnee (1901:131) reported three species of American ducks (_Aythya valisineria_, _Anas acuta tzitzihoa_ and _Anas crecca carolinensis_) in the Marshalls in October, 1899, and May, 1900. These species may be stragglers to eastern Micronesia. =Accipiter soloënsis= (Horsfield) Chinese Goshawk _Falco Soloënsis_ Horsfield, Trans. Linn. Soc. London, 13, 1821, p. 137. (Type locality, Java.) _Accipiter soloënsis_ Hand-list Japanese Birds, rev., 1932, p. 182 (Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 203 (Yap, Rota); Mayr, Birds Southwest Pacific, 1945, p. 302 (Yap). _Geographic range._--Breeds in northern China south to Kwangtung. Winters to Malaysia. In Micronesia: Mariana Islands--Rota; Caroline Islands--Yap. _Remarks._--The Chinese Goshawk is a winter visitor to Micronesia and has been recorded at Rota and Yap. The NAMRU2 party saw several unidentified hawks in Micronesia in 1945. At Mt. Tenjo, Guam, Muennink saw a small hawk, resembling an accipiter, darting at swiftlets on June 8, 1945. At Angaur, the writer saw a small hawk flying through heavy vegetation along the rugged coast line on September 21, 1945. A hawk "_Butio_(?)" was reported at Saipan in 1945 by Moran (1946:262); this hawk may have been _Butastur indicus_ (Gmelin). Marshall (1949:221) reports seeing "three kinds of hawks" on Palau in November, 1945. Obviously, further observations and collecting will increase our knowledge of the known number of kinds of hawks which visit Micronesia. =Accipiter virgatus gularis= (Temminck and Schlegel) Asiatic Sparrow Hawk _Astur (Nisus) gularis_ Temminck and Schlegel, in Siebold, Fauna Japon., Aves, 1845, p. 5, pl. 2. (Type locality, Japan.) _Accipiter nisoides_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 166 (Guam); Hartert, Novit. Zool., 5, 1898, p. 51 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 44 (Guam); Safford, Osprey, 1902, p. 70 (Marianas). _Accipiter gularis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 39 (Guam). _Accipiter virgatus gularis_ Hand-list Japanese Birds, rev., 1932, p. 182 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 203 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Accipiter virgatus nisoides_ Bryan, Guam. Rec., vol. 13, no. 2, 1936, p. 15 (Guam). _Geographic range._--Breeds in Japan and northern China. Winters south to Philippines and Malaysia. In Micronesia: Mariana Islands--Guam. _Remarks._--Oustalet (1895:166) records a male bird shot by Marche at Guam in October, 1887. Seale (1901:44) records a specimen taken at Guam by Owston's Japanese collectors. These are the only records found for Micronesia, and the hawk may be classed as a casual winter visitor. Strophlet (1946:535) observed "a small light-throated" falcon at Guam on November 7, 1945, which may have been of this species. =Pandion haliaetus melvillensis= Mathews Osprey _Pandion haliaëtus melvillensis_ Mathews, Australian Avium Rec., 1, 1912, p. 34. (Type locality, Melville Island.) _Pandion leucocephalus_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 49 (Palau). _Pandion haliaetus leucocephalus_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 1 (Pelew). _Pandion haliaëtus cristatus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 40 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 182 (Pelew); Hand-list Japanese Birds, 3d ed., 1942, p. 203 (Palau). _Pandion haliaëtus melvillensis_ Mayr, Birds Southwest Pacific, 1945, pp. 55, 286 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 46 (Guam, Palau). _Geographic range._--Malaysia, northern Australia, Melanesia. In Micronesia: Mariana Islands--Guam; Palau Islands--Peleliu. _Remarks._--The Osprey was first recorded at Palau by Finsch (1875:49). The author (1948:46) cites records obtained by C. K. Dorsey at Peleliu in 1944 and 1945. Dorsey saw the Osprey on several occasions; the NAMRU2 party did not find the bird while on their stay there in August and September, 1945. B. V. Travis of NAMRU2 saw an Osprey at Agaña Bay, Guam, in December, 1945. He observed the bird to be carrying a fish in its talons. Flavin observed the Osprey at Guam on January 28, 1945, and on December 23, 1945. Mayr (1945a:286) says that the Osprey apparently breeds at Palau. The bird seen in the Marianas may have been _P. h. haliaetus_ (Linnaeus), a visitor from Asia, which is known to winter in the Philippines and adjacent areas. The Osprey is the only resident member of the order Falconiformes, and it is principally a fish eater. The few records of mammal and bird eating hawks in Micronesia indicate that predation on insular vertebrate populations from this source is at a minimum. The absence of this predation may have a pronounced effect on the resident land birds, particularly from the standpoint of the perpetuation of nonadaptive mutations, which might be "weeded out" under what might be considered as normal predatory pressure in continental bird populations. =Falco peregrinus japonensis= Gmelin Peregrine Falcon _Falco japonensis_ Gmelin, Syst. Nat., 1, pt. 1, 1788, p. 257. (Type locality, Off the coast of Japan.) _Falco peregrinus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 90 (Mackenzie); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 122 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 8 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 1 (Yap, Pelew); Hand-list Japanese Birds, rev. 1932, p. 182 (Yap, Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 202 (Yap, Palau); Mayr, Birds Southwest Pacific, 1945, p. 302 (Yap, Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 46 (Guam). _?Falco peregrinus calidus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 40 (Yap, Pelew). _Geographic range._--Breeds in northern Asia. Winters to southern Asia, Malaysia and Melanesia. In Micronesia: Mariana Islands--Guam; Palau Islands--exact locality unknown; Caroline Islands--Yap. _Remarks._--The Peregrine Falcon may be classed as a casual winter visitor to Micronesia. It has been recorded by Hartlaub and Finsch at Yap and Palau. A specimen from Yap was taken by Kubary in November, 1870. On November 2, 1945, at Guam as previously recorded (Baker, 1948:46) Irvin O. Buss saw a falcon alight on the superstructure of his ship. He watched it catch and eat a Common Noddy (_Anous stolidus_). As the ship approached the island, the bird flew to the rugged cliffs near Facpi Point. Strophlet (1946:535) saw a large falcon, "presumed to be a Duck Hawk," at Guam on November 16, 1945. Possibly these two observers saw the same bird. In July, 1945, Flavin observed a Peregrine Falcon at Guam. _F. p. fruitii_ Momiyama, which is known from the Volcano Islands, may occur in Micronesia. =Megapodius lapérouse senex= Hartlaub Micronesian Megapode _Megapodius senex_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 820. (Type locality, Pelew Islands.) _Megapodius senex_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 7, 118 (Pelew); Gray, Hand-list Birds, 2, 1870, p. 256 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 103 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 29, pl. 5, fig. 2, 3 (Palau); Giebel, Thes. Ornith., 2, 1875, p. 547 (Pelew); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Oustalet, Ann. Sci. Nat., (6), art. 2, 1881, pp. 63, 140, 145, 171, 175 (Pelew); Tristram, Cat. Birds, 1889, p. 30 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 58 (Pelew); Oustalet, Ann. Sci. Nat. Zool., 11, 1891, p. 196 (Peleu); _idem_, Nouv. Arch Mus. Hist. Nat. Paris, (3), 8, 1896, p. 30 (Palaos); Ogilvie-Grant, Hand-book Game-birds, 2, 1897, p. 182 (Pelew); Hartert, Novit. Zool., 5, 1898, p. 62 (Pelew); Bolau, Mitteil, Naturhist. Mus. Hamburg, 1898, p. 69 (Palau); Finsch, Sammlung wissensch. Vorträge, 14 ser., 1900, p. 659 (Palau); Matschie, Journ. f. Ornith., 1901, p. 113 (Palau); Lister, Proc. Zool. Soc. London, 1911, p. 757 (Pelew). _Megapodius laperousii_ Ogilvie-Grant (part), Cat. Birds British Mus., 22, 1893, p. 460 (Pelew); Takastukasa and Kuroda, Tori, 1, 1915, p. 51 (Pelew); Kuroda, Dobutsu. Zasshi, 27, 1915, p. 390 (Pelew); _idem_, Dobutsu. Zasshi, 28, 1916, p. 69 (Pelew). _Megapodius laperousi_ Seale (part), Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 39 (Pelew); Safford (part), The Plant World, 7, 1904, p. 265 (Pelew); Uchida, Annot. Zool. Japon., 9, 1918, pp. 486, 487 (Palau). _Megapodius laperousii_ var. _senex_ Dubois, Syn. Avium, 2, 1904, p. 787 (Pelew). _M[egapodius] lapeyrousei_ Reichenow (part), Die Vögel, 1, 1913, p. 273 (Palauinseln). _Megapodius laperousei senex_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 40 (Pelew). _Megapodius lapérouse senex_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 14 (Pelew); Takastukasa, Birds Nippon, vol. 1, pt. 1, 1932, p. 13, pl. 4, 5 (Pelew); Yamashina, Tori, 7, 1932, p. 412 (Ngesebus, Auror, Peliliu); Hand-list Japanese Birds, rev., 1932, p. 198 (Palau); Peters, Check-list Birds World, 2, 1934, p. 6 (Palau); Yamashina, Tori, 10, 1940, p. 679 (Gayangas, Arumidin); Amadon, Amer. Mus. Novit., no. 1175, 1942, p. 9 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 286 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 46 (Garakayo, Peleliu, Ngabad). _Megapodius la pérouse senex_ Hand-list Japanese Birds, 3d ed., 1942, p. 223 (Babelthuap, Koror, Auror, Ngesebus, Peliliu, Gayangas, Arumidin). _Megapodius laperouse_ Wharton and Hardcastle, Journ. Parasitology, 32, 1946, p. 294 (Garakayo). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Auror, Kayangel, Garakayo, Ngesebus, Peleliu, Ngabad, Gayangas, Arumidin. _Characters._--Adult: A small megapode with top of head near "mouse gray"; forehead, sides of face and neck, chin, and throat thinly covered with feathers of the same color; mantle and upper breast grayish-black becoming dark olive-brown on wings; lower back, rump and upper tail-coverts dark brown; tail blackish-brown; underparts grayish-brown, lighter on midline of belly; under wings dark brown; exposed skin of head reddish to yellowish-red; bill yellowish, basally blackish; legs yellowish; feet and claws black; iris tan. _Measurements._--Measurements of three adult males: wing, 178, 182, 188; tail, 55, 63; culmen, 22.7, 23.3; tarsus, 55, 56, 57; of seven adult females: wing, 171-189 (182); tail, 46-68 (58); culmen, 25-30 (27); tarsus, 45-60 (55). Takatsukasa (1932:14) lists the following measurements: males--wing, 176-181; tail, 59-67; culmen, 25.5-26.0; tarsus, 58-61; females--wing, 177-187; tail, 62-68; culmen, 24.0-26.0; tarsus, 55-58. _Specimens examined._--Total number, 23 (11 males, 8 females, 4 unsexed), as follows: Palau Islands, USNM--Koror, 1 (Nov. 28)--Garakayo, 5 (Sept. 17, 18, 19)--Peleliu, 2 (Aug. 31, Sept. 1)--Ngabad, 1 (Sept. 11); AMNH--Palau, 16 (Nov., Dec., not dated). _Nesting._--The megapodes do not incubate their eggs, but the female deposits them in a moundlike structure of sand, volcanic ash, and forest litter or some other type of soil in which there is warmth sufficient to hatch the eggs after an extended period (perhaps 40 days or more) without further attention from the parent bird. The young dig out and lead an independent existence. Several megapodes may utilize one nest site, which ordinarily is at a low elevation near a beach or lagoon. The NAMRU2 party obtained two downy chicks at Gayakayo Island on September 18 and 19, 1945. A female taken on September 1 at Peleliu contained large eggs. Coultas obtained two chicks (one in postnatal molt) in November and December, 1931. Kubary, as quoted by Takatsukasa (1932:15), says that eggs may be found in the mounds throughout the year at Palau but are found most numerously in the south-east monsoon (April to November). Yamashina (1932a:412) reports on eggs taken in 1932 as follows: eight eggs from Auror Island on January 15; one egg from Ngesebus Island on January 16; and four eggs from Peleliu Island on January 16. Takatsukasa (1932:15) states that eggs are most numerous in the mounds in the months of May and June. The chicks obtained by NAMRU2 in September were of such a size as to suggest that they too had been laid in June. Takatsukasa (1932:15) comments, "Whilst Dr. Yaichir[=o] Okada was in the Pelew Group, he found two nests on Kajangel Island, which is an uninhabited island about twelve sea-miles southeast of the island of Malacal. He says that he found two nests, one of which was obsolete and the other was in use. The first one was oval in shape; the diameter of the largest part was twenty-four feet, and the smallest part was twenty feet, and it had a height of four feet. The second one was fan-shaped, as an obstacle existed at one side of the nest, and its diameter was twelve feet and the height was a little more than four feet, and the native whom he asked to dig out the eggs got three. One of the eggs contained a well-advanced embryo and the others were not so advanced as the first one. This distance from the top of the mound to the spot where the eggs were laid was about two and a half feet, and the natives made a great deal of effort to get these eggs. These nests were found in the bush by the natives." The NAMRU2 party observed a mound on Ngabad Island, a small islet near Peleliu, on September 11. It was much like those described by Takatsukasa, being approximately six feet high and some twelve or fifteen feet across. It was not excavated. _Molt._--Birds taken in August, September and November were molting body feathers. Birds taken in December were molting wing feathers. _Food habits._--Takatsukasa (1932:16) comments, "My collector reports to me that this bird diets on insects and tender shoots which it gets from under the soil by scratching with its large and powerful feet." According to Captain Tetens, as noted by Takatsukasa, the food of the bird consists of insects and berries. Birds taken by the NAMRU2 party had the following food items in their stomachs: adult female--2 cc. seeds, grit; adult female--3 cc. crab parts, grit; adult female--2 cc. seeds, sand; male chick--1 cc. ground food, grit; female chick--1 cc. ground food, grit, in crop 3 cc. small wood roaches (Blattidae). _Parasites._--Wharton and Hardcastle (1946:294) obtained the chigger (Acarina), _Neoschöngastia yeomansi_, from the megapode at Palau. Uchida (1918:486, 487) found the bird lice (Mallophaga), _Goniocotes minor_ and _Lipeurus sinuatus_, on megapodes from the Palaus. _Remarks._--The NAMRU2 party arrived at the Palau Islands on August 23, 1945, with little notion that the megapode would be found on the war-torn island of Peleliu. As reported by the author (1946b:209 and 1948:46) we found birds in small numbers in the relatively undisturbed areas of rough coral covered by jungle and a few birds in the heavy matting of viny and brushy vegetation which was rapidly covering the battlefields. The finding of a higher population on the more isolated and relatively undisturbed offshore islets (Ngabad, Garakayo) by the NAMRU2 party was an observation similar to those of Takatsukasa (1932:15, 16) and Coultas (field notes). Takatsukasa (1932:16) remarks, "Dr. Finsch said that this Megapode frequents nearly all the islands of the Pelew Group ... but it is very noticeable that this bird has either disappeared, or only very rarely exists in the following islands: Koror, Ngarekobasanga, and especially the main island of Babelthuap." He quotes Otto Finsch as remarking that, "It seems that the bird occasionally moves from one island to another, as the bird is a good flier." Takatsukasa continues, "According to Tetens, this Megapode runs very swiftly among the bushes, and when it is startled it takes to the nearest tree.... Captain Wilson says nothing about the Megapode, but Dr. Finsch wrote that Captain Wilson is probably referring to the egg of this bird under 'Wild Fowls,' when he said that the natives of the Palaus do not eat the flesh of the birds, but they go to the woods and bring back the eggs; they do not appreciate the newly laid eggs, but they consider it as a delicacy to swallow the well advanced embryo." The NAMRU2 party found the birds to prefer rough, coral jungle where there was considerable heavy undergrowth and ground litter. The birds were located by their loud screeches and cackles but were difficult to stalk. It was best to remain quiet and let them approach within shooting distance. Young chicks were extremely active and wild. One of the two chicks taken at Garakayo was obtained by a fortunate shot as the bird was flying rapidly through the brush. The natives use them as food, and I learned of one serviceman who had worked out a technique for trapping the birds. He traded the live birds to the natives for island souvenirs. As Wilson and Takatsukasa note, the natives apparently prefer the eggs to the adults as food, and in normal times of food abundance they probably do not molest the adults but hunt for their eggs. This seems logical, since if a determined trapping program were in operation by the natives, it should not take many decades to eliminate completely the entire population. On four islands visited by the NAMRU2 party in August and September, 1945, I estimated the following populations: Garakayo--20 to 30; Ngabad--5 to 10; Peleliu--10 to 20; Angaur--less than 10. =Megapodius lapérouse lapérouse= Gaimard Micronesian Megapode _Megapodius La Pérouse_ Gaimard, Bull. Gén. Univ. Annon. Nouv. Sci., 2, 1823, 451. (Type locality, Tinian, Archipel des Mariannes.) _Megapodius La Pérouse_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, pp. 127, 693, Atlas, pl. 33 (Tinian); _idem_, Ann. Sci. Nat. Paris, 6, 1825, p. 149 (Tinian). _Megapodius La Pérousii_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, p. 127, pl. 33 (Tinian); Wagler, Isis, 1829, p. 735 (Tinian, Guam, Rota); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 46 (Tinian); Oustalet, Ann. Sci. Nat., (6), art. 2, 1881, pp. 63, 138, 140, 143, 171, 175, 176, 177 (Tinian); _idem_, Le Nat., 1889, p. 261 (Mariannes); _idem_, Ann. Sci. Nat., Zool., 11, 1891, p. 196 (Tinian, Seypan, Pagon). _Megapodius La Peyrouse_ Lesson, Man. d'Ornith., 2, 1828, p. 221 (Tinian); _idem_, Compl. de Buffon, 2d ed., 2, Ois., 1838, p. 255 and accompanying plate (Tinian). _Megapodius laperousii_ Lesson, Traité d'Ornith., 1831, p. 478 (Mariannes); Gray, Hand-list Birds, 2, 1870, p. 256 (Marian); Ogilvie-Grant, Hand-book Game-birds, 2, 1897, p. 183 (Marianne); Dubois, Syn. Avium, 2, 1904, p. 787 (Mariannes); Lister, Proc. Zool. Soc. London, 1911, p. 757 (Marianne). _Megapodius Lapeyrousii_ Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen). _Megapodius La Peyrousii_ Reichenbach, Tauben, 1861, p. 5 (Marianen). _Megapodius la-perousi_ Gray, Proc. Zool. Soc. London, 1864, p. 43 (Guam, Botta, Tinian). _Megapodius laperousi Giebel_, Thes. Ornith., 2, 1875, p. 547 (Marianae); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 39 (Marianas); Safford; Osprey, 1902, p. 68 (Tinian); _idem_, The Plant World, 7, 1904, p. 265 (Tinian); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 78 (Rota, Saipan, Pagan, Agrigan); Schnee, Zeitschr, f. Naturwisch., 82, 1912, p. 467 (Marianen); Prowazek, Die deutschen Marianen, 1913, pp. 47, 101 (Marianen); Linsley, Guam, Rec., vol. 12, no. 8, 1935, p. 249 (Rota, Saipan, Pagan, Agrigan). _Megapodius perousei_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 30 (Marianen); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 58 (Guam, Botta, Tinian, Pagon). _Megapodius laperousii_ Ogilvie-Grant (part), Cat. Birds British Mus., 22, 1893, p. 460 (Marianne). _Megapodius la perousei_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 26 (Saypan, Pagan, Rota, Agrigan, Tinian). _Megapodius laperouse_ Hartert, Novit. Zool., 5, 1898, p. 61 (Saipan, Tinian, Rota, Guam). _Megapodius laperousei_ Finsch, Sammlung wissensch. Vorträge, 14 ser., 1900, p. 660 (Marianen); Prowazek, Die deutschen Marianen, 1913, p. 87 (Marianen). _Megapodius lapeyrouse_ Matschie, Journ. f. Ornith., 1901, p. 113 (Guam, Saipan). _M[egapodius] lapeyrousei_ Reichenow (part), Die Vögel, 1, 1913, p. 273 (Mariannen). _Megapodius laperousei laperousei_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 40 (Guam, Saipan, Rota, Tinian, Pagan, Agrigan). _Megapodius lapérouse lapérouse_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 16 (Marianas); Takatsukasa, Birds Nippon, vol. 1, pt. 1, 1932, p. 6, pl. 4, 5 (Marianne); Yamashina, Tori, 7, 1932, p. 411 (Pagan Agrigan); Hand-list Japanese Birds, rev., 1932, p. 198 (Marianas); Peters, Check-list Birds World, 2, 1934, p. 7 (Marianne Islands); Yamashina, Tori, 10, 1940, p. 679 (Assongsong); Amadon, Amer. Mus. Novit., no. 1175, 1942, p. 9 (Asuncion, Saipan, Guam); Mayr, Birds Southwest Pacific, 1945, p. 286 (Marianas). _Megapodius laperousi laperousi_ Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam). _Megapodius la pérouse la pérouse_ Hand-list Japanese Birds, 3d ed., 1942, p. 223 (Assongsong, Agrigan, Pagan, Almagan, Saipan, Tinian, Agiguan, Rota, Guam). _Geographic range._--Micronesia: Mariana Islands--Asuncion, Agrihan, Pagan, Almagan, Saipan, Tinian, Agiguan, Rota, Guam. Probably extinct on Saipan, Tinian, Rota, Guam. _Characters._--Adult: Resembles _M. l. senex_, but crown slightly darker gray; back, wing-coverts and scapulars more heavily washed with olivaceous-brown; mantle less slate; underparts paler and more brownish, especially belly. (Note--The specimens examined from the Marianas are old and rather worn in appearance.) _Measurements._--Two males measure: wing 180?, 182?; tail 62, 63; tarsus 55, 55; three females: wing 181?, 181?; tail 55, 59, 62; tarsus 54, 54, 56. Takatsukasa (1932: 10) lists the following measurements: males--wing, 155-169; tail, 54-62; culmen, 22.5-24; tarsus, 51-54; females--wing, 158-170; tail, 56-65; culmen, 23-25; tarsus, 50-55. _Specimens examined._--Total number, 10 (3 males, 4 females, 3 unsexed), as follows: Mariana Islands, AMNH--Guam, 1 (June 6)--Saipan, 6 (1895)--Asuncion, 3 (1904). _Nesting._--Concerning the nest of the Micronesian Megapode in the Marianas, Takatsukasa (1932:10) writes: "The nest is a large mound of sand mixed with grass and is made in the wooded land along the seashore. The mound is over one hundred feet in circumference and a few yards in height, and is built by the united efforts of the male and female, by scratching sand and grass with their large feet. The eggs are laid in this mound and they are hatched by the heat of the sun and that produced by the fermentation of the grass, and they are never hatched by the parent birds. The egg is of a pale brown, but always stained by nesting materials." Takatsukasa (1932:11) quotes Oustalet as follows: "Specimens collected by Mr. Marche have proved that the breeding season of La Pérouse's Megapode is rather long, like the other species of the same family, it begins to breed in January or February and ends in June. Accordingly, in this period the eggs just laid, the chicks, the young and adult can be seen at one place, but Mr. Marche did not obtain any egg." Hartert (1898:61) records a chick taken on July 17. Yamashina (1932a: 411) records eggs taken in 1931 as follows: two eggs from Pagan, February 17; three eggs from Pagan, May 15; four eggs from Agrihan, June 24. The breeding season for both of the incubator birds, _M. l. senex_ and _M. l. lapérouse_, is apparently from about January to August. _Remarks._--The Micronesian Megapode was first taken in the Marianas by the expedition of the Uranie. Bérard, a member of the expedition, obtained the bird at Tinian in December, 1820. Quoy and Gaimard (1824:27), who studied the birds of this expedition, reported that according to native tradition the species was in former times widely distributed in the Marianas and domesticated by the ancient people of the islands, but that in 1819 and 1820 the birds were not numerous on Tinian and not found on Guam and Rota. Marche (in Oustalet, 1896:27) obtained twenty-three birds at Saipan, one from Rota, two from Agrihan, and five from Pagan in 1887, 1888, and 1889; it is apparent that Quoy and Gaimard missed the bird at Rota. Marche was of the opinion that the megapodes were never domesticated and that they would probably not last much longer at Saipan and Rota owing to the incessant hunting for them by the natives. As in the Palaus, the natives apparently prefer the eggs to the adults. The latest collections of these birds in the Marianas were made by the Japanese. Yamashina (1932:411) obtained eggs in 1931 at Pagan and Agrihan, and again in 1940. He (1940:679) reported birds at Assongsong (Asuncion). Takatsukasa (1932:12) says, "A collector, working for Marquis Yamashina and myself, lately procured many specimens in Saipan and Pagan." Linsley (1935:249, 250) in searching for the megapode at Guam found little evidence of the birds. He interviewed people between the ages of forty-five and eighty and only two or three remembered seeing the bird. He said he saw one or two cross the road; but I suspect that they might have been rails (_Rallus owstoni_). Service personnel stationed at various islands in the Marianas during the late war have not reported the birds. The NAMRU2 party found no trace of the bird at Guam or Rota. Joe T. Marshall, Jr. (1949:203), did not find the bird at Saipan, Tinian, or Guam in 1945. Its status on Agiguan is unknown; isolated Japanese troops present on this small island from the time of the American invasion (1944) until the armistice (1945) may have used the birds for food and depleted the population seriously. At present the birds apparently still occur on islands in the northern Marianas. It seems that if these birds are to survive, they must be given some protection. _Evolutionary history._--The genus _Megapodius_ consists, according to Peters (1934:1-7), of nine species which are distributed through the islands from the Philippines and Borneo to Australia and Melanesia. These have been redesignated under three specific names by Mayr (1938). Outlying forms occur in the Nicobar Group to the west and in Tonga (Niuafou Island) in the east and in the Palaus and Marianas to the extreme northeast. Lister (1911:757) is of the opinion that the megapodes may have reached these outlying islands by having been transported by the natives, by whom the eggs were highly valued as food. This idea is also maintained by Rutland (1896:29-30) and Christian (1926:260). Possibility and not factual evidence support this hypothesis. From their seeming ancestral stocks, _M. pritchardii_ Gray of Niuafou Island and _M. lapérouse_ of Micronesia are remarkably distinct which may indicate their early arrival at these islands and subsequent change from their ancestral stocks. Like _M. pritchardii_, the Micronesian species is smaller than its relatives to the southwest and has short, rather rounded wings, although its feet are heavily built whereas those of _M. pritchardii_ are lightly constructed. In comparing these birds with the species of megapode found in the Philippines, Celebes and Melanesia, it seems that both _M. pritchardii_ and _M. Lapérouse_ are closely related to the widespread species, _M. freycinet_, which may have been ancestral to both. The differences between _M. prichardii_ and _M. lapérouse_ indicate that they represent independent invasions. Nevertheless these megapodes may have had a wider range in Oceania in former times; man may have eliminated the birds from some islands by using their eggs. The eggs are laid in conspicuous mounds which are easily found by man. _M. lapérouse_ differs from _M. freycinet_ of New Guinea and other parts of Melanesia and the Philippines; its small size, short wing and pearl gray head are distinctive characters. It shows greatest resemblance to the subspecies in Celebes (_M. f. gilberti_) in size and to the subspecies in the Moluccas (_M. f. freycinet_) in coloring; possibly _M._ _lapérouse_ represents stock from one of these regions. Apparently the group as a whole evolved from a center of dispersal in the New Guinea area. Mayr (1942b:167) regarded all the species of _Megapodius_ as belonging to one polytypic species, except _M. lapérouse_ and _M. pritchardii_, which are allopatric species. =Coturnix chinensis lineata= (Scopoli) Painted Quail _Oriolus lineatus_ Scopoli, Del. Flor. et Faun. Insubr., fasc. 2, 1786, p. 87. (Type locality, Luzon, _ex_ Sonnerat.) _Excalfactoria sinensis_ Hartert, Novit. Zool., 5, 1898, p. 61 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 37 (Guam); Safford, Osprey, 1902, p. 68 (Guam); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 265 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 78 (Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Nelson, Proc. 1st Pan-Pacific Sci. Conf., 1921, p. 273 (Guam). _Excalfactoria chinensis lineata_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 176 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 41 (Guam); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 20 (Marianne); Hand-list Japanese Birds, rev., 1932, p. 198 (Guam); Peters, Check-list Birds World, 2, 1934, p. 96 (Guam); Bryan, Guam. Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 223 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 287 (Guam). _Excalfactoria chinensis_ Strophlet, Auk, 1946, p. 536 (Guam). _Coturnix chinensis lineata_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 47 (Guam). _Geographic range._--Philippines and parts of Malaysia. In Micronesia: Mariana Islands--Guam (introduced). _Characters._--Adult: A small quail with upper parts brown splotched with black and streaked with buff; males with face and throat black surrounded by white line, upper breast blue gray, lower breast, belly and under tail-coverts and tail near "burnt sienna"; females lighter than males, underparts pale brown, mottled with blackish on breast and sides of body; bill dark lead colored, feet yellow. _Measurements._--Three adult males from Guam measure: wing, 66, 67, 67; culmen, 9.2, 10.0, 10.3; tarsus, 18.1, 18.7, 22.6. _Weights._--Two adult males taken by NAMRU2 at Guam weigh 34.5 and 35.5 grams. _Specimens examined._--Total number, 3 males from Mariana Islands, USNM--Guam (Feb. 24, June 13, 28). _Remarks._--Seale (1901:37) writes that the Painted Quail was introduced to Guam from Manila, or the island of Luzon in the Philippine Islands, by Captain Pedro Duarty of the Spanish Army in 1894. It was a successful introduction; the bird is well adapted to the grasslands, open hillsides, and fallow rice paddies. The bird appears to offer no serious competition to native species, because there are few native birds which depend largely on this habitat. The NAMRU2 party obtained specimens at Mt. Santa Rosa and near Agat; others were seen as singles or pairs near Umatac and on Mount Tenjo. Strophlet (1946:536) observed the birds in the southern part of Guam in 1945. He found them as singles or pairs in the months of September, October and November. Wilfred Crabb reported a covey of seven birds in June, 1945. Two males taken in June had enlarged testes. Seale (1901:37) obtained a nest of seven eggs. =Gallus gallus= (Linnaeus) Red Jungle Fowl _Phasianus Gallus_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 158. (Type locality, "India orientali, Pouli condor etc.," restricted to Pulo Condor, off mouths of the Mekong.) _Phasianus Gallus_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 284 (Ualan = Kusaie). _Gallus bankiva_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 103 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 29 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 298, 353 (Ponapé, Mortlock, Ruk); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 59 (Pelew, Caroline, Marianne, Marshall); Oustalet, Nouv. Arch. Mus. Hist. Nat., Paris, (3), 8, 1896, p. 25 (Saypan, Palaos, Marshall); Hartert, Novit. Zool., 5, 1898, p. 61 (Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 38 (Marianas); Safford, Osprey, 1902, p. 70 (Marianas). _Gallus ferrugineus_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 780 (Ponapé); _idem_, Ibis, 1881, p. 114 (Ponapé, Kushai). _Gallus gallus bankiva_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 41 (Saipan, Pelew, Ponapé, Marshall). _Gallus gallus_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 21 (Micronesia); Cram, Bull. U. S. Nat. Mus., 140, 1927, pp. 238, 328 (Guam); Bequaert, Mushi, 12, 1939, p. 81 (Kusaie); _idem_, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 266 (Kusaie); Mayr, Birds Southwest Pacific, 1945, pp. 57, 286 (Marianas, Carolines, Palaus); Wharton and Hardcastle, Journ. Parasitology, 32, 1946, pp. 294, 310 (Ulithi, Garakayo); Stott, Auk, 1947, p. 525 (Saipan). _Gallus gallus domesticus_ Hand-list Japanese Birds, rev., 1932, p. 198 (Marianas, Palaus, Carolines, Marshalls). _Gallus gallus micronesiae_ Hachisuka, Tori, 10, 1939 (1940), p. 600 (Type locality, Truk, also from Pelew, Rota, Yap, Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 222 (Saipan, Rota, Babelthuap, Koror, Yap, Truk, Lukunor, Ponapé, Kusaie, Marshalls). _Gallus gallus gallus_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 47 (Peleliu, Ngabad, Garakayo, Ulithi, Truk). _Geographic range._--Southeastern Asia and Malaysia; introduced into many islands of Oceana. In Micronesia: Mariana Islands--Saipan, Rota; Palau Islands--Kayangel, Babelthuap, Koror, Garakayo, Peleliu, Ngabad, Angaur; Caroline Islands--Ulithi, Yap, Truk, Lukunor, Ponapé, Kusaie; Marshall Islands--exact locality not known. _Specimens examined._--Total number, 3 (1 male, 2 females) as follows: Palau Islands, USNM--Garakayo, 1 (Sept. 19)--Peleliu, 1 (Sept. 13)--Ngabad, 1 (Sept. 11). _Parasites._--Cram (1927:238, 328) found the round worms (Nematoda), _Dispharnyx nasuta_ and _Oxyspirura mansoni_ in birds from Guam. Bequaert (1939:81 and 1941:266) found the fly (Hippoboscidae) _Ornithoctona plicata_, on fowl from Kusaie. Wharton and Hardcastle (1946:294, 310) obtained the chiggers (Acarina), _Neoschöngastia yeomansi_ and _N. ewingi_ from fowl at Ulithi and Garakayo. _Remarks._--The Red Jungle Fowl has been introduced in Micronesia, as it has been in other parts of Oceania. It is found on many of the islands of Micronesia, including the volcanic islands and the atolls. The NAMRU2 party did not find feral fowl at Guam but found the wary birds at Ulithi and in the Palaus. The birds at Ulithi were small and of a mixed breed. At Palau some fine examples of typical jungle fowl were observed. Coultas obtained similar specimens at Ponapé and Kusaie. The natives have apparently allowed these birds to go wild, but catch them for food. These wild stocks may represent the earlier "liberations" while domestic fowl kept by natives at present appear to include several other breeds probably obtained from Europeans. The committee that prepared the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:222) points out that although many ornithologists believe the Red Jungle Fowl to be introduced in Micronesia and other parts of Oceania, it is their opinion (based on a series of more than 100 skins before them) that the population in Micronesia is racially distinct. They further comment, as did Hachisuka (1939b:600), that one may find hybrids between these birds and the domestic fowl belonging to the native peoples; this is commonly seen on the more populated islands such as Koror and Saipan. I have no doubt that these skins show distinct features; nevertheless, I am reluctant to recognize these by subspecific name, since the birds may be a mixture of domestic strains introduced by man at different times after the jungle fowl was first brought by the early Micronesians. It seems that the production of hybrids between the feral and domestic fowl, which we find there today, may have been going on ever since the European colonists arrived with their fancy breeds of chickens. =Phasianus colchicus= Linnaeus Ring-necked Pheasant _Phasianus colchicus_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 158. (Type locality, Africa, Asia = Rion.) _Phasianus torquatus_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 47 (Guam). _Geographic range._--Eastern China and northeastern Tonkin. Widely introduced into North America, Europe, and New Zealand. In Micronesia: Mariana Islands--Guam (introduced). _Remarks._--On July 4, 1945, fifty-seven Ring-necked Pheasants (sixteen cocks and forty-one hens) were liberated at Guam by personnel of the U. S. Navy. The birds were eleven weeks old when released, having been brought by plane from the hatcheries of the State Division of Game and Fish in California. Twenty-four birds were liberated at the site of CincPoa headquarters near Mt. Tenjo. Thirty-three were placed near the FEA dairy farm, approximately one and one-fourth miles west of Price School. One month after release the birds were present at the liberation sites, although there were reports that some had drifted as far away as a mile or more. The birds were not banded. This liberation has been reported on by Quinn (1946:32-33) and by the author (1946b:211 and 1948:47). In using the name _P. colchicus_, I am following Delacour (in McAtee, 1945:8) and the twenty-third supplement to the American Ornithologists' Union check-list of North American birds (Auk, 65, 1948:440). =Rallus philippensis pelewensis= (Mayr) Banded Rail _Hypotaenidia philippensis pelewensis_ Mayr, Amer. Mus. Novit., no. 609, 1933, p. 3. (Type locality, Palau Islands.) _Rallus philippensis_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 37 (Palau); _idem_, Proc. Zool. Soc. London, 1877, p. 587 (Palau); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 59 (Pelew); Finsch, Deut. Ver. zum Schulze der Vogelwelt, 18, 1893, p. 459, Palau). _Rallus pectoralis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 117, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 107 (Pelew). _Eulabeornis forsteri_ Gray (part), Hand-list Birds, 3, 1871, p. 57 (Pelew). _Hypotaenidia philippensis_ Salvadori (part), Ornith. Papuasia, 3, 1882, p. 261 (Pelew); Sharpe (part), Cat. Birds British Mus., 23, 1894, p. 39 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 42 (Pelew). _Eulabeornis philippensis?_ Mathews, Birds Australia, 1, 1910-1911, p. 199 (Pelew). _Hypotaenidia philippinensis philippensis_ Hand-list Japanese Birds, rev., 1932, p. 196 (Palau). _Rallus philippensis pelewensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 220 (Babelthuap, Koror); Mayr, Birds Southwest Pacific, 1945, p. 287 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 48 (Peleliu, Garakayo). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Arakabesan, Garakayo, Peleliu, Angaur. _Characters._--Adult: A large, slender rail with black crown streaked with brown; superciliary stripe ashy-gray, lighter toward bill; eye stripe brown becoming more rufous behind eye and on nape; chin ashy-gray; throat near "mouse gray" tinged with olive especially toward breast; breast, belly and sides barred with black and white, with a broad "tawny" band on breast; posterior part of belly and vent buffy with some barring; under tail-coverts barred with black, white, and buff; mantle black with feathers subterminally barred with white; back, scapulars, inner wing-coverts, and rump black with white spotting and feathers edged with olive brown; outer wing-coverts, secondaries, and primaries barred with black and rufous with some buffy-white on outer webs; under wing barred black and white with some brownish markings; tail with both bars and blotches of black, white, and buffy-rufous; maxilla horn-colored; mandible yellowish; feet light brown. _R. p. pelewensis_ resembles _R. p. philippensis_ Linnaeus of the Philippines, but is darker with nape more rufous-brown; upper parts marked with narrower and darker edgings to feathers and with pronounced whitish spotting. Resembles _R. p. chandleri_ (Mathews) of Celebes, but with wing shorter; more pronounced band on breast; bird darker above and below; rump and upper tail-coverts less spotted. _Measurements._--Specimens in the collection of the United States National Museum measure as follows: four adult males--wing, 130-134 (132); tail, 59-63 (61); full culmen, 30-37 (34); tarsus, 38-45 (43); four adult females--wing, 125-130 (127); tail, 54-61 (58); full culmen, 29-35 (32); tarsus, 38-42 (40). Mayr (1933c:4) lists the following measurements: twelve adult males--127-143 (134.6); tail, 54-65 (60); exposed bill, 25-28 (27.7); tarsus, 41-46 (43.5); three adult females--wing, 129, 136, 136; tail, 56, 57, 58; exposed bill, 23, 24, 25; tarsus, 40, 41, 42. _Specimens examined._--Total number, 27 (18 males, 9 females), as follows: Palau Islands, USNM--Garakayo, 4 (Sept. 18, 19, 20)--Peleliu, 4 (Aug. 27, 28, Sept. 16)--Arakabesan, 1 (Nov. 26); AMNH--exact locality not given, 18 (Oct., Nov., Dec.). _Nesting._--The condition of the gonads in specimens obtained indicates that the breeding season is principally in the fall and winter. Of adult rails taken by Coultas in October, November and December, 1931, 6 of 12 males and 3 or 4 females had enlarged gonads. In September, 1945, the NAMRU2 party obtained two adult males with swollen testes. Marshall (1949:219) recorded breeding in September and November. _Food habits._--Stomachs of rails obtained by the NAMRU2 party contained insects, seeds and small mollusks. Coultas (field notes) notes that the birds eat snails, roots and other vegetable matter. _Remarks._--_Rallus philippensis_ is geographically widespread, being found from Tasmania and Australia north to Malaysia and the Philippines west to Cocos Keeling Island east to Melanesia and western Polynesia and north to the Palau Islands. The species is divisible into several subspecies. The one in the Palaus, although distinctive, does not appear to have undergone a higher degree of differentiation (even though isolated as a small population) than any of the subspecies in Malaysia or Melanesia. Perhaps the form on Palau as well as the relatively undifferentiated _Poliolimnas cinereus_ are rather recent invaders of Micronesia, as compared with _Rallus owstoni_ and _Aphanolimnas monasa_. The Banded Rail is less secretive in habits than _Rallus owstoni_ of Guam, and neither was seen to fly. At Angaur, Peleliu and Garakayo, the NAMRU2 party found the rail in areas of swamp and marsh as well as in the rocky uplands; it probably prefers the former habitats. Several rails were observed and shot in open places, but they probably prefer to remain in dense cover. Coultas found the birds at taro patches and swamps. I watched a rail feeding along an open trail on Garakayo. The bird was eating small mollusks and other items which were in the open area. Being a true skulker, the bird would make a quick dash to the feeding place, remain only a few moments, hurriedly return to the protective cover, and then repeat the process. The best means that I found of obtaining these birds was using traps baited with peanut butter and oatmeal. The traps had to be visited frequently or the ants made short work of the captured birds. =Rallus owstoni= (Rothschild) Guam Rail _Hypotaenidia owstoni_ Rothschild, Novit. Zool., 2, 1895, p. 481. (Type locality, Guam.) _?Rallus philippinus_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 51 (Marian or Ladrone Is.). _Rallus pectoralis_ Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 157 (Guam). _Eulabeornis forsteri_ Gray (part), Hand-list Birds, 3, 1871, p. 57 (Marian). _Hypotaenidia philippensis_ Pelzeln, Ibis, 1873, p. 41 (Marianne Isl.); Salvadori (part), Ornith. Papuasia, 3, 1882, p. 261 (Marianas); Sharpe (part), Cat. Birds British Mus., 23, 1894, p. 39 (Guam). _Rallus philippinus_ Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 59 (Guam). _Hypotaenidia owstoni_ Hartert, Novit. Zool., 5, 1898, p. 62 (Guam); Safford, Osprey, 1902, pp. 41, 67 (Guam); _idem_, The Plant World, 7, 1904, p. 265 (Guam); Dubois, Syn. Avium, 2, 1904, p. 961 (Mariannes); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 42 (Guam); Hartert, Novit. Zool., 34, 1927, p. 22 (Guam); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 84 (Guam); Hand-list Japanese Birds, rev., 1932, p. 196 (Guam). _Hypotaenidia marchei_ Oustalet, Nouv. Arch. Mus. Hist. Nat., Paris, (3), 8, 1896, p. 32 (Type locality, Guam). _Hypotaenidia oustini_ Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 30 (Guam). _Rallus owstoni_ Peters, Check-list Birds World, 2, 1934, p. 166 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 220 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 287 (Guam); _idem_, Audubon Mag., 47, 1945, p. 279 (Guam); Watson, Raven, 17, 1946, p. 41 (Guam); Strophlet, Auk, 1946, p. 536 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 48 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam. _Characters._--Adult: A large rail with head, neck, and eye stripe near "mummy brown" with feathers on sides of neck tipped with "russet"; superciliary stripe to back of neck, throat and upper breast near "mouse gray"; mantle, back, scapulars, and some upper wing-coverts dark olive-brown becoming browner on rump and upper tail-coverts; wings dark with brownish spots and barred with white; lower breast, abdomen, under tail-coverts, and tail blackish with white barrings; bill lead colored; feet dark brown; tibia brown; iris red. _Measurements._--Four adult males measure: wing, 120-123 (121); tail, 46-54 (50); full culmen, 37-43 (41); tarsus, 47-51 (50); six adult females measure: wing, 108-118 (112); tail, 38-46 (42); full culmen, 36-39 (37); tarsus, 43-47 (45). _Weights._--The NAMRU2 party obtained specimens with the following weights: two adult males 256, 257; four females 147, 153, 210, 252 grams. _Specimens examined._--Total number, 13 (5 males, 6 females, 2 unsexed), from Mariana Islands, USNM--Guam (Jan. 29, May 8, June 19, 20, 23, 28, 30, July 14, 19, 23, Sept. 8). _Nesting._--A nest was found by McElroy of the NAMRU2 party at Guam on October 24, 1945, in dense grass on a hillside near Mount Santa Rosa. The nest contained three eggs, which the author (1948:48) describes as "white with a pinkish cast and a scattering of small spots of colors near 'russet' and near 'pear blue' which are concentrated at the large ends. They measure 37.5 by 29.1, 39.1 by 28.0, and 40.7 by 29.0." Downey, black chicks were found on April 1, May 16, and May 26. M. Dale Arvey found a chick on August 2, 1946, near Tumon Bay. A parent bird with young ones was seen near Merizo on October 2. A male taken on January 26 had enlarged gonads. Seale (1901:30) obtained a black chick in June or July. On the basis of the above observations it seems that the nesting season extends from spring to fall, although Marshall (1949:219) assumes that this rail breeds the year around. _Remarks._--The Guam Rail was first reported by Quoy and Gaimard who called it "Ralê tiklin," but was not described as new until 1895 by Rothschild. It appears to be equally at home in upland grassy areas and in jungle areas. The species was not seen frequently by the NAMRU2 party, although birds were occasionally observed crossing the roads. Few birds were shot; most of the specimens were taken in rat traps, which may be the most satisfactory method of obtaining them. Coultas took his specimens with the aid of a dog. On June 19, 1945, a small patch of woodland was being removed by a bulldozer. Four rails, which were hiding in this thicket, were surrounded and three were captured by hand. These birds tried to escape over the cleared ground by running with wings flapping but made no effort to fly. I am inclined to believe, as the natives do, that these birds are virtually incapable of actual flight. The Guam Rail usually appeared to be a quiet bird, but at Tarague Point on July 12, 1945, I heard its loud penetrating cry; it was a series of rapid screeches. At the same time rapid movement made considerable noise in the undercover. The bird making the call suddenly appeared, either rapidly chasing, or being chased by, another rail. The birds had abandoned their usual skulking habits and had little concern for the observer. I took this to be breeding behavior, comparable to that of some of the North American rails during the mating period. The Guam Rail is probably not in serious danger of extermination. It is utilized by the natives as food; they capture the bird, using dogs and trail snares. Its skulking habits and ability to inhabit most types of cover on the island should insure its existence for a long time to come. _Evolutionary history._--_Rallus owstoni_ is endemic to the island of Guam with no closely related forms nearby. It is one of the several rails found in the Pacific which live on isolated islands. In comparison with other species in the region, it has some resemblance to both _R. torquatus_ and _R. philippensis_. In general, the underparts of _R. owstoni_ resemble those of the _R. philippensis_ group, although the upper parts resemble somewhat those of _R. torquatus_. Certain specimens of _R. owstoni_ have a slight indication of a pale pectoral band. The bill is shorter and heavier than that of _R. torquatus_, possibly more like that of _R. philippensis_. The short rounded wing is a distinctive character. The bird came from an ancestral stock possibly resembling _R. philippensis_ and probably originated in the Philippine or Papuan areas. It may have invaded Micronesia at an early date and may have had a wider distribution in the islands in former times. Perhaps this same invasion resulted in the establishment of _R. wakensis_ (Rothschild) at Wake. The supposed route of colonization is shown in figure 9. [Illustration: FIG. 9. Routes of dispersal of rails in the Pacific area.] =Rallina fasciata= (Raffles) Malay Banded Crake _Rallus fasciatus_ Raffles, Trans. Linn. Soc. London, 13, pt. 2, 1822, p. 328. (Type locality, Benkulen, western Sumatra.) _Rallina fasciata_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 7, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 106 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 37 (Palau); Salvadori, Ornith. Papuasia, 3, 1882, p. 264 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 60 (Pelew); Sharpe, Cat. Birds British Mus., 23, 1894, p. 75 (Pelew); Finsch, Deut. Ver. zum Schutze der Vogelwelt, 18, 1893, p. 459 (Palau); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 41 (Pelew); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 88 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 196 (Palau); Peters, Check-list Birds World, 2, 1934, p. 171 (Pelew); Hand-list Japanese Birds, 3d ed., 1942, p. 221 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 287 (Palau); Delacour, Birds Malaysia, 1947, p. 77 (Palau). _Geographic range._--Burma east and south to Malaysia and the Philippines. In Micronesia: Palau--exact locality unknown. _Remarks._--The Malay Banded Crake is known in the Palau Islands from birds taken by captains Tetens, Heinsohn, and Peters and by Kubary according to Finsch (1875: 37). It has not been taken by later collectors. Two unsexed and undated skins are in the collection of the American Museum of Natural History; these are from the Kubary collection. =Rallina eurizonoides eurizonoides= (Lafresnaye) Philippine Banded Crake _Gallinula eurizonoïdes_ Lafresnaye, Rev. Zool., 1845, p. 368. (No locality; the type agrees with specimens from the Philippine Islands.) _Rallina eurizonoides eurizonoides_ Hand-list Japanese Birds, rev. 1932, p. 196 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 221 (Koror). _Rallina eurizonoides_ subsp. Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Philippine Islands. In Micronesia: Palau Islands--Koror. _Remarks._--This crake is apparently a straggler to western Micronesia from the Philippine area. =Aphanolimnas monasa= (Kittlitz) Kusaie Black Rail _Rallus monasa_ Kittlitz, Denks. Riese russ. Amer. Micron. und Kamchat., 2, 1858, p. 30. (Type locality, Kushai.) _Rallus tabuensis?_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 286 (Ualan). _Ortygometra tabuensis_ Finsch, Journ. f. Ornith., 1880, pp. 297, 307 (Kuschai); _idem_, Ibis, 1881, pp. 106, 109 (Kushai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 60 (Ualan). _Kittlitzia monasa_ Hartlaub, Abhandl. nat. Ver. Bremen, 12, 1892, p. 391 (Kuschai); Finsch, Mitth. Ornith. Ver. Wien, 17, 1893, p. 1 (Kuschai). _Aphanolimnas monasa_ Sharpe, Bull. British Ornith. Club, 1892, p. 20 (Kuschai); Finsch, Deut. Ver. zum Schulze der Vogelwelt, 18, 1893, p. 457, pl. 4 (Ualan); Wiglesworth, Ibis, 1893, p. 214 (Kushai); Sharpe, Cat. Birds British Museum, 23, 1894, p. 115 (Kushai); Matschie, Journ. f. Ornith., 1901, pp. 110, 113 (Ualan); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 93 (Caroline Islands); Hand-list Japanese Birds, rev., 1932, p. 197 (Kusaie); Peters, Check-list Birds World, 2, 1934, p. 189 (Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 221 (Kusaie); Mayr, Birds Southwest Pacific, 1945, p. 288 (Kusaie); _idem_, Audubon Mag., 47, 1945, p. 280 (Kusaie). _Porzana tabuensis_ Sharpe, Cat. Birds British Mus., 23, 1894, p. 111 (Kushai). _Pennula monasa_ Dubois, Syn. Avium, 2, 1904, p. 969 (Kuschai). _Porzana tabuensis tabuensis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 42 (Kusaie). _Geographic range._--Micronesia: Caroline Islands--Kusaie (probably extinct). _Characters._--Sharpe (1894:115) gives the following description: "Adult. Black with a bluish-grey reflexion; quills and tail somewhat browner; inner wing-coverts brownish with white spotting, outer edge of first primary dull brownish, chin and middle of the throat somewhat paler; bill blackish (Hartlaub.)." _Remarks._--Two specimens of this rail are known. The two were taken by Kittlitz on his visit to Kusaie in December and January of 1827-'28. Coultas made a search for the bird in 1931 and failed to obtain it; he suggested that the high population of introduced rodents may have been a factor contributing to its extinction. The bird is considered to be extinct by the authors of the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:221). The two known specimens are in Leningrad, and Mayr sent examples of _Porzana tabuensis_ there for comparison. The following is a translation of the letter received by Mayr from Boris Stegmann dated at Leningrad, December 7, 1937. "I have compared the two specimens of _Porzana tabuensis_ with our specimens of _Aphanolimnas monasa_. The difference is in my opinion of generic value. _Aphanolimnas_ is distinctly larger and more robust. The bill is not only absolutely but also relatively longer. Its length (measured from the forehead) reaches to the end of the second phalanx of the middle toe while it not nearly reaches it in _tabuensis_. The proportions of feet and toes are the same in both, but the feet are distinctly heavier in _Aphanolimnas_. The wings are relatively shorter in _Aphanolimnas_ and the wing feathers are very soft. The wing is also much more rounded, the first primary is about 21 mm. shorter than the wing tip. The tail consists of very soft loose feathers which resemble only distantly true tail feathers. It is therefore questionable whether this bird was at all able to fly. "The coloration is in general dull black, brownish black on head and wings, chin and upper throat are dark slate colored lighter in the middle. The under wing and tail-coverts are marked with scattered white spots (querflecken). The first primary has an irregular whitish brown margin on the outer web. The bill is dark and the feet yellowish." Possibly this rail represents an ancient colonization of Kusaie from an ancestral stock of _Porzana_ in Polynesia. Mayr (1941b:203) is also of this opinion, and if this is true there is no close relationship between _Aphanolimnas_ and the rails at Guam and Wake, _Rallus owstoni_ and _R. wakensis_, which are probably colonizers from the Philippines or the Papuan area. Mayr (1943:46) remarks further that the Hawaiian flightless rail (_Peuula_) is of doubtful taxonomic position, but may be related to the "_Aphanolimnas_-_Porzanoidea_-_Nesophylax_ stock," although there is no evidence that _Pennula_ is not related to _Rallus_. Supposed colonization routes are shown in figure 9. =Poliolimnas cinereus micronesiae= Hachisuka White-browed Rail _Poliolimnas cinereus micronesiae_ Hachisuka, Bull. British Ornith. Club, 59, 1939, p. 151. (Type locality, Yap.) _Ortygometra quadristrigata_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 90, 107 (Pelew, Uap). _Ortygometra cinerea_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 38 (Palau, Yap); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); Salvadori, Ornith. Papuasia, 3, 1882, p. 273 (Yap, Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 61 (Pelew, Yap, Ruk); Finsch, Deut. Ver. zum Schulze der Vogelwelt, 18, 1893, p. 459 (Palau). _Ortygometra cinerea = quadristrigata_ Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk). _Poliolimnas cinereus_ Sharpe, Cat. Birds British Mus., 23, 1894, p. 130 (Pelew, Yap, Ruk); Hartert, Novit. Zool., 5, 1898, p. 64 (Guam); _idem_, Novit. Zool., 7, 1900, p. 9 (Ruk); Scale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 30 (Guam); Safford, Osprey, 1902, p. 67 (Mariannes); _idem_, The Plant World, 7, 1904, p. 265 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 42 (Guam, Pelew, Yap, Ruk). _Porzana cinerea_ Stresemann, Novit. Zool., 21, 1914, p. 54 (Guam, Truk). _Porzana cinerea ocularis_ Hartert, Novit. Zool., 31, 1924, p. 264 (Ruk, Guam). _Poliolimnas cinereus collingwoodi_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 95 (Pelew, Marianne, Carolines); Hand-list Japanese Birds, rev., 1932, p. 197 (Guam, Koror, Yap, Truk); Hachisuka, Birds Philippine Islands, 1, 1932, p. 236 (Marianne, Pelew, Caroline); Peters, Check-list Birds World, 2, 1934, p. 198 (Marianne, Caroline, Pelew); Bryan, Guam Rev., vol. 13, no. 2, 1936, p. 15 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 288 (Guam, Palau, Yap, Truk, Bikini); Delacour and Mayr, Birds Philippines, 1946, p. 64 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 48 (Ulithi?, Truk). _Porzana cinerea collingwoodi_ Rensch, Mitt. Zool., 1931, p. 468 (Marianne, Karolinen, Palau). _Poliolimnas cinereus micronesiae_ Yamashina, Tori, 10, 1940, p. 679 (Bikini); Hand-list Japanese Birds, 3d ed., 1942, p. 221 (Guam, Babelthuap, Koror, Yap, Truk, Bikini). _Geographic range._--Micronesia: Mariana Islands--Guam; Palau Islands--Koror, Babelthuap; Caroline Islands--Yap, Ulithi?, Truk; Marshall Islands--Bikini. _Characters._--Adult: A slightly built, long-legged rail with forehead and anterior crown light gray with darker, slate-colored feather shafts; color more olive-brown on occiput and nape; eyestripe dark slate extending to occiput; superciliary from bill to eye, and stripe below eye, white; chin and throat ashy-white; sides of head, neck and breast ashy-gray, lighter on breast and whitish on abdomen; sides of abdomen ashy-brown becoming more buffy on tibia and under tail-coverts; mantle olive-colored becoming lighter and more brownish on back, rump, and scapulars; wing-coverts similar in color but feathers with broad dark brown shaft-marks; wings brown, first primary with whitish outer web; under wing gray with some lighter streaks; tail dark brown, lighter on edges; bill horn colored, tan below; feet brown; iris vermillion. Immature: Resembles adult, but head more rufous, upper parts marked with buffy rufous; eye stripe light rufous-brown; underparts tinged with rufous. _P. c. micronesiae_ differs from _P. c. collingwoodi_ Mathews of the Philippines by having more pale gray and less olivaceous-brown on the nape and shoulder; darker on the under tail-coverts; and having a shorter culmen. _P. c. brevipes_ (Ingram) of the Volcano Islands differs from _P. c. micronesiae_ by being paler on upper parts, particularly back and wing-coverts and more washed with buff below; by having a shorter, thicker culmen; and by having a shorter tarsus. _Measurements._--Measurements are shown in table 17. TABLE 17. MEASUREMENTS OF THREE SUBSPECIES OF _Poliolimnas cinereus_ ========================+=====+========+=======+===========+=========== LOCALITY | No. | Wing | Tail | Culmen | Tarsus ------------------------+-----+--------+-------+-----------+----------- _Poliolimnas cinereus | | | | | collingwoodi_ | | | | | Philippines, | 13 | 98 | | 22.5 | 38.0 Talaut. Celebes | | 92-108 | | 21.0-24.0 | 35.0-41.0 | | | | | _Poliolimnas cinereus | | | | | micronesiae_ | | | | | Guam | 10 | 95 | 51 | 21.0 | 37.0 | | 91-102 | 50-53 | 20.0-22.5 | 34.5-39.0 | | | | | Palau | 10 | 93 | 51 | 21.0 | 37.0 | | 89-95 | 51-53 | 20.0-23.0 | 34.0-38.0 | | | | | Truk | 5 | 95 | 51 | 21.0 | 36.0 | | 94-97 | 51-53 | 20.5-22.5 | 35.0-37.0 | | | | | _Poliolimnas cinereus | | | | | brevipes_ | | | | | S. Dionisio Island | 8 | 96 | | 19.0 | 30.0 | | 94-97 | | 17.0-20.0 | 29.0-32.0 ------------------------+-----+--------+-------+-----------+----------- _Specimens examined._--Total number, 25 (11 males, 13 females, 1 unsexed), as follows: Mariana Islands, AMNH--Guam, 10 (July 13, Aug. 1, 5, 7, 13, 19, 23, 31); Palau Islands, AMNH--exact locality not given, 10 (Nov. 11, 13, 15, 23, 25); Caroline Islands, AMNH--Truk, 5 (June 3, 8, 16, 17, 18). _Nesting._--Hartert (1900:9) describes two nests found on swampy ground. One contained three eggs, the other four eggs. He writes, "The eggs are pale buff, or cream-colour, speckled all over with brownish rufous, more frequently near the broad end. In some eggs, these spots are larger, in others minute, and there are often some, underlying pale purplish gray spots." _Remarks._--Superficially, the White-browned Rail of Micronesia is distinct from its near relative, _P. c. collingwoodi_, but the differences are not so well marked as they are between insular populations of other species of rails. It is probably a comparatively recent addition to the Micronesian avifauna, and its pattern of distribution may represent an early stage in the development of endemism in contrast to the pattern of later stages in the development of insular forms shown by the isolated rails, _Rallus owstoni_ and _Aphanolimnas monasa_. The fact that _Poliolimnas cinereus_ is found only on widely separated islands in Micronesia does not necessarily mean that it has become "extinct" on the intervening islands, but that it may be partial to the larger, "high" islands, or that it is actually present but remains to be discovered on these intervening islands when more intensive field investigations are made. Hachisuka (1939a:151), in naming the Micronesian form, comments that it has a shorter bill than _P. c. collingwoodi_ of the Philippines and Celebes, and that it is intermediate between this subspecies and _P. c. brevipes_ of the Volcano Island to the north. Within these three subspecies there are trends toward a shorter culmen and shorter tarsus and, less markedly, toward a shorter wing. From the evidence at hand, it can be concluded that _Poliolimnas_ first colonized Micronesia probably from the Philippine area (or Papuan area) through the Palaus and Carolines, to the Marianas and north to the Volcano Islands. Further, this has probably been a relatively recent invasion, although the subspecies in the Volcano Islands shows marked change in length of tarsus and culmen. This extension of range to the islands north of the Marianas is unusual and resembles somewhat the distribution of _Nycticorax caledonicus_ in the same general area. The Micronesian White-browed Rail is a shy bird with the typical skulking habits of most rails. The NAMRU2 party did not find the bird at Guam, although reports were obtained that it was present in the marsh and swamp areas. Coultas (field notes) tells of observing the rail at Palau at a fresh water lake on Babelthuap, where it was difficult to obtain and apparently rare. Seale (1901:30) obtained a female specimen at Guam from native boys who snared it in a sweet potato patch near the Agaña River. This bird, taken in June or July, had eggs ready for laying. McElroy of the NAMRU2 party observed rails at Truk in brackish swamps, where he found them to be fairly common. A male which was taken in December had enlarged gonads. At Asor in the Ulithi Atoll, the NAMRU2 party learned that a small rail (possibly of this species) was found at taro patches in the early days of occupation, but that it was apparently eliminated by clearing operations. The taking of a bird at Bikini, as reported by Yamashina (1940:679), is further evidence that these birds may subsist on coral atolls as well as on the high volcanic islands; possibly the bird of the Marshalls may have been derived from the south rather than from the west. Unlike _Rallus owstoni_, this bird is apparently restricted to swampy areas, and may be eliminated from its habitat by drainage or clearing by man. It may always persist, however, in the taro patches maintained by the natives. =Gallinula chloropus= subsp. near =orientalis= Horsfield Gallinule _Gallinula orientalis_ Horsfield, Trans. Linn. Soc. London, 13, 1821, p. 195. (Type locality, Java.) _Gallinula chloropus indicus_ Hand-list Japanese Birds, rev., 1932, p. 197 (Babelthuap); Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 266 (Pelew, Coror). _Gallinula chloropus indica_ Hand-list Japanese Birds, 3d ed., 1942, p. 221 (Babelthuap). _Gallinula chloropus_ subsp. Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 49 (Peleliu, Angaur). _Geographic range._--Malaysia from southern Malay Peninsula to Celebes. In Micronesia: Palau Islands--Babelthuap, Koror, Peleliu, Angaur. _Characters._--Adult: Resembles _G. c. indica_ Blyth, _G. c. lozanoi_ Lletget and _G. c. guami_ Hartert, but smaller and paler; upper wing-coverts less olivaceous-brown and more slate-colored; back, rump, and scapulars less richly washed with olivaceous-brown. Resembles _G. c. orientalis_ from Java in size, but much paler. _Measurements._--An unsexed adult bird from Angaur measures: wing, 150; bill from rictes, 27.1; bill from nostril, 13.4; tarsus, 46. _Specimens examined._--Total number, 3 (2 males, 1 unsexed) from Palau Islands, USNM--Angaur (Sept. 21). _Remarks._--Owing to the lack of sufficient material, I am unable to determine the exact status of the resident gallinule in the Palau Islands. On the basis of a single, unsexed adult and two immatures there is not very much that can be said. The adult is smaller and paler than _G. c. indica_, _G. c. lozonoi_, and _G. c. guami_. It resembles specimens of the subspecies _G. c. orientalis_ in size but is also paler than the skins of this race which I have examined. It seems closest to this latter subspecies to which I tentatively refer it. If it is closest to this subspecies, it probably reached Palau from the Celebean region, rather than from the Philippines or some other route. Whether specimens taken by the Japanese at Babelthuap and Koror are _G. c. indica_ is questionable, unless the skins were from migrants which may visit Palau from the west or northwest. The Hand-list of Japanese Birds (Hachisuka _et al._, 1942:177) records _G. c. indica_ from the Bonin Islands. The three Gallinules were taken by the NAMRU2 party at fresh and brackish water swamps at Angaur on September 21, 1945. Several Gallinules were seen in the area and several were observed also at Peleliu Island. One of the immatures was just growing its wing feathers, indicating that the birds must breed in the Palau Islands. =Gallinula chloropus guami= Hartert Gallinule _Gallinula chloropus guami_ Hartert, Novit. Zool., 24, 1917, p. 268. Type locality, Guam). _Fulica chloropus_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, p. 703 (Guam); Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 305 (Guahan). _Gallinula galeata_ var. _sandwichensis_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 34 (Saypan, Tinian, Guam). _Gallinula chloropus_ Hartert, Novit. Zool., 5, 1898, p. 62 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 31 (Guam); Safford, Osprey, 1902, p. 67 (Marianas); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 265 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Prowazek, Die deutschen Marianen, 1913, p. 101 (Marianen); Cox, Island of Guam, 1917, p. 21 (Guam); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 177 (Guam); Strophlet, Auk, 63, 1946, p. 536 (Guam). _Gallinula chloropus guami_ Hartert, Vögel pal. Fauna, 15, 1921, p. 1843 (Guam); Kuroda, Avifauna Riu Kiu, 1925, p. 199 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 43 (Guam, Tinian, Saipan); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 99 (Mariana Islands); Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 226 (Pagan); Hand-list Japanese Birds, rev., 1932, p. 197 (Guam, Tinian, Saipan, Pagan); Hachisuka, Birds Philippine Islands, 1, 1932, p. 241 (Guam); Peters, Checklist Birds World, 2, 1934, p. 204 (Marianne Islands); Bryan, Guam. Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 222 (Guam, Tinian, Saipan, Pagan); Mayr, Birds Southwest Pacific, 1945, p. 288 (Marianas); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 92 (Tinian); Stott, Auk, 1947, p. 525 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 49 (Guam, Tinian, Saipan). _Geographic range._--Micronesia: Mariana Islands--Pagan, Saipan, Tinian, Guam. _Characters._--Adult: Head and neck sooty black; upper back dark, bluish slate-gray; lower back and wing-coverts brownish; tail blackish-brown; wings dark brown, outer edge of first primary white; breast and upper abdomen dark slate-gray, feathers on sides of breast with longitudinal white streak; under wing dark with white edges; lower abdomen grayish with white-tipped feathers; vent black; under tail-coverts white; bill and frontal shield red, tip of bill yellowish; legs and feet olive-green. Adult female: Resembles adult male but usually with smaller frontal shield. Immature: Resembles adult, but forehead mottled white and brown, with sides of head less distinctly speckled with brown; crown, neck and upper back dusky brown; back, scapulars and upper tail-coverts olivaceous-brown; chin and throat whitish; breast feathers pearly-gray tipped with white; abdomen white; sides gray, washed with buff. Older birds are darker above and more brownish-gray below; frontal shield small. _G. c. guami_ resembles _G. c. indica_, but upper wing-coverts darker and near "olivaceous black"; back, rump and scapulars darker and less olivaceous brown, although not so dark as in _G. c. orientalis_. From _G. c. lozanoi_, _G. c. guami_ differs in: slightly darker upper wing-coverts; richer olivaceous-brown on back, scapulars and rump; thinner culmen with possibly less yellow coloring on tip. _G. c. guami_ resembles _G. c. sandvicensis_ Streets of the Hawaiian Islands, but has less olive wash on the feathers and a smaller frontal shield. _Measurements._--Measurements of _Gallinula chloropus_ are presented in table 18. In general, females are smaller than males. TABLE 18. MEASUREMENTS OF _Gallinula chloropus_ =====================+=====+=========+========+===========+======== | | | Bill | Bill | SUBSPECIES | No. | Wing | from | from | Tarsus | | | rictus | nostril | ---------------------+-----+---------+--------+-----------+-------- _G. c. indica_ | 15 | 164 | 27 | 14.4 | 48 | | 158-173 | 24-29 | 13.1-18.1 | 44-50 | | | | | _G. c. orientalis_ | 3 | 152 | 27 | 13.8 | 45 | | 146-152 | 26-29 | 13.1-14.4 | 44-46 | | | | | _G. c. lozanoi_ | 11 | 164 | 27 | 14.5 | 50 | | 153-170 | 24-29 | 13.1-15.2 | 45-57 | | | | | _G. c. guami_ | 11 | 164 | 27 | 14.7 | 49 | | 156-171 | 24-28 | 13.1-16.2 | 47-56 | | | | | _G. c. sandvicensis_ | 2 | 150-158 | 27 | 13.4 | 52-56 ---------------------+-----+---------+--------+-----------+-------- _Weights._--From Guam an adult male weighed 291 grams and an adult female 256 (Baker, 1948:49). _Specimens examined._--Total number, 42 (16 males, 22 females, 4 unsexed), as follows: Mariana Islands, USNM--Guam, 5 (Feb. 24, May, June 5, 7, 18--Tinian, 3 (Oct. 12, 18)--Saipan, 3 (Sept. 28, 30); AMNH--Guam, 25 (Feb. 21, April 6, July 13, 28, 30, Aug. 1, 3, 6, 7, 13, 19, 23, 30, 31, Sept. 3, 17, Dec. 11--Tinian, 5 (June 11, Sept. 12, 13, 14). _Nesting._--Hartert (1898:63) reports nests of the Gallinule at Guam in grass and on swampy ground in December and March. A male with enlarged gonads was taken by the NAMRU2 party at Guam on June 7. Marshall (1949:219) is of the opinion that this bird breeds all year. _Food habits._--Seale (1901:31) found grass, insects, and larvae in stomachs obtained at Guam. _Remarks._--The subspecies _G. c. indica_, _G. c. lozanoi_, _G. c. guami_, and _G. c. sandvicensis_ bear a close resemblance to one another in size and color. _G. c. guami_ and _G. c. lozanoi_ resemble each other so closely that it would be difficult to separate unlabeled specimens of the two subspecies. _G. c. orientalis_ differs from all of the gallinules in smaller size and darker color. Study of these forms indicates that the Gallinule has colonized the Marianas from Asia probably by way of Japan and the Bonin and Volcano islands. The Hawaiian subspecies is probably of American origin, as pointed out by Mayr (1943:46), and is not a close relative of the Mariana subspecies. The fact that these insular subspecies have not undergone much differentiation does not necessarily mean that they are recent arrivals, but probably is a reflection of the lack of plasticity of the species; as a whole the species does not exhibit anywhere a great amount of geographic variation. A thorough study of all insular populations of this species (including specimens from the Azores, Seychelles, Réunion, Mauritus, and the Greater and Lesser Antilles) might reveal the effect of isolation on the species in general. Its ability to become established on isolated islands is apparent, although it is indeed peculiar that the species has not reached the Caroline Islands. The Gallinule in the Marianas is restricted to fresh water lakes, marshes and swamps on the islands of Guam, Tinian, Saipan and Pagan. Coultas (field notes), on visiting the island of Tinian in 1931, comments that the bird is rare and found at only one lake on the island. Downs (1946:92) noted the species in 1945, and Joe T. Marshall Jr. obtained three specimens at Lake Hagoya in October of the same year. Gleise (1945:220) estimated the population of Gallinules on Tinian in 1945 at 70 individuals. Stott (1947:525) reports that the birds were abundant at Lake Susupe, Saipan, in 1945. Seale (1901:31) found the Gallinule to be abundant at Guam in marshes and taro patches. In 1945, the NAMRU2 party found fairly large populations of the Gallinule in fresh water marshes and fallow rice paddies at Guam. The greatest concentration of birds appeared to be in the Agaña Swamp and along the Ylig River. They seldom ventured out into open water but preferred weedy edges into which they could suddenly dart when disturbed. It was interesting to note such wary behavior, for an observer would think that after the bird had been in an environment virtually devoid of birds of prey (except for an occasional migrant) for a number of generations, it would have lost such behaviorisms as a result of the absence of the selective processes involved in predation. =Porphyrio porphyrio pelewensis= Hartlaub and Finsch Purple Swamphen _Porphyrio melanotus_ Temm. var. _pelewensis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 107. (Type locality, Pelew Islands.) _Porphyrio melanotus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 117, 118 (Pelew); Gray, Hand-list Birds, 3, 1871, p. 64 (Pelew). _Porphyrio melanotus pelewensis_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 61 (Pelew); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 70 (Palau); Dubois, Syn. Avium, 2, 1904, p. 976 (Pelew); Mathews, Birds Australia, 1, 1911, p. 241 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 43 (Pelew); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 100 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 197 (Palau); Hachisuka, Birds Philippines, 1, 1932, p. 245 (Pelew). _Porphyrio pelewensis_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 39 (Palau); Salvadori, Atti Accad. Sci. Torino, 14, 1879, p. 1169 (Pelew); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Finsch, Deut. Ver. zum Schutze der Vogelwelt, 18, 1893, p. 459 (Palau); Sharpe, Cat. Birds British Mus., 23, 1894, p. 206 (Pelew); Nehrkorn, Nat. Eiers., 1899, p. 205 (Palau-Inseln); Matschie, Journ. f. Ornith., 1901, p. 113 (Palau); Reichenow, Die Vögel, 1, 1913, p. 216 (Palauinseln); Takatsukasa and Kuroda, Tori, 1, 1915, p. 51 (Pelew). _Porphyrio cyanocephalus_ Elliot, Stray Feathers, 7, 1878, pp. 10, 13 (Palau). _Porphyrio poliocephalus pelewensis_ Peters, Check-list Birds World, 2, 1934, p. 208 (Pelew); Hand-list Japanese Birds, 3d ed., 1942, p. 222 (Koror). _Porphyrio porphyrio pelewensis_ Mayr, Birds Southwest Pacific, 1945, p. 288 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 49 (Angaur). _Geographic range._--Micronesia: Palau Islands--Koror, Angaur. _Characters._--Adult: A large, purplish-blue, marsh bird with crown and sides of head dusky-black; wing-coverts purplish-blue; rest of upper parts dark, washed with olivaceous-brown; outer webs of primaries and secondaries tinged with purplish-blue; chin, axillaries and under wing-coverts dusky; under tail-coverts whitish; rest of underparts purplish-blue, blacker on abdomen. _Porphyrio p. pelewensis_ resembles _P. p. palliatus_ Bruggemann of Celebes and _P. p. melanopterus_ Bonaparte of the Moluccas and New Guinea but upper parts paler and slightly less glossy; lesser and primary wing-coverts more purplish-blue and less greenish-blue; outer webs of primaries and secondaries lighter purplish-blue; underparts less blue with patch on throat and breast paler blue with less green (patch present on only one specimen from the Palaus). _Measurements._--Measurements of one male: wing, 227; tail, 81; culmen and shield, 62.5; tarsus, 77; of three females: wing, 212, 218, 227; tail, 77, 81, 86; culmen and shield, 57, 61, 64; tarsus, 75, 75, 77. _Specimens examined._--Total number, 6 (1 male, 3 females, 2 unsexed), as follows: Palau Islands, USNM--Angaur, 1 chick (Sept. 21) AMNH--exact locality not given, 5 (Nov. 13, 19, Dec. 17-19, undated). _Nesting._--A black, downy chick was captured on September 21, 1945, at the edge of a fresh-water lake on Angaur by Davidson of the NAMRU2 party (Baker, 1948:49). Two females taken by Coultas in December had enlarged gonads. _Remarks._--The Purple Swamphen in the Palaus stands out as one of the more distinctive subspecies of _P. porphyrio_. It also marks the most northeastern extension of the range of this species. The subspecies in the Palaus shows affinities to that found to the south and southwest and probably reached Micronesia via the Papuan area, Celebes or the Moluccas rather than from the Philippines. It is interesting that this bird, as well as several other species, has been able to establish itself at the Palau Islands, but has not extended its range farther into other islands of Micronesia. Perhaps, the bird is now in an early stage in its island occupation. The Purple Swamphen is probably not abundant in the Palaus. It is a large and conspicuous bird, and its restriction to swamps and areas around lakes may allow native hunters to obtain it rather easily, particularly by snares or by organized drives. Coultas (field notes) obtained specimens in taro swamps; he saw only 4 individuals and remarks that the birds utter harsh cries at night. The NAMRU2 party flushed an adult from lake side vegetation at Angaur on September 21, 1945. This bird was not taken, but a downy young was obtained in the area the same day. =Fulica atra atra= Linnaeus Common Coot _Fulica atra_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 152. (Type locality, Europe, restricted to Sweden.) _Fulica atra_ Hartert, Novit. Zool., 5, 1898, pp. 64, 69 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 32 (Guam); Safford, Osprey, 1902, p. 70 (Marianas); _idem_, The Plant World, 7, 1904, p. 268 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 43 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam). _Fulica atra atra_ Hartert, Vögel pal. Fauna, 15, 1921, p. 1852 (Guam); Hand-list Japanese Birds, rev., 1932, p. 197 (Tinian, Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 222, (Tinian, Guam); Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Geographic range._--Breeds in Europe, northern Africa, and Asia. Winters south to Africa, Malaysia, southern Asia. In Micronesia: Mariana Islands--Tinian, Guam. _Remarks._--The Common Coot is a straggler to Micronesia in winter. It has been recorded from Guam and Tinian. An unsexed specimen in the collections of the American Museum of Natural History was taken at Guam in the fall of 1896 by one of Owston's collectors. =Squatarola squatarola= (Linnaeus) Black-bellied Plover _Tringa Squatarola_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 149. (Type locality, Europe, restricted to Sweden.) _Charadrius squatarola_ Hartert, Novit. Zool., 5, 1898, p. 66 (Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 35 (Micronesia); Safford, Osprey, 1902, p. 67 (Marianas). _Squatarola squatarola_ Hartert, Novit. Zool., 7, 1900, p. 9 (Ruk); Safford, The Plant World, 7, 1904, p. 266 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 22 (Guam); Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 72 (Ruk); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 15 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 216 (Saipan, Truk); Mayr, Birds Southwest Pacific, 1945, p. 36 (Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 50 (Guam). _Squatarola helvetica_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 61 (Marianas, Ruk). _Squatarola squatarola hypomelaena_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 43 (Ruk, Saipan); Hand-list Japanese Birds, rev., 1932, p. 193 (Saipan, Truk). _Geographic range._--Breeds in arctic regions of Holarctica. Winters in Southern Hemisphere. In Micronesia: Mariana Islands--Guam, Saipan; Caroline Islands--Truk; Marshall Islands--Eniwetok. _Specimens examined._--One female from Mariana Islands. USNM--Guam (Aug. 27). _Remarks._--The Black-bellied Plover is an uncommon visitor to Micronesia. One bird was obtained by Markley of the NAMRU2 party at Guam on August 27, 1945; Flavin recorded five of these birds from November, 1944, to January, 1946. Bryan and Greenway (1944:109) record this species as an occasional visitor to the Hawaiian Islands. Gleise and Genelly (1945:221) observed the Black-bellied Plover at Eniwetok in 1945. =Pluvialis dominica fulva= (Gmelin) Pacific Golden Plover _Charadrius fulvus_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 687. (Type locality, Tahiti.) _Charadrius pluvialis_ Kittlitz, Obser. Zool., in Lutké., Voy. "Le Séniavine," 3, 1836, pp. 287, 299, 304 (Ualan, Longounor, Guahan); _idem_, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, pp. 32, 55 (Ualan). _Charadrius virginianus_ Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen, Carolinen). _Charadrius longipes?_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 47 (Ladrone or Marian Islands, Oualan). _Pluvialis fulvus_ Schlegel, Mus. Pays-Bas, 6, no. 29, 1865, p. 52 (Micronesie). _Charadrius fulvus_ Finsch and Hartlaub, Fauna Central-polynesiens, 1867, p. 196 (Marianen, Ualan); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 117, 118 (Pelews); Finsch and Hartlaub, Journ. f. Ornith., 1870, p. 139 (Pelew); Finsch, Journ. f. Ornith., 1872, p. 52 (Pelew, Carolinen); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 104 (Pelew, Mackenzie, Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 31 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 38 (Ponapé); _idem_., Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); _idem_, Proc. Zool. Soc. London, 1880, p. 576 (Ruk); _idem_, Journ. f. Ornith., 1880, pp. 293, 305 (Ponapé, Kuschai); _idem_, Ibis, 1880, pp. 220, 331, 332 (Taluit); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 353 (Ponapé, Ruk); Finsch, Ibis, 1881, pp. 105, 106, 109, 113, 115 (Kushai, Ponapé); Salvadori, Ornith. Papuasia, 3, 1882, p. 395 (Carolines, Pelews, Marianas); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 55 (Jaluit, Milli, Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 63 (Marshall Islands, Ualan, Luganor, Ponapé, Ruk, Uap, Pelew, Marianne); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 46 (Guam, Hogoleu, Marshalls, Palaos); Hartert, Novit. Zool. 5, 1898, p. 66 (Guam); _idem_, Novit. Zool., 7, 1900, p. 9 (Ruk); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 36 (Micronesia); Schnee, Ornith. Monatsber., 1901, p. 132 (Marshalls); Safford, Osprey, 1902, p. 68 (Marianas); _idem_, The Plant World, 7, 1904, p. 266 (Guam); Schnee, Zool. Jahrbücher, 20, 1904, p. 389 (Marschall-Inseln); Takatsukasa and Kuroda, Tori, 1, 1915, p. 51 (Ponapé). _Charadrius dominicus fulvus_ Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 22 (Guam). _Charadrius dominicus_ Sharpe, Cat. Birds British Mus., 24, 1896, p. 195 (Micronesia). _Pluvialis dominicus fulvus_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 89 (Kuschai, Pelew, Ruk, Marianas, Mackenzie, Ponapé); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 177 (Uala, Arhno, Rongelab); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 44 (Guam, Angaur, Ualan, Luganor, Ponapé, Ruk, Yap, Arhno); Hand-list Japanese Birds, 3d ed., 1942, p. 216 (Saipan, Tinian, Guam, Babelthuap, Koror, Peliliu, Angaur, Yap, Ulithi, Truk, Lukunor, Ponapé, Kusaie, Mille, Arhno, Majuro, Likieb). _Pluvialis apricarius fulvus_ Hand-list Japanese Birds, rev., 1932, p. 193 (Saipan, Tinian, Babelthuap, Koror, Pelilieu, Angaur, Yap, Uluthi, Truk, Lukunor, Ponapé, Kusaie, Mille, Arhno, Majuro, Likieb). _Pluvialis dominica fulva_ Peters, Check-list Birds World, 2, 1934, p. 244 (Oceania); Bryan, Guam, Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Stickney, Amer. Mus. Novit., no. 1248, 1943, p. 3 (Saipan, Guam, Palau, Ponapé, Kusaie, Ruk, Tarawa); Mayr, Birds Southwest Pacific, 1945, p. 39 (Oceania); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 93 (Tinian); Strophlet, Auk, 1946, p. 536 (Guam); Borror, Auk, 1947, p. 417 (Agrihan); Stott, Auk, 1947, p. 525 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 50 (Guam, Rota, Peleliu, Garakayo, Ulithi, Truk). _Pluvialis dominica_ Wharton and Hardcastle, Journ. Parasitology, 32, 1946, pp. 306, 310, 313, 316, 318 (Ulithi, Guam); Wharton, Ecol. Monogr., 16, 1946, pp. 174, 175 (Guam). _Geographic range._--Breeds from Siberia to western Alaska. Winters from India east to Oceania; stragglers occur west to Africa and east to Pacific coast of North America. In Micronesia: Mariana Islands--Guam, Rota, Tinian, Saipan, Agrihan, Asuncion; Palau Islands--Angaur, Peleliu, Ngabad, Garakayo, Koror, Babelthaup; Caroline Islands--Yap, Ulithi, Truk, Lukunor, Ponapé, Kusaie; Marshall Islands--Mille, Arhno, Rongelab, Majuro, Likieb, Bikini. _Specimens examined._--Total number, 69 (39 males, 26 females, 4 unsexed), as follows: Mariana Islands, USNM--Guam, 17 (July 8, 19, 24, Aug. 31, Sept. 4, 17, 19, 26, Oct. 5, 8, 23, 24)--Rota, 5 (Oct. 20, 25); AMNH--Guam, 6 (Mar. 7, 8, 27, Aug. 15)--Saipan, 1 (Sept. 8)--Asuncion, 2 (Feb. 16); Palau Islands, USNM--Peleliu, 9 (Sept. 6-20)--Garakayo, 1 (Sept. 20); AMNH--exact locality not given, 7 (Oct. 13, Nov. 13, 15); Caroline Islands, USNM--Ulithi, 4 (Aug. 16, 21); AMNH--Kusaie, 9 (Mar. 10-30)--Ponapé, 2 (Dec. 15)--Truk, 3 (Feb. 6); Marshall Islands, USNM--Bikini, 3 (Mar. 4, 7, May 3). _Parasites._--Wharton (1946:174, 175) records the following chiggers (Acarina) from _Pluvialis_ taken by the NAMRU2 party at Guam: _Acariscus pluvius_, _A. anous_, _Neoschöngastia carveri_, and _N. namrui_; and at Ulithi: _N. pauensis_ and _N. ewingi_. _Weights._--Birds taken at Guam and Rota weighed as follows: seven males, 107-125 (117); four females, 109-120 (114). _Remarks._--The Pacific Golden Plover is one of the most abundant migratory shore birds to visit Micronesia. So characteristic of Micronesia is this species that almost all ornithologists who have made observations in the area have recorded it. Finsch observed the plover in the Carolines and Marshalls. Coultas made notes on, and collected specimens of, it in the Marianas, Carolines, and Palaus. The Hand-list of Japanese Birds (Hachisuka _et al._, 1942:216) lists _Pluvialis_ from 17 islands in Micronesia. Stickney (1943:3, 4) discusses the migrations of the Pacific Golden Plover through Oceania, using as a basis for her remarks the data from the extensive collections made by the Whitney South Sea Expedition. She states that the northward migration begins in March from the southern islands (New Zealand and southern Australia). At Guam in 1945, the writer observed flocks of plover beginning on February 11. Birds were seen in small groups in March and April. In the latter month most of the birds seen were in nuptial plumage. For the year 1945, the latest spring record at Guam was April 28. In the same year, Gleise (1945:220) observed his last spring record at Tinian "between April 26 and 27." In 1946, Morrison obtained plover in nuptial plumage at Bikini on May 3. In an effort to obtain dates when shore birds appeared at Guam, field parties of NAMRU2 made observations at several beaches in late spring, summer, and early fall, as is shown in table 8. Pacific Golden Plovers in post-nuptial molt were first observed and collected on July 8. Following this date, small flocks and later large flocks were more numerous; by September 29, plover were abundant. Similar findings were obtained at Ulithi (see table 9) and in the Palau Islands (see table 10) in August and September. The birds collected by the NAMRU2 party at Guam, Ulithi, Peleliu, and Garakayo in July, August, September, and early October were in postnuptial molt. Birds taken at Rota on October 20 and 26 were in winter plumage. Downs (1946:93) observed plover in small flocks at Tinian in 1945, beginning after September 5. Borror (1947:417) saw two birds at Agrihan on August 10, 1945. The flocks of plover seen by the NAMRU2 party varied in size from three to 30 birds, the average being less than ten. Coultas (field notes) noted "large flocks" at the Palaus from October to December, 1931. Although plover was often found on the same beach as other birds, the NAMRU2 observers rarely saw plover together with other shore birds. However, on air strips _Pluvialis_ occasionally occurred with small numbers of _Arenaria_, _Heteroscelus_ spp., and _Numenius phaeopus_. _Pluvialis_ and _N. phaeopus_ were the only shore birds found to use open grassy flats and other inland areas at Guam and Peleliu in 1945. Stickney (1943) records _Pluvialis_ in late spring and summer from Polynesia, indicating these to be birds remaining in the winter range during the breeding season. The NAMRU2 party observed no Pacific Golden Plovers at Guam which might be regarded as non-migrants, but other species of shore birds were found which might be considered as such. The lingering of individuals in the winter range is not unusual among migratory birds, and as Stickney points out, most of the non-migrants retain their winter dress or assume an incomplete breeding plumage. =Charadrius hiaticula semipalmatus= Bonaparte Semipalmated Plover _Charadrius semipalmatus_ Bonaparte, Journ. Acad. Nat. Sci. Phila., 5, 1825, p. 98. New name for _Tringa hiaticula_ Ord. not _Charadrius hiaticula_ Linnaeus, in Wilson's Amer. Ornith., Ord. repr., 7, 1824, p. 65. (Type locality, Coast of New Jersey.) _Charadrius hiaticula_ Finsch, Ibis, 1880, p. 331 (Taluit); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 64 (Taluit or Bonham); Schnee, Zool. Jahrbücher, 20, 1904, p. 389 (Marschall-Inseln); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 45 (Taluit). _Geographic range._--Breeds from Arctic America south to coastal Canada. Winters from southern United States to South America. In Micronesia: Marshall Islands--Jaluit. _Remarks._--Finsch (1880d:331) reported this bird (sight record) at Jaluit in the Marshall Islands. Other than this observation, there is no history of the species in Micronesia. =Charadrius dubius curonicus= Gmelin Ring-necked Plover _Charadrius curonicus_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 692. (Type locality, Kurland.) _Charadrius dubius curonicus_ Hand-list Japanese Birds, rev., 1932, p. 194 (Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 217 (Yap); Mayr, Birds Southwest Pacific, 1945, p. 37 (Micronesia). _Geographic range._--Breeds in northern Europe and Asia. Winters from Africa east to Malaysia and Melanesia. In Micronesia: Caroline Islands--Yap. _Remarks._--The Ring-necked Plover has been recorded at Yap by the Japanese collectors. Mayr (1945a:37) remarks that the bird is an occasional migrant through Micronesia. Gleise and Genelly (1945:221) observed four "Papuan" Ring-necked Plovers at Eniwetok in 1945. Apparently no specimen was obtained. =Charadrius alexandrinus nihonensis= Deignan Kentish Plover _Charadrius alexandrinus nihonensis_ Deignan, Journ. Washington Acad. Sci., vol. 31, 1941, p. 106. (Type locality, Aomori, Hondo.) _Charadrius cantianus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 117, 118 (Pelew); _idem_, Proc. Zool. Soc. London, p. 89 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 31 (Palau). _Aegialitis cantianus_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 64 (Pelew); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Pelew). _Aegialitis alexandrinus dealbatus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 45 (Pelew). _Charadrius alexandrinus dealbatus_ Hand-list Japanese Birds, rev., 1932, p. 194 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 217 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 37 (Palau). _Geographic range._--Breeds in Japan and possibly on adjacent parts of the Asiatic mainland. Winters south to Malaya. In Micronesia: Palau Islands--exact locality unknown. _Remarks._--The Kentish Plover is known from a single record obtained by Semper in the Palau Islands. It is tentatively assigned to _C. a. nihonensis_, which breeds directly north of the Palau Islands on Japan. _C. a. dealbatus_ (Swinhoe) breeds more to the west on the Asiatic mainland and adjacent islands south of Japan. Additional specimens are needed before the subspecific status of migrants to Micronesia can be accurately determined. =Charadrius mongolus stegmanni= Stresemann Mongolian Dotterel _Charadrius mongolus stegmanni_ Stresemann, Ornith. Monatsb., 48, 1940, p. 55. New name for _Charadrius mongolus littoralis_ Stegmann, 1937, preoccupied. (Type locality, Behring Island.) _Charadrius sanguineus_ Lesson, Man. d'Ornith., 2, 1828, p. 330 (No type locality = Mariana Islands, _ex_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 48); _idem_, Traité d'Ornith., 1831, p. 544 (no locality = Mariana Islands); Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen). _Charadrius mongolicus_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 48 (Guam, Jaluit, Palaos, Carolines); Hartert, Novit. Zool., 5, 1898, p. 66 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 36 (Guam); Safford, Osprey, 1902, p. 68 (Guam). _Aegialitis mongolus_ Hartert, Novit. Zool., 7, 1900, p. 9 (Ruk). _Aegialis mongola_ Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam). _Aegialites mongola_ Cox, Island of Guam, 1917, p. 22 (Guam). _Ochthodromus mongolicus_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Marianas, Ruk). _Charadrius mongolus_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 132 (Ruk); Mayr, Birds Southwest Pacific, 1945, p. 38 (Micronesia). _Charadrius mongolus mongolus_ Hartert, Vögel pal. Fauna, 11-12, 1920, p. 1543 (Marianen, Karolinen); Hand-list Japanese Birds, rev., 1932, p. 194 (Guam, Truk, Iuripik, Kusaie, Jaluit, Majuro); Peters, Check-list Birds World, 2, 1934, p. 253 (Carolines, Marianas); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 50 (Guam, Peleliu, Ulithi). _Cirrepidesmus mongolus mongolus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 44 (Guam, Ruk). _Charadrius mongolus stegmanni_ Hand-list Japanese Birds, 3d ed., 1942, p. 217 (Guam, Peliliu, Truk, Iuripik, Kusaie, Jaluit, Majuro). _Geographic range._--Breeds in northeastern Siberia and Bering Sea area. Winters south to eastern Malaysia, Melanesia, and Australia. In Micronesia: Mariana Islands--Guam; Palau Islands--Angaur, Peleliu; Caroline Islands--Ulithi, Truk, Iuripik, Kusaie; Marshall Islands--Jaluit, Majuro. _Specimens examined._--Total number, 10 (4 males, 5 females, 1 unsexed), as follows: Mariana Islands, USNM--Guam, 2 (June 7, Sept. 1); AMNH--Guam, 3 (Aug. 15, 18, Nov. 30); Palau Islands, USNM--Peleliu, 3 (Sept. 7-12); Caroline Islands, USNM--Ulithi, 1 (Aug. 22); AMNH--Truk, 1 (Feb. 8). _Remarks._--According to Oustalet (1896:48), Lesson used two specimens of this species, which were collected in the Marianas by the expedition in the "Uranie," as types for his _Charadrius sanguineus_. The Mongolian Dotterel is a regular visitor to western Micronesia. It is recorded also from the Marshall Islands, which it probably reaches from the westward by way of the Carolines, since the species has not been recorded in the Hawaiian Islands. A bird taken by the writer at Guam on June 7, 1945, was in winter plumage and probably nonmigratory. The species was recorded also at Guam in September. At Peleliu in September, 1945, the Mongolian Dotterel was seen frequently on tidal flats by the NAMRU2 party. On September 8 there was a flock of approximately fifty birds, in company with _Charadrius leschenaultii_, at Akarakoro Point. In August at Ulithi, birds were on the beaches in company with _Crocethia alba_. At Angaur on September 21, 1945, the species was with other shore birds in small groups at fresh water ponds. I am tentatively referring all specimens examined to _C. m. stegmanni_ although at this writing (1948) I am inclined to the opinion that a critical reexamination of the referred specimens might reveal one or a few individuals of the subspecies _C. m. mongolus_ Pallas. =Charadrius leschenaultii= Lesson Large Sand Dotterel _Charadrius Leschenaultii_ Lesson, Dict. Sci. Nat., ed. Levrault, 42, 1826, p. 36. (Type locality, Pondichery, India.) _Charadrius griseus_ Lesson, Traité d'Ornith., 1831, p. 544 (Oulan). _Charadrius geoffroyi_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 117, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, p. 89 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 31 (Palau). _Aegialitis geoffroyi_ Salvadori, Ornith. Papuasia, 3, 1882, p. 299 (Ualan, Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 64 (Pelew, Ualan). _Ochthodromus geoffroyi_ Sharpe, Cat. Birds British Mus., 24, 1896, p. 217 (Pelew, Ualan); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Pelew). _Pagoa leschenaultii_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 44 (Pelew, Kusaie, Yap). _Charadrius leschenaultii leschenaultii_ Hand-list Japanese Birds, rev., 1932, p. 193 (Yap, Kusaie, Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 216 (Yap, Kusaie, Palau). _Charadrius leschenaultii_ Mayr, Birds Southwest Pacific, 1945, p. 38 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 51 (Peleliu). _Geographic range._--Breeds in Asia south to Persia. Winters from Malaysia east to Australia and Melanesia. In Micronesia: Palau Islands--Peleliu; Caroline Islands--Yap, Kusaie. _Specimens examined._--Total number, 9 (2 males and 7 females), as follows: Palau Islands, USNM--Peleliu, 7 (Sept. 6-12); AMNH--exact locality not given, 2 (Nov. 21, 25). _Remarks._--The Large Sand Dotterel is a regular visitor to the Palau Islands. It has been recorded also at Yap and Kusaie in the Carolines, where it may be considered as an uncommon visitor. At Peleliu, the species was seen on several occasions in September, 1945, by the NAMRU2 party. The birds were found on tidal flats in company with _Charadrius mongolus stegmanni_ in flocks of 10 to 30 individuals. =Numenius phaeopus variegatus= (Scopoli) Whimbrel _Tantalus variegatus_ Scopoli, Del. Flor. et Faun. Insubr., fasc. 2, 1786, p. 92. (Type locality, Luzon, _ex._ Sonnerat.) _Scolopax phaeopus_ Lesson, Traité d'Ornith., 1831, p. 566 (Marianas). _Numenius phaeopus_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 287, 304 (Ualan, Guahan), Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen); Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 129 (Ualan); Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Pelew, Matelotas); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 106 (Uap, Pelews); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 35 (Palau); _idem_, Journ. f Ornith., 1880, pp. 294, 307 (Ponapé, Kuschai); _idem_, Proc. Zool. Soc. London, 1880, p. 576 (Ruk); _idem_, Ibis, 1881, pp. 107, 109, 115 (Kushai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 299, 353 (Ponapé, Mortlock, Ruk); Wharton and Hardcastle, Journ. Parasitology, 32, 1946, pp. 308, 316, 318, 320 (Ulithi, Guam); Wharton, Ecol. Monogr., 16, 1946, pp. 174, 175 (Guam). _Numenius tenuirostris_ Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 55 (Marianas, Ualan). _Numenius uropygialis_ Gray, Hand-list Birds, 3, 1871, p. 43 (Pelew). _Numenius variegatus_ Salvadori, Ornith. Papuasia, 3, 1882, p. 332 (Pelew, Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 66 (Marianne, Pelew, Matalotas, Luganor, Ruk, Ponapé, Ualan); Sharpe, Cat. Birds British Mus., 24, 1896, p. 361 (Micronesia); Safford, The Plant World, 7, 1904, p. 266 (Guam). _Numenius phaeopus variegatus_ Oustalet, Nouv. Arch. Mus. Hist. Nat Paris, (3), 8, 1896, p. 39 (Mariannes, Palaos, Carolines, Jaluit); Hartert, Novit. Zool., 5, 1898, p. 65 (Guam); _idem_, Novit. Zool., 7, 1900, p. 8 (Ruk); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 34 (Guam); Safford, Osprey, 1902, p. 67 (Marianas); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Marianas, Carolines, Pelews); Cox, Island of Guam, 1917, p. 21 (Guam); Hartert, Vögel pal. Fauna, 13-14, 1921, p. 1649 (Guam); Hand-list Japanese Birds, rev., 1932, p. 192 (Marianas, Carolines, Palaus, Marshalls); Peters, Check-list Birds World, 2, 1934, p. 261 (Caroline, Marianne, Pelew); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 215 (Guam, Koror, Babelthuap, Ngulu, Yap, Uluthi, Iuripik, Truk, Lukunor, Ponapé, Kusaie, Jaluit, Wotze); Mayr, Birds Southwest Pacific, 1945, p. 39 (Micronesia); Strophlet, Auk, 1946, p. 537 (Guam); Stott, Auk, 1947, p. 525 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 51 (Guam, Angaur, Peleliu, Ulithi). _Phaeopus phaeopus variegatus_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 178 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 45 (Palaus, Carolines, Marians). _Geographic range._--Breeds in northeastern Asia. Winters from Malaysia east to Oceania. In Micronesia: Mariana Islands--Guam; Palau Islands--Angaur, Peleliu, Koror, Babelthuap; Caroline Islands--Ngulu, Yap, Ulithi, Truk, Lukunor, Iuripik, Ponapé, Kusaie; Marshall Islands--Jaluit, Wotze. _Specimens examined._--Total number, 26 (9 males, 17 females), as follows: Mariana Islands, USNM--Guam, 16 (June 4, 6, July 24, 26, 27, Sept. 1, 19, 25, Oct. 8); Palau Islands, USNM--Peleliu, 5 (Sept. 8, 12, 14)--Angaur, 4 (Sept. 21); Caroline Islands, USNM--Ulithi, 1 (Aug. 17). _Weights._--At Guam, the NAMRU2 party obtained the weights of two males, 373 and 435, and of six females, 295-426 (384). _Parasites._--Wharton (1946:174, 175) lists the following species of chiggers (Acarina) taken from the Whimbrel at Guam: _Acariscus pluvius_, _A. anous_, _Neoschöngastia strongi_, and _N. carveri_; and at Ulithi: _N. namrui_ and _N. atollensis_. _Remarks._--The Whimbrel is an abundant visitor to western Micronesia. It was first taken by Quoy and Gaimard, who found it in the Marianas. It is recorded in the Marshall Islands (Jaluit and Wotze), but apparently reaches these islands from the west, since the species is unknown in the Hawaiian Islands. As shown in table 8, the NAMRU2 party observed the Whimbrel at Guam on spring migration in March, 1945, the last record being on March 21. In June and July, single birds or small groups were occasionally seen on the tidal flats. Some of these birds may have been nonmigratory. Beginning on July 24, more birds were recorded as they began to migrate south after their nesting season. Whimbrels were numerous from August until the conclusion of the observations in October. Birds were abundant at the Palaus in September; only a few were noted at Ulithi in late August. The Whitney South Sea Expedition of the American Museum of Natural History made collections of this species at several islands in Micronesia. At Ponapé, Coultas (field notes) writes that in November and December, 1930, a few birds were seen on the reefs and at the edges of mangrove swamps. At Peleliu in October to December, 1931, he found Whimbrels concentrated on a small islet between Koror and Babelthuap. At both Ponapé and Palau Coultas received reports that the birds remain at the islands throughout the year. =Numenius tahitiensis= (Gmelin) Bristle-thighed Curlew _Scolopax tahitiensis_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 656. (Type locality, Tahiti, Society Islands, based on the Otaheiti Curlew of Latham, Gen. Syn., 3, pt. 1, 1785, p. 122, no. 4.) _Numenius femoralis_ Finsch, Ibis, 1880, pp. 220, 331, 332 (Jaluit, Arno). _Numenius tahitiensis_ Seebohm, Geogr. Dist. Charadriidae, 1887, p. 332 (Marshalls); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 66 (Marianne?, Marshalls); Sharpe, Cat. Birds British Mus., 24, 1896, p. 367 (Marianas, Marshalls); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Marianas, Pelews); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 49 (Marianas, Marshalls); Bent, Bull. U. S. Nat. Mus., 146, 1929, p. 143 (Jaluit); Hand-list Japanese Birds, rev., 1932, p. 192 (Saipan, Marshalls); Peters, Check-list Birds World, 2, 1934, p. 261 (Marshalls); Yamashina, Tori, 10, 1940, p. 677 (Jarchi); Hand-list Japanese Birds, 3d ed., 1942, p. 215 (Saipan, Jaluit, Arhno, Maloelab, Wotze, Ailuk, Ringelab, Larchi); Stickney, Amer. Mus. Novit., no. 1248, 1943, p. 4 (Ponapé, Marshalls); Mayr, Birds Southwest Pacific, 1945, p. 39 (Marshalls, straggler to Carolines and Marianas). _Phaeopus tahitiensis_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 179 (Rongelab); Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 407 (Marianas, Marshalls). _Geographic range._--Breeds in western Alaska. Winters in eastern and central Polynesia. In Micronesia: Mariana Islands--Saipan; Caroline Islands--Ponapé; Marshall Islands--Jaluit, Arhno, Moloelab, Wotze, Ailuk, Rongelab, Larchi, Bikini. _Specimens examined._--Total number, 6 (3 males, 3 females), as follows: Caroline Islands, AMNH--Ponapé, 2 (Dec. 15); Marshall Islands, USNM--Bikini, 4 (Mar. 10, 14, April 2, 30). _Remarks._--The Bristle-thighed Curlew is a regular migrant through the Marshall Islands of eastern Micronesia. It is recorded as a straggler to the Caroline and Mariana islands. Stickney (1943:4, fig. 1) shows a map and discusses the breeding and wintering ranges of this curlew. As can be observed from her map, the principal wintering areas are east and south of Micronesia. She records the species from the Bonin Islands, which is the westernmost record. It is difficult to offer plausible reasons for the present migratory habits of the Bristle-thighed Curlew. It is related to both the Asiatic form, _N. phaeopus_, and to the American species, _N. hudsonicus_, but its origin is not understood. The characteristics of its route of migration resemble that of some continental migrants and might have come about by a slow adjustment of the species to its environment, probably through an expansion of range from the west. =Numenius madagascariensis= (Linnaeus) Long-billed Curlew _Scolopax madagascariensis_ Linnaeus, Syst. Nat., ed. 12, 1, 1766, p. 242. (Type locality, Madagascar, error = Manila, Philippine Islands, _fide_ Stresemann.) _Numenius cyanopus_ Hartert, Novit. Zool., 5, 1898, p. 65 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 35 (Micronesia); Safford, Osprey, 1902, p. 67 (Marianas); _idem_, The Plant World, 7, 1904, p. 266 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Hartert, Vögel pal. Fauna, 13-14, 1921, p. 1645 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 45 (Guam); Hand-list Japanese Birds, rev., 1932, p. 192 (Guam). _Numenius madagascariensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 214 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 40 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 51 (Guam, Ngesebus). _Geographic range._--Breeds in eastern Siberia. Winters from Malaysia east to Australia and Melanesia. In Micronesia: Mariana Islands--Guam; Palau Islands--Peleliu, Ngesebus. _Remarks._--The Long-billed Curlew is a regular visitor to western Micronesia, especially to the Palau Islands. It is apparently a less common migrant in the Marianas, although it has been recorded from Guam. At Guam, the NAMRU2 party observed a single bird on June 6 and two on October 3 at tidal beaches. At Peleliu these large curlews were seen on several occasions between September 9 and 16, 1945. They were found usually as singles feeding on tidal flats in company with other shorebirds. =Limosa lapponica baueri= Naumann Pacific Godwit _Limosa Baueri_ Naumann, Naturg. Vög. Deutschl., 8, 1836, p. 429. (Type locality, New Holland = Victoria, _apud_ Mathews; Novit. Zool., 18, 1912, p. 220.) _Limosa uropygialis_ Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 299 (Mortlock). _Limosa novae-sealandiae_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 66 (Luganor). _Limosa lapponica baueri_ Hartert, Novit. Zool., 5, 1898, p. 65 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 34 (Guam); Safford, Osprey, 1902, p. 67 (Marianas); _idem_, The Plant World, 7, 1904, p. 266 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Prowazek, Die deutschen Marianen, 1913, p. 101 (Marianen); Cox, Island of Guam, 1917, p. 21 (Guam); Hartert, Vögel pal. Fauna, 13-14, 1921, p. 1641, (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 46 (Carolines, Marianas); Hand-list Japanese Birds, rev., 1932, p. 191 (Marianas, Carolines); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Stickney, Amer. Mus. Novit., no. 1248, 1943, p. 5 (Guam, Palau); Mayr, Birds Southwest Pacific, 1945, p. 41 (Oceania); Strophlet, Auk, 1946, p. 537 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 52 (Guam, Peleliu). _Limosa lapponica novazealandiae_ Hartert, Novit. Zool., 7, 1900, p. 8 (Ruk); Hand-list Japanese Birds, 3d ed., 1942, p. 214 (Guam, Truk). _Limosa rufa uropygialis_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Marianas, Ruk). _Geographic range._--Breeds in northeastern Asia and northwestern North America. Winters from Malaysia east to Oceania. In Micronesia: Mariana Islands--Guam; Palau Islands--Peleliu; Caroline Islands--Truk. _Specimens examined._--Total number, 5 (2 males, 3 females), as follows: Mariana Islands, AMNH--Guam, 2 (Sept. 26); Palau Islands, USNM--Peleliu, 1 (Sept. 7); AMNH--exact locality not given, 2 (Nov. 21, 23). _Remarks._--The principal wintering grounds of the Pacific Godwit are probably in Australia and New Zealand according to Stickney (1943:5). The bird reaches these areas from Arctic breeding grounds by migrating to a great extent along the edge of the Asiatic Continent. It may also be considered as a regular migrant in western Micronesia, and probably reaches eastern Micronesia as an uncommon visitor, since it is occasionally recorded in the Hawaiian Islands. At Guam in 1945, the NAMRU2 party found the Pacific Godwit at tidal beaches on April 26 and October 15. Strophlet (1946:537) recorded one bird from Guam on October 20, 1945. At Peleliu, the NAMRU2 party found birds at beaches on September 7 and 16. Coultas (field notes) reported that "a few" were seen at Peleliu from October to December, 1931. McElroy did not find any of these birds at Truk in December, 1945. =Tringa nebularia= (Gunnerus) Greenshank _Scolopax nebularis_ Gunnerus, in Leem, Beskr. Finm. Lapper, 1767, p. 251. (Type locality, District of Trondhjem, Norway.) _Glottis nebularius_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 47 (Yap); Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 225 (Truk); Hand-list Japanese Birds, rev., 1932, p. 191 (Yap, Truk). _Tringa nebularis_ Hand-list Japanese Birds, 3d ed., 1942, p. 214 (Yap, Truk); Mayr, Birds Southwest Pacific, 1945, p. 41 (Yap, Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 52 (Peleliu). _Geographic range._--Breeds in northern Eurasia. Winters in Mediterranean area, Africa, southern Asia, Malaysia, Australia and Melanesia. In Micronesia: Palau Islands--Peleliu; Caroline Islands--Yap, Truk. _Specimens examined._--Total number, 4 (1 male, 3 females) from Palau Islands, USNM--Peleliu (Aug. 28, Sept. 14, 15). _Remarks._--The Greenshank has been recorded at the Palau Islands and at Yap and Truk in the Caroline Islands. It is apparently a regular visitor to western Micronesia. It probably reaches the western Carolines as an occasional visitor from the region of the Palaus to the westward, rather than from the northward, since the bird has not been observed in the Marianas. The NAMRU2 party observed two small flocks of these birds at Peleliu in August and September, 1945. One group of six birds was found wading in the shallow water of a mangrove swamp on August 28. Another group of three birds was seen on a tidal beach on September 14 and 15, where they were observed feeding apart from other species of shore birds. =Tringa melanoleuca= (Gmelin) Greater Yellow-legs _Scolopax melanoleuca_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 659. (Type locality, Sandy shores of Labrador = Chateau Bay, Labrador.) _Tringa melanoleuca_ Kuroda, Dobutsu. Zasshi, 46, 1934, p. 313 (Jaluit); Hand-list Japanese Birds, 3d ed., 1942, p. 214 (Jaluit). _Geographic range._--Breeds in Alaska and Canada. Winters from California east to the Gulf States and the West Indies and south to South America. In Micronesia: Marshall Islands--Jaluit. _Remarks._--Kuroda records one specimen of the Greater Yellow-legs from Jaluit Atoll in the Marshall Islands. It is a straggler to Oceania and has not been recorded in the Hawaiian Islands. =Tringa glareola= Linnaeus Wood Sandpiper _Tringa glareola_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 149. (Europe, restricted type locality, Sweden.) _Totanus glareola_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 43 (Guam); Hartert, Novit. Zool., 5, 1898, pp. 65, 69 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 34 (Guam); Safford, Osprey, 1902, p. 70 (Guam); _idem_, The Plant World, 7, 1904, p. 268 (Guam). _Rhyacophilus glareola_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 48 (Guam, Angaur). _Tringa glareola_ Hand-list Japanese Birds, rev., 1932, p. 191 (Guam, Angaur, Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 213 (Guam, Anguar, Koror); Mayr, Birds Southwest Pacific, 1945, p. 41 (Guam, Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 52 (Anguar). _Tringa glariola_ Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam). _Geographic range._--Breeds in northern Eurasia from Norway and Germany east to Siberia, Sakhalin, and Kamchatka. Winters from Africa east to southern Asia, Malaysia, and Australia. In Micronesia: Mariana Islands--Guam; Palau Islands--Anguar, Koror. _Specimens examined._--Total number, 2 (1 male, 1 female), as follows: Palau Islands, USNM--Angaur, 1 (Sept. 21); AMNH--exact locality not given, 1 (October 26). _Remarks._--Marche, in 1877, first recorded the Wood Sandpiper in Micronesia (at Guam). In the Marianas it is apparently an uncommon migrant but it is considered to be a regular visitor in the Palau Islands. At the Palaus in September, 1945, the writer found the bird at a fresh water pond on Angaur. It was not observed on the tidal beaches at Peleliu. =Actitis hypoleucos= Linnaeus Common Sandpiper _Tringa Hypoleucos_ Linnaeus, Syst. Nat., ed. 10, 1, 1858, p. 149 (Europe, restricted type locality, Sweden.) _Totanus hypoleucos_ Lesson, Traité d'Ornith., 1831, p. 552 (Marianas). _Totanus (Tringoides) hypoleucus_ Gray, Birds Trop. Is. Pacific Ocean, 1859, p. 51 (Marianas). _Actitis hypoleuca_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 8 (Pelew). _Actitis hypoleucus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 106 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 36 (Pelew); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 299, 353 (Ruk, Mortlock); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 64 (Luganor, Marianne, Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris (3), 8, 1896, p. 43 (Guam, Palaos, Luganor). _Tringoides hypoleucos_ Gray, Hand-list Birds, 3, 1871, p. 46 (Pelew, Ladrone); Salvadori, Ornith. Papuasia, 3, 1882, p. 318 (Pelew). _Tringoides hypoleucus_ Sharpe, Cat. Birds British Mus., 24, 1896, p. 456 (Micronesia); Takatsukasa and Kuroda, Tori, 1, 1915, pp. 51, 62 (Pelews, Marianas). _Totanus hypoleucus_ Hartert, Novit. Zool., 5, 1898, p. 65 (Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 34 (Guam); Safford, Osprey, 1902, p. 70 (Mariannes); _idem_, The Plant World, 7, 1904, p. 268 (Guam). _Actitis hypoleucos_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 372 (Micronesia); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 47 (Marianas, Carolines, Pelews); Peters, Check-list Birds World, 2, 1934, p. 269 (Micronesia); Bryan, Guam Rec., vol. 13, no. 1, 1936, p. 24 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 42 (Micronesia); Strophlet, Auk, 1946, p. 537 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 52 (Guam, Peleliu, Ulithi). _Tringa hypoleucos_ Hand-list Japanese Birds, rev., 1932, p. 191 (Marianas, Carolines, Pelews); Hand-list Japanese Birds, 3d ed. 1942, p. 214 (Saipan, Babelthuap, Koror, Peleliu, Angaur, Ulithi, Truk). _Geographic range._--Breeds in Europe and Asia. Winters from Africa east to Polynesia. In Micronesia: Mariana Islands--Guam, Saipan; Palau Islands--Angaur, Peleliu, Koror, Babelthuap; Caroline Islands--Ulithi, Truk, Lukunor. _Specimens examined._--Total number, 12 (4 males, 7 females, 1 unsexed), as follows: Mariana Islands, USNM--Guam, 4 (July 16, Sept. 20); AMNH--Saipan, 1 (July 27); Palau Islands, USNM--Peleliu, 3 (Sept. 9, 14).--Koror, 1 (Nov. 7); AMNH--exact locality not given, 2 (Nov. 11, 19); Caroline Islands, USNM--Ulithi, 1 (Aug. 22). _Weights._--The present author (1948:52) recorded the weight of one male taken at Guam as 67 grams, and of two females as 57 and 63 grams. These were fall migrants taken by the NAMRU2 party. _Remarks._--The Common Sandpiper has been known from Micronesia since the time of Lesson. Tetens, Peters and Kubary obtained specimens in the Palaus; the latter collector obtained the bird at Lukunor and probably also at Truk. In recent years several collectors have taken the birds in western Micronesia, where the species appears to be a regular visitor. Field observations by the NAMRU2 party indicate that the birds are usually found as singles and remain apart from other species of migratory shorebirds which visit the islands. The margins of inland ponds and beaches consisting of rocks and pebbles appear to be preferred over the sandy, tidal flats. At Peleliu on September 9, 1945, two birds were taken at a bare bank of coral at an inland pond. These were the only two Common Sandpipers seen at the island. A specimen taken by the NAMRU2 party at Ulithi on August 22 at a beach, piled with debris from ships, has its entire and underparts stained by fuel oil. =Heteroscelus brevipes= (Vieillot) Gray-tailed Tattler _Totanus brevipes_ Vieillot, Nouv. Dict. Hist. Nat., 6, 1816, p. 410. (No locality given, the type is from Timor.) _Totanus pedestris_ Lesson, Traité d'Ornith., 1831, p. 552 (Marianne, Ualan). _Totanus brevipes_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 287, 299, 304 (Ualan, Lougounor, Guahan); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 51 (Ladrone or Marian Is.); Pelzeln, Reise "Novara," Vögel, 1865, p. 129, 162 (Puynipet, Ualan). _Totanus incanus_ Finsch and Hartlaub (part), Fauna Centralpolynesians, 1867, p. 187 (Mariannen, Ualan, Puynipet); Salvadori (part), Ornith. Papuasia, 3, 1882, p. 322 (Micronesia); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 65 (Mulgrave, Taluit, Ualan, Ponapé, Ruk, Luganor, Uap, Pelew, Marianas); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 41 (Saypan, Guam, Jaluit, Carolines, Palaos). _Heteractitis brevipes_ Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 35 (Marianas); Safford, Osprey, 1902, p. 67 (Marianas); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 180 (Uala = Truk); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 170 (Carolines). _Heteractitis brevis_ Prowazek, Die deutschen Marianen, 1913, pp. 47, 101 (Marianen). _Heteroscelus brevipes_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 367 (Western Pacific); Peters, Check-list Birds World, 2, 1934, p. 270 (Carolines). _Tringa incana brevipes_ Hartert, Vögel pal. Fauna, 13-14, 1921, p. 1623 (Guam, Truk); Hand-list Japanese Birds, rev., 1932, p. 191 (Palaus, Carolines); Hand-list Japanese Birds, 3d ed., 1942, p. 213 (Babelthuap, Koror, Angaur, Yap, Iuripik, Faraulep, Truk, Ponapé). _Heteroscelus incanus brevipes_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 47 (Pelew, Yap, Ruk); Kuroda, Avifauna Riu Kiu, 1925, p. 177 (Micronesia); Stickney, Amer. Mus. Novit., no. 1248, 1943, p. 5 (Saipan, Guam, Palau, Ruk, Kusaie); Mayr, Birds Southwest Pacific, 1945, p. 43 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 52 (Guam, Peleliu, Truk). _Heteroscelus incanus_ Wharton and Hardcastle (part), Journ. Parasitology, 32, 1946, pp. 296, 316, 318 (Guam, Peleliu). _Geographic range._--Breeds in eastern Siberia and adjacent areas. Winters south to Malaysia and east to Australia and Oceania. In Micronesia: Mariana Islands--Guam, Saipan; Palau Islands--Angaur, Peleliu, Koror, Babelthuap; Caroline Islands--Yap, Truk, Iuripik, Faraulep, Ponapé, Kusaie. _Specimens examined._--Total number, 39 (11 males, 27 females, 1 unsexed), as follows: Mariana Islands, USNM--Guam, 16 (June 4, 6, July 16, 24, Aug. 6, 27, Sept. 4, 6, 27, Oct. 23); AMNH--Saipan, 1 (Sept. 8),--Guam, 5 (Feb. 11, Mar. 4, 13, Sept. 14, Dec. 5); Palau Islands, USNM--Peleliu, 7 (Sept. 6-8, 16); AMNH--exact locality not given, 4 (Nov. 8); Caroline Islands, USNM--Truk, 1 (Dec. 13); AMNH--Truk, 3 (Feb. 6, 26, Oct. 14),--Kusaie, 2 (Mar., April). _Weights._--Weights of birds obtained by the NAMRU2 party were as follows: three males from Guam, 90-104 (95); six females from Guam, 99-116 (104). _Remarks._--It is not clear whether some of the accounts cited above refer to this species or to the species, _Heteroscelus incanus_. Owing to the fact that specimens used in some of these early reports have not been examined by me, the identifications of the birds concerned cannot be verified and consequently it is impossible to be certain to which species some of the references pertain. In listing these accounts in the literature, I am following Sharpe (1896:455) whenever possible. Tattlers were among the first birds observed and taken in Micronesia. Quoy and Gaimard found them in the Marianas, and Kittlitz and Kubary recorded the species in the Carolines. Kubary also reported the birds at the Palaus. The Gray-tailed Tattler apparently does not reach the Marshall Islands but visits only the western part of Micronesia. Stickney (1943:2) shows a map of the known geographic range of this species in Micronesia. The separation of _H. brevipes_ and _H. incanus_ in the field is not always possible. For identification, the NAMRU2 party depended primarily on specimens collected. At Guam, specimens of _H. brevipes_, thought to be nonmigratory, were taken in early June. These were in winter plumage. Beginning in mid-July there was an increase in the number of tattlers seen; apparently fall migration had begun. At Peleliu in September, 1945, the NAMRU2 party found tattlers to be numerous. Apparently all were of this species; no _H. incanus_ were taken there. On September 8, approximately 75 individuals in small and large flocks were counted at Akarakoro Point on the tidal flats. The birds remained apart from the other shorebirds which were feeding at the same locality. =Heteroscelus incanus= (Gmelin) American Wandering Tattler _Scolopax incana_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 658. (Type locality, Eimeo = Moorea, Society Islands and Palmerton Islands.) _Totanus oceanicus_ Lesson, Mamm. et Ois., 2, 1847, p. 244 (Kusaie); Hartlaub, Archiv f. Naturgesch., 1852, p. 135 (Carolinen); _idem_, Journ. f. Ornith., 1854, pp. 167, 168 (Carolinen, Mariannen). _Tryanga glareola_ Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, p. 365, 2, pp. 55, 86 (Ualan). _Totanus incanus_ Schlegel, Mus. Pays-Bas, 5, no. 27, 1864, p. 74 (Micronésie); Salvadori (part), Ornith. Papuasia, 3, 1882, p. 322 (Ualan, Puynipet, Marshalls, Mariannis); Wiglesworth (part), Abhandl. und. Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 65 (Mulgrave, Taluit, Ualan, Ponapé, Ruk, Luganor, Uap, Marianne, Pelew); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 41 (Saypan, Guam, Jaluit, Carolines, Palaos); Hartert, Novit. Zool., 5, 1898, p. 64 (Guam); _idem_, Novit. Zool. 7, 1900, p. 8 (Ruk); Schnee, Zool. Jahrbücher, 20, 1904, p. 389 (Marschall-Inseln). _Actitis incanus_ Finsch and Hartlaub (part), Fauna Centralpolynesions, 1867, p. 187 (Mariannen, Ualan, Puynipet); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 106 (Uap, Ualan); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 36 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 38 (Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 294, 306 (Ponapé, Kuschai, Marshalls); _idem_, Ibis, 1881, pp. 105, 109, 115 (Kushai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 299 (Mortlock); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 55 (Jaluit, Arno, Kuschai). _Actitis incana_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); _idem_, Proc. Zool. Soc. London, 1880, p. 576 (Ruk); _idem_, Ibis, 1880, pp. 219, 220, 330, 332 Milli or Mulgrave, Taluit). _Heteractitis incanus_ Sharpe, Cat. Birds British Mus., 24, 1906, p. 455 (Oceania); Safford, The Plant World, 7, 1904, p. 268 (Guam); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Yap, Ruk, Ponapé, Kusaie); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 179 (Kusaie); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 70 (westcentral Pacific). _Heteroscelus incanus_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 367 (Carolines, Marianas); Peters, Check-list Birds World, 2, 1934, p. 270 (Micronesia); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam): Watson, The Raven, 17, 1946, p. 42 (Guam); Wharton and Hardcastle (part), Journ. Parasitology, 32, 1946, pp. 296, 316, 318 (Guam, Peleliu); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 93 (Tinian); Strophlet, Auk, 1946, p. 537 (Guam); Wharton, Ecol. Monogr., 16, 1946, pp. 174, 175 (Guam); Borror, Auk, 1947, p. 417 (Agrihan). _Tringa incana incana_ Hartert, Vögel pal. Fauna, 13-14, 1921, p. 1623 (Guam); Hand-list Japanese Birds, rev., 1932, p. 191 (Marianas, Carolines, Marshalls, Palaus); Hand-list Japanese Birds, 3d ed., 1942, p. 214 (Saipan, Guam, Koror, Angaur, Yap, Faraulep, Lamatrek, Truk, Ponapé, Kusaie, Jaluit, Mille, Arhno, Majuro, Maloelab, Wotze, Likieb, Ailuk). _Heteroscelus incanus incanus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 46 (Kusaie, Ruk, Ponapé, Yap, Marianas, Mulgrave, Taluit, Pelew); Stickney, Amer. Mus. Novit., no. 1248, 1943, p. 7 (Guam, Palau, Ponapé, Ruk, Kusaie); Mayr, Birds Southwest Pacific, 1945, p. 42 (Palau, Marianas); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 53 (Guam, Rota, Ulithi). _Geographic range._--Breeds in Alaska south to Prince William Sound. Winters in North and South America and west in Oceania to Melanesia. In Micronesia: Mariana Islands--Guam, Rota, Saipan, Agrihan; Palau Islands--Angaur, Koror; Caroline Islands--Yap, Ulithi, Truk, Faraulep, Lamatrek, Ponapé, Kusaie; Marshall Islands--Jaluit, Mille, Arhno, Majuro, Maloelab, Wotze, Likieb, Ailuk, Bikini. _Specimens examined._--Total number, 47 (23 males, 20 females, 4 unsexed) as follows: Mariana Islands, USNM--Guam, 13 (May 21-29, Sept. 19-27, Oct. 10, 23),--Rota, 2 (Oct. 23, 25); AMNH--Guam, 4 (April 23, Aug. 16); Palau Islands, AMNH--exact locality not given, 1 (no date); Caroline Islands, USNM--Ulithi, 3 (Aug. 20, 22); AMNH--Truk, 1 (June 25),--Ponapé, 1 (Dec. 15),--Kusaie, 19 (Feb., Mar., April 1-10); Marshall Islands, USNM--Bikini, 3 (Feb. 26, 28, April 28). _Weights._--In 1948 (1948:53) I listed weights of two males from Guam as 175 (May) and 109 (September); weights of two females from Guam were 175 and 192 (both in May). These data were obtained by the NAMRU2 field party. _Parasites._--Wharton and Hardcastle (1946:296, 316, 318) list the following chiggers (Acarina) from tattlers taken by NAMRU2 collectors at Guam and Peleliu: _Neoschöngastia bougainvillensis_, _N. ewingi_, _N. carveri_, and _N. namrui_. Wharton (1946:174, 175) records the chiggers, _Acariscus pluvius_ and _A. anous_, from tattlers from Guam. It is not certain from which species of _Heteroscelus_ these chiggers were obtained. _Remarks._--Records indicate that the American Wandering Tattler is a regular visitor to eastern Micronesia, and that it only occasionally reaches the Palau Islands in western Micronesia. The NAMRU2 field parties found _H. brevipes_ as singles or in small groups of five or less. They remained apart from other species and appeared to prefer rocky beaches and coral-reef rocks to the sandy beaches. At Guam in 1945, the latest spring migrants were taken on May 29. These birds were in nuptial plumage. Birds taken at Bikini by Morrison on February 26 and April 28, 1946, were in worn, winter plumage. At Guam, the NAMRU2 observers obtained the first fall migrants on September 19. These observations in 1945, showed that _H. incanus_ arrived at Guam on its southbound flight fully one month after the first individuals of _H. brevipes_ began to appear (mid-July). This difference may partly result from the fact that the distance to the Asiatic breeding grounds of _H. brevipes_ is not so great as that to the American breeding grounds of _H. incanus_. Whether the two tattlers, _H. brevipes_ and _H. incanus_, are distinct species (allopatric species insofar as breeding ranges are concerned), or whether they are mere subspecies (geographic races) is open to question. I failed to find evidences of intergradation in the few specimens which I examined critically; however, the final answer to the problem might be obtained by collecting series of birds from breeding grounds where ranges closely approach each other or overlap (if they do). Stickney (1943:6, 7) lists the distinctive differences in these two birds, particularly the character of the nasal groove, and does not mention having found any evidence of intergradation. Wetmore (in Townsend and Wetmore, 1919:180) gives evidence that they belong to two separate species. =Arenaria interpres interpres= (Linnaeus) Turnstone _Tringa Interpres_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 148. (Type locality, Europe and North America, restricted to Gotland, Sweden.) _Tringa interpres_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, p. 708 (Guam). _Strepsila collaris_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 287, 299, 304 (Ualan, Lougounor, Guahan); _idem_, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 32 (Ualan). _Strepsilas interpres_ Kittlitz, Denk. Reise russ. Amer. Micron. und Kamchat., 2, 1858, pp. 32, 55, 86 (Ualan); Pelzeln, Reise "Novara," Vögel, 1865, p. 117 (Mariannen); Finsch and Hartlaub, Fauna Ornith. Centralpolynesian, 1867, p. 200 (Mariannen); Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 104 (Pelew, Uap, Mackenzie); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 32 (Palau); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); _idem_, Ibis, 1880, pp. 220, 330, 332 (Taluit); _idem_, Journ. f. Ornith., 1880, pp. 294, 306 (Ponapé, Kuschai); _idem_, Proc. Zool. Soc. London, 1880, p. 576 (Ruk); _idem_, Ibis, 1881, pp. 105, 109, 115 (Kushai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 330, 353 (Ponapé, Nukuor, Ruk); Salvadori, Ornith. Papuasia, 3, 1882, p. 289 (Pelew, Mariannis); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 56 (Jaluit, Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891); p. 63 (Ualan, Ponapé, Luganor, Nukuor, Ruk, Mackenzie, Pelew, Marianne); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 45 (Guam, Saypan, Hogoleu, Marshalls, Mackensie, Palaos); Hartert, Novit. Zool., 5, 1898, p. 66 (Guam); _idem_, Novit. Zool., 7, 1900, p. 9 (Ruk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 51 (Ponapé); Uchida, Annot. Zool. Japon., 9, 1918, p. 489 (Ponapé). _Cinclus interpres_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 48 (Ladrones). _Arenaria interpres_ Sharpe, Cat. Birds British Mus., 24, 1896, p. 92 (Micronesia); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 37 (Guam); Safford, Osprey, 1902, p. 68 (Marianas); _idem_, The Plant World, 7, 1904, p. 266 (Guam); Schnee, Zool. Jahrbücher, 20, 1904, p. 389 (Marshall Islands); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam), Cox, Island of Guam, 1917, p. 22 (Guam); Wharton and Hardcastle, Journ. Parasitology, 32, 1946, pp. 316, 320 (Guam, Peleliu); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 105 (Tinian); Strophlet, Auk, 1946, p. 537 (Guam); Wharton, Ecol. Monogr., 16, 1946, pp. 174, 175 (Guam); Borror, Auk, 1947, p. 417 (Agrihan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 53 (Guam, Rota, Peleliu, Truk). _Arenaria interpres oahuensis_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 66, 1919, p. 177 (Jaluit, Rongelab, Uala); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 45 (Guam, Saipan, Pelew, Angaur, Kusaie, Ponapé, Luganor, Nukuor, Ruk, Yap, Mackenzie, Taluit, Rongelab). _Arenaria interpres interpres_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 45 (Micronesia); Hand-list Japanese Birds, rev., 1932, p. 194 (Guam, Saipan, Anguar, Kusaie, Ponapé, Luganor, Nukuor, Ruk, Yap, Mackenzie, Taluit, Rongelab, Mille, Majuro, Wotze, Likieb); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 217 (Guam, Saipan, Angaur, Kusaie, Ponapé, Luganor, Ruk, Yap, Mackenzie, Taluit, Rongelab, Mille, Majuro, Wotze, Likieb); Stickney, Amer. Mus. Novit., no. 1248, 1943, p. 8 (Guam, Palau, Ponapé, Kusaie). _Geographic range._--Breeds in northern parts of the Northern Hemisphere. Winters to Southern Hemisphere. In Micronesia: Mariana Islands--Guam, Rota, Saipan; Palau Islands--Angaur, Peleliu, Caroline Islands--Yap, Ulithi, Truk, Lugunor, Nukuor, Ponapé, Kusaie; Marshall Islands--Jaluit, Rongelab, Mille, Majuro, Wotze, Likieb, Bikini. _Specimens examined._--Total number, 36 (17 males, 16 females, 3 unsexed), as follows: Mariana Islands. USNM--Guam, 7 (Oct. 10-26)--Rota, 2 (Oct. 20, Nov. 2); AMNH--Guam, 4 (Mar. 22, 27, Aug. 18); Palau Islands, USNM--Peleliu, 1 (Sept. 8); AMNH--exact locality not given, 3 (Dec. 8); Caroline Islands, USNM--Truk, 1 (Dec. 22); AMNH--Ponapé, 4 (Dec. 16)--Truk, 4 (Feb. 5, 7, July 14)--Kusaie, 7 (Mar. 10-30); Marshall Islands, USNM--Bikini, 3 (Feb. 26, Mar. 4). _Weights._--The NAMRU2 party obtained the weights of four males taken at Guam and Rota as 77-99 (92) and one female from Guam as 90. These birds were obtained in October and November. _Parasites._--Wharton and Hardcastle (1946:316, 320) list the following chiggers (Acarina) from the Turnstone from Guam and Peleliu: _Neoschöngastia carveri_ and _N. strongi_. Wharton (1946:174) records also _Acariscus anous_ from the Turnstone at Guam. Uchida (1918:489) records the bird louse (Mallophaga), _Colpocephalum pediculoides_, from this bird at Ponapé. _Remarks._--The Turnstone is a regular visitor to Micronesia and to most other parts of Oceania. As pointed out by Stickney (1943:8), the material obtained by the Whitney South Sea Expedition yields evidence that the population which winters in Oceania is as widespread as that of _Pluvialis dominica fulva_ but less abundant. The writer's observations at Guam, Ulithi and the Palaus are in agreement with this evidence. Stickney suggests that the reason the Turnstone was not recorded by the Whitney South Sea Expedition in eastern Polynesia was because of "a tendency of the turnstone to hug the continental coasts more closely, avoiding extensive overseas migrations." At Guam in 1945, the NAMRU2 party recorded the Turnstone on its northward migration as late as March 19; on its southward migration it was first seen at Guam on July 24. On its southward migration the bird was not numerous until September. Our observations indicated that in 1945, the principal waves of migration of the Turnstone appeared approximately two weeks after those of the Pacific Golden Plover and the Whimbrel. Stickney remarks that the spring migratory season in Oceania is completed in May and that the fall migratory season begins in August. Borror (1947:417) found small flocks on the beaches at Agrihan on August 10 and 11, 1945. Bryan and Greenway (1944:112) indicate that the subspecies, _Arenaria interpres morinella_, which breeds in North America, east of Point Barrow, Alaska, may reach the Hawaiians. Careful examination of specimens from eastern Micronesia might reveal its presence there also. The name _Areneria interpres oahuensis_ (Bloxham) may apply to specimens from eastern Micronesia but Peters (1934:271) considers _oahuensis_ to be inseparable from _Arenaria interpres interpres_ (Linnaeus). =Gallinago megala= Swinhoe Marsh Snipe _Gallinago megala_ Swinhoe, Ibis, 1861, p. 343. (Type locality, Between Takoo and Pekin, China. _Gallinago heteroeaca_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 36 (Palau). _Gallinago megala_ Salvadori, Ornith. Papuasia, 3, 1882, p. 337 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 67 (Pelew); Sharpe, Cat. Birds British Mus., 24, 1896, p. 624 (Pelew); Hartert, Novit. Zool., 5, 1898, p. 65 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 33 (Mariannas); Safford, Osprey, 1902, p. 67 (Mariannas); _idem_, The Plant World, 7, 1904, p. 266 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Hartert, Vögel pal. Fauna, 13-14, 1921, p. 1665 (Palau, Guam); Mayr, Birds Southwest Pacific, 1945, p. 44 (Guam, Palau); Strophlet, Auk, 63, 1946, p. 537 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 54 (Angaur). _Subspilura megala_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 49 (Guam, Pelew). _Capella megala_ Hand-list Japanese Birds, rev., 1932, p. 193 (Guam, Koror); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Robinson and Chasen, Birds Malay Peninsula, 3, 1936, p. 170 (Pelew, Marianne); Hand-list Japanese Birds, 3d ed., 1942, p. 316 (Guam, Koror). _Geographic range._--Breeds in east-central Asia. Winters south to Malaysia, Australia, and parts of Melanesia. In Micronesia: Mariana Islands--Guam; Palau Islands--Koror, Angaur. _Specimens examined._--One female from Palau Islands, USNM--Angaur (Sept. 21). _Remarks._--The Marsh Snipe is a regular visitor to western Micronesia, being recorded from the Mariana and Palau islands. At Angaur on September 21, 1945, the NAMRU2 party observed four birds at the edge of a brackish water swamp, which was margined with reeds and other vegetation. Birds were not seen on tidal beaches at Peleliu. Strophlet (1946:537) records the Marsh Snipe at Guam on October 21 and December 3, 1945. =Gallinago gallinago gallinago= (Linnaeus) Common Snipe _Scolopax Gallinago_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 147. (Europe, restricted type locality, Sweden.) _Capella gallinago roddei_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 224 (Saipan). _Capella gallinago gallinago_ Hand-list Japanese Birds, rev., 1932, p. 193 (Saipan); Hand-list Japanese Birds, 3d ed., 1942, p. 216 (Saipan). _Gallinago gallinago_ Mayr, Birds Southwest Pacific, 1945, p. 44 (Saipan). _Geographic range._--Breeds in northern Eurasia. Winters in southern part of breeding range and south to Africa and east to Malaysia. In Micronesia: Mariana Islands--Saipan. _Remarks._--From Micronesia there is a single record of the taking of this bird at Saipan, apparently by Japanese collectors. It is probably an occasional straggler to the area, but owing to its similarity to _Gallinago megala_ it may not often be recognized in the field. =Crocethia alba= (Pallas) Sanderling _Trynga alba_ Pallas, in Vroeg's Cat., 1764, Adumbr., p. 7. (Type locality, Coast of the North Sea.) _Calidris arenaria_ Finsch, Ibis, 1880, pp. 331, 332 (Taluit); _idem_, Mitth. Ornith. Ver. Wien, 1884, p. 56 (Jaluit); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 33 (Guam); Safford, Osprey, 1902, p. 70 (Mariannes); _idem_, The Plant World, 7, 1904, p. 268 (Guam); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln). _Tringa arenaria_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 64 (Taluit); Hartert, Novit. Zool., 5, 1898, pp. 65, 69 (Guam). _Calidris alba_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 308 (Marshall Islands). _Crocethia alba_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 48 (Taluit, Guam); Hand-list Japanese Birds, rev., 1932, p. 193 (Taluit, Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 215 (Jaluit, Guam); Stickney, Amer. Mus. Novit., no. 1248, 1943, p. 9 (Guam, Jaluit); Mayr, Birds Southwest Pacific, 1945, p. 44 (Marianas, Marshalls); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 54 (Ulithi). _Geographic range._--Breeds in Arctic regions of the Northern Hemisphere. Winters to Southern Hemisphere. In Micronesia: Mariana Islands--Guam; Caroline Islands--Ulithi; Marshall Islands--Jaluit. _Specimens examined._--Total number, 5 (2 males, 3 females), as follows: Mariana Islands, AMNH--Guam, 4 (Dec. 2-4); Caroline Islands, USNM, 1 (Aug. 21). _Remarks._--Stickney (1943:8, 9) summarizes the available information concerning the Sanderling in Oceania. The bird may be classed as a regular visitor in eastern Micronesia; the most western record is from Ulithi in the western Carolines. It has been recorded also at Guam and Jaluit. The NAMRU2 party secured one Sanderling from a flock of approximately thirty birds containing this species and _Charadrius mongolus stegmanni_ at Pau Island, Ulithi Atoll, on August 21, 1945. =Calidris tenuirostris= (Horsfield) Asiatic Knot _Totanus tenuirostris_ Horsfield, Trans. Linn. Soc. London, 13, pt. 1, 1821, p. 192. (Type locality, Java.) _Calidris tenuirostris_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 54 (Peleliu). _Geographic range._--Breeds in northeastern Siberia. Winters from India east to Malaysia and Australia. In Micronesia: Palau Islands--Peleliu. _Specimens examined._--Four males from Palau Islands, USNM--Peleliu (Sept. 16). _Remarks._--The Asiatic Knot was observed and obtained by the NAMRU2 party at Peleliu in September, 1945. Flocks containing fifteen to twenty birds were noted at the tidal flats of Akarakoro Point on September 8 and 16. The birds appeared to remain apart from other shore birds in this area. =Erolia minuta ruficollis= (Pallas) Little Stint _Trynga ruficollis_ Pallas, Reise versch. Prov. Russ. Reichs, 3, 1776, p. 700. (Type locality, "Circa lacus salsos Dauriae campestris" = Kulussutai, southern Transbaikalia.) _Tringa minuta_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 118 (Pelew); Gray, Hand-list Birds, pt. 3, 1871, p. 50 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 106 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 36 (Palau). _Tringa albescens_ Salvadori, Ornith. Papuasia, 3, 1882, p. 316 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 64 (Pelew). _Limonites minuta_ Takatsukasa and Kudora, Tori, 1, 1915, p. 62 (Pelew). _Pisobia ruficollis_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 290 (Pelew). _Pisobia minuta ruficollis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 48 (Palau, Ulithi); Hand-list Japanese Birds, rev., 1932, p. 192 (Palau, Ulithi). _Calidris ruficollis ruficollis_ Hand-list Japanese Birds, 3d ed., 1942, p. 215 (Palau, Ulithi). _Calidris minuta ruficollis_ Mayr, Birds Southwest Pacific, 1945, p. 45 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 54 (Rota, Peleliu). _Geographic range._--Breeds from northeastern Siberia to northwestern Alaska. Winters south from the Malay area to Australia. In Micronesia: Mariana Islands--Rota; Palau Islands--Angaur, Peleliu; Caroline Islands--Ulithi. _Specimens examined._--Total number, 16 (4 males, 12 females), as follows: Mariana Islands, USNM--Rota, 1 (Oct. 20); Palau Islands, USNM--Peleliu, 14 (Sept. 6-14)--Angaur, 1 (Sept. 21). _Remarks._--The Little Stint is apparently a regular visitor to the Palau Islands and a less common visitor to the Mariana Islands. At Peleliu and Angaur the NAMRU2 party found these birds in small flocks of 10 to 15 at tidal flats and at inland ponds. On tidal flats the species appeared to remain apart from other kinds of shore birds, but at inland ponds the Little Stint was found in company with other species. On shooting into a mixed flock of shore birds at an island pond at Angaur, the writer secured specimens of this species and also of _Erolia acuminata_. =Erolia subminuta= (Middendorff) Least Sandpiper _Tringa subminuta_ Middendorff, Reise Nord. und Ost. Siberien, 2, Th. 2, 1853, p. 222, pl. 19, fig. 6. (Type locality, Western slopes of the Stanovoi Mountains and mouth of the Udá.) _Pisobia minutilla subminuta_ Hand-list Japanese Birds, rev., 1932, p. 192 (Koror). _Calidris minutilla subminuta_ Hand-list Japanese Birds, 3d ed., 1942, p. 215 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 45 (Palau). _Geographic range._--Breeds in northeastern Asia. Winters south to India and east to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Least Sandpiper has been recorded in the Palau Islands by the Japanese investigators. It is probably an uncommon visitor to this area. =Erolia melanotos= (Vieillot) Pectoral Sandpiper _Tringa melanotos_ Vieillot, Nouv. Dict. Hist. Nat., 34, 1819, p. 462. (Type locality, Paraguay.) _Pisobia melanota_ Hand-list Japanese Birds, rev., 1932, p. 192 (Ponapé). _Calidris melanotos_ Hand-list Japanese Birds, 3d ed., 1942, p. 215 (Ponapé). _Calidris melanota_ Mayr, Birds Southwest Pacific, 1945, p. 45 (Ponapé). _Geographic range._--Breeds on the Arctic coast of northeastern Asia and eastward into Arctic America. Winters to South America. In Micronesia: Caroline Islands--Ponapé. _Remarks._--The Pectoral Sandpiper has been recorded from Ponapé. Bryan and Greenway (1944:114) list the species as an "accidental" visitor to the Hawaiian Islands from North America. =Erolia acuminata= (Horsfield) Sharp-tailed Sandpiper _Totanus acuminatus_ Horsfield, Trans. Linn. Soc. London, 13, pt. 1, 1821, p. 192. (Type locality, Java.) _Tringa acuminata_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 8, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 106 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 35 (Palau); Salvadori, Ornith. Papuasia, 3, 1882, p. 314 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 64 (Pelew); Hartert, Novit. Zool., 5, 1898, p. 65 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 33 (Guam); Safford, Osprey, 1902, p. 70 (Marianas); _idem_, The Plant World, 7, 1904, p. 268 (Guam). _Heteropygia acuminata_ Sharpe, Cat. Birds British Mus., 24, 1896, p. 566 (Pelew); Hartert, Novit. Zool., 7, 1900, p. 8 (Ruk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Marianas, Ruk, Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 48 (Pagan, Pelew, Ruk). _Tringa maculata_ var. _acuminata_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3) 8, 1896, p. 44 (Pagan, Palaos). _Pisobia acuminata_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 276 (Caroline Islands). _Erolia acuminata_ Hartert, Vögel pal. Fauna, 11-12, 1920, p. 1586 (Palau, Karolinen); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam). _Pisobia acuminatus_ Hand-list Japanese Birds, rev., 1932, p. 192 (Ponapé, Truk, Pagan, Jaluit, Koror). _Calidris acuminata_ Hand-list Japanese Birds, 3d ed., 1942, p. 215 (Pagan, Jaluit, Koror, Truk, Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 45 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 54 (Guam, Angaur). _Geographic range._--Breeds in northeastern Siberia. Winters from the Malay Archipelago and Australia to the Southwest Pacific. In Micronesia: Mariana Islands--Guam, Pagan; Palau Islands--Angaur; Caroline Islands--Truk, Ponapé; Marshall Islands--Jaluit. _Specimens examined._--Total number, 4 (2 males, 2 females), as follows: Mariana Islands, USNM--Guam, 1 (Sept. 17); Palau Islands, USNM--Angaur, 3 (Sept. 21). _Remarks._--The Sharp-tailed Sandpiper is a regular visitor to western Micronesia and an uncommon visitor to eastern Micronesia. It was first recorded from the Palau Islands in 1868, where the bird was taken by Tetens, Heinsohn, and Kubary. In 1896 and 1898, records of this bird in the Mariana and Caroline islands were published by Oustalet and Hartert. The NAMRU2 party obtained one specimen at Guam on September 17 and three at Angaur on September 21. At Angaur several birds of this species were seen at fresh water ponds in company with _Erolia minuta ruficollis_, _Limicola falcinellus sibirica_, _Tringa glareola_, and other shore birds. =Erolia ferruginea= (Pontoppidan) Curlew Sandpiper _Tringa ferrugineus_ Pontoppidan, Danske Atlas, 1, 1763, p. 624. (No type locality = Denmark.) _Calidris ferruginea_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 55 (Peleliu). _Geographic range._--Breeds in northern Asia. Winters from Africa east to Australia. In Micronesia: Palau Islands--Peleliu. _Specimens examined._--One female from Palau Islands, USNM--Peleliu (Sept. 6). _Remarks._--The NAMRU2 party obtained one female on September 6 at a tidal flat on Peleliu. The Curlew Sandpiper is seemingly a rare visitor to the Palau Islands from Asia. In using this specific name, I am following Mayr (in Delacour and Mayr, 1945:107). =Limicola falcinellus sibirica= Dresser Broad-billed Sandpiper _Limicola sibirica_ Dresser, Proc. Zool. Soc. London, 1876, p. 674. (Type locality, Siberia and China.) _Limicola falcinellus sibirica_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 55 (Angaur). _Geographic range._--Breeds in northeastern Asia. Winters from India east to Australia. In Micronesia: Palau Islands--Angaur. _Specimens examined._--One male from Palau Islands, USNM--Angaur (Sept. 21). _Remarks._--A single male bird was taken by the NAMRU2 party at a fresh water pond on Angaur Island on September 21, 1945. This is the only known record for this bird from Micronesia. =Phalaropus lobatus= (Linnaeus) Northern Phalarope _Tringa lobata_ Linnaeus, Syst. Nat., ed. 10, 1, 1758, p. 148, in Emendanda, p. 824. (Type locality, Hudson Bay.) _Geographic range._--Breeds throughout Arctic region. Winters at sea in tropical and subtropical waters. _Remarks._--The Northern Phalarope has not been found in Micronesia. Mayr (1945a:46) records it in the pelagic areas north of the New Guinea region. The occurrence there suggests that migration is through the Micronesian area. =Larus argentatus vegae= Palmén Herring Gull _Larus argentatus_ Brünn. var. _Vegae_ Palmén, in Nordenskiöld, Vega-Exped. Vetensk. Iakttag., 5, 1887, p. 370. (Type locality, Pidlin, northeastern Siberia.) _Larus vegae_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 56 (Agrigan); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 20 (Marianas); Safford, Osprey, 1902, p. 70 (Marianas); _idem_, The Plant World, 7, 1904, p. 268 (Guam?). _Larus vegae_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Marianas). _Larus argentatus vegae_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 49 (Agrigan); Hand-list Japanese Birds, rev., 1932, p. 196 (Agrigan); Hand-list Japanese Birds, 3d ed., 1942, p. 220 (Agrigan). _Geographic range._--Breeds in northern Siberia. Ranges east to Alaska and south to the Philippines and the China coast. In Micronesia: Mariana Islands--Agrihan. _Remarks._--The Herring Gull is ascribed to Micronesia on the basis of one bird obtained by Marche in January, 1889, at Agrihan in the northern Marianas and reported on by Oustalet (1896:56). The gull is considered a straggler to the northern Marianas from the northward. Stott (1947:525) observed a gull, which was thought to be this species or _Larus ridibundus_, at Lake Susupe, Saipan, in 1945. =Chlidonias leucopterus= (Temminck) White-winged Black Tern _Sterna leucoptera_ Temminck, Man. d'Ornith., 1815, p. 483. (Type locality, Coasts of the Mediterranean.) _Hydrochelidon leucoptera_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 57 (Guam); Hartert, Novit. Zool., 5, 1898, p. 67 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 20 (Guam); Safford, Osprey, 1902, p. 70 (Marianas); _idem_, The Plant World, 7, 1904, p. 268 (Guam); Hartert, Vögel pal. Fauna, 13-14, 1921, p. 1686 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 51 (Guam). _Chlidonias leucoptera_ Hand-list Japanese Birds, rev., 1932, p. 194 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 217 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 55 (Angaur). _Geographic range._--Breeds in central and southern Eurasia. Winters from Africa east to Australia. In Micronesia: Mariana Islands--Guam; Palau Islands--Angaur. _Measurements._--One adult male has the following measurements: wing, 211; tail, 72; exposed culmen, 27; tarsus, 20; one adult female: wing, 210; exposed culmen, 25.5. These specimens were taken at the Palau Islands. _Specimens examined._--Total number, 6 (3 males, 3 females), as follows: Palau Islands, USNM--Angaur, 1 (Sept. 21); AMNH--exact locality not given, 5 (Oct. 13). _Remarks._--The White-winged Black Tern was first collected at Guam in October, 1887, by Marche and reported on by Oustalet (1896:57). It was later taken at the Palau Islands by Coultas in 1931, and by the NAMRU2 party at Angaur in 1945. The bird is seemingly an uncommon winter visitor to Micronesia. At Angaur, the NAMRU2 party obtained one of four terns seen at a small fresh water lake. Coultas took five birds at the Palau Islands. He writes (field notes) that a flock of 14 of the terns appeared at the island following a heavy typhoon. All birds examined are in winter plumage (September and October). =Sterna hirundo longipennis= Nordmann Black-billed Common Tern _Sterna longipennis_ Nordmann, in Erman's Verz. Thier. Pflanz., 1835, p. 17. (Type locality, Mouth of the Kutchui River, Sea of Okhotsk.) _Sterna longipennis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 112 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 41 (Palau); Salvadori, Ornith. Papuasia, 3, 1882, p. 440 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 74 (Pelew); Saunders, Cat. Birds British Mus., 25, 1896, p. 67 (Pelew); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 21 (Pelew). _Sterna hirundo longipennis_ Hand-list Japanese Birds, rev., 1932, p. 195 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 218, (Palau); Mayr, Birds Southwest Pacific, 1945, p. 25 (Palau). _Geographic range._--Breeds in northeastern Asia. Winters south to Melanesia. In Micronesia: Palau Islands--exact locality unknown. _Remarks._--Finsch (1875:41) states that Heinsohn and Kubary obtained specimens of this tern from the Palau Islands for the Godeffroy Museum. These are the only records for the occurrence of the Black-billed Common Tern in Micronesia. =Sterna sumatrana sumatrana= Raffles Black-naped Tern _Sterna Sumatrana_ Raffles, Trans. Linn. Soc. London, 13, pt. 2, 1822, p. 329. (Type locality, Sumatra.) _Sterna melanauchen_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 306, 308 (Guahan, Ouleai); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 113 (Pelew, Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 41 (Palau); _idem_, Ibis, 1880, pp. 220, 330, 332 (Taluit); _idem_, Journ. f. Ornith., 1880, p. 295 (Ponapé); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, pp. 113, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 299, 330, 353 (Ponapé, Mortlock, Nukuor, Ruk); Salvadori, Ornith. Papuasia, 3, 1882, p. 444 (Pelew, Mackenzie, Ruk, Ponapé, Marshalls); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 74 (Pelew, Uap, Ruk, Luganor, Nukuor, Ponapé, Taluit); Sanders, Cat. Birds British Mus., 25, 1896, p. 126 (Carolines, Pelews, Marshalls); Nehrkorn, Kat. Eiers., 1899, p. 222 (Palau); Hartert, Novit. Zool., 7, 1900, p. 10 (Ruk); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Ruk, Ponapé); Uchida, Annot. Zool. Japon., 9, 1918, pp. 483, 488 (Ponapé). _Sterna sumatrana_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 186 (Arhno). _Gygisterna sumatrana_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 52 (Pelew, Mackenzie, Yap, Ruk, Luganor, Nukuor, Ponapé, Taluit, Arhno). _Gygisterna sumatrana sumatrana_ Kuroda, Avifauna Riu Kiu, 1925, p. 192 (Carolines, Pelews). _Sterna sumatrana sumatrana_ Yamashina, Tori, 7, 1932, p. 410 (Aruno); Hachisuka, Birds Philippines, 2, 1932, p. 335 (Caroline, Pelew); Hand-list Japanese Birds, rev., 1932, p. 195 (Palau, Guam, Saipan, Yap, Truk, Lukunor, Nukuoro, Ponapé, Jaluit, Namu, Arhno, Majuro, Aurh); Peters, Check-list Birds World, 2, 1934, p. 336 (Caroline Islands); Mayr, List New Guinea Birds, 1941, p. 36 (Micronesia); Hand-list Japanese Birds, 3d ed., 1942, p. 218 (Babelthuap, Koror, Yap, Truk, Lukunor, Nukuoro, Ponapé, Jaluit, Namu, Arhno, Majuro, Aurh); Mayr, Birds Southwest Pacific, 1945, p. 24 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 55 (Peleliu, Ulithi). _Geographic range._--Micronesia, central Polynesia, northern Australia, Malaysia, west to India, and north to the Riu Kiu Islands. In Micronesia: Palau Islands--Babelthuap, Koror, Peleliu; Caroline Islands--Yap, Ulithi, Truk, Lukunor, Nukuoro, Ponapé; Marshall Islands--Jaluit, Namu, Majuro, Aurh, Bikini. _Characters._--Adult: A small tern with a long, forked tail and white plumage often with pinkish cast except for mantle, back, rump, tail, wing-coverts, and scapulars which are pale pearl-gray; band across nape, spot in front of eye, and outer web of outer primary black; bill and feet black. Immature: Resembles adult, but black and white mottling on upper parts. _Measurements._--Measurements are listed in table 19. _Specimens examined._--Total number, 15 (8 males, 6 females, 1 female?), as follows: Palau Islands, AMNH--exact locality not given, 4 (Oct.-Dec.); Caroline Islands, USNM--Ulithi Atoll, 6 (Aug. 15, 16, 20, 22); AMNH--Truk, 1 (Feb. 10); Marshall Islands, USNM--Bikini, 4 (March 26, April 30). _Nesting._--Nehrkorn (1899:222) recorded eggs taken at the Palau Islands. Yamashina (1932a:410) listed the finding of three nests containing one egg each on September 26, 1931, at Arhno in the Marshall Islands. The NAMRU2 party obtained no evidence of nesting at Ulithi or Palau in August and September, 1945. Coultas (field notes) obtained reports of the finding of two eggs at the Palau Islands in the period October to December, 1931. _Parasites._--Uchida (1918:483, 488) records the following Mallophaga taken at Ponapé from this tern: _Docophorus albemarlensis_, _Colpocephalum milleri_, and _Colpocephalum impertunum_. _Remarks._--There are no records for the Black-naped Tern from the Mariana Islands, although the species is known from the Palau, Caroline and Marshall Islands. At Ulithi Atoll, the NAMRU2 party observed these terns at the islands of Potangeras, Mangejang, Pau, and Losiep in August, 1945. They were found in groups of 4 to 15, either sitting on sandy beaches or rocky exposures or flying over the reefs. Unlike the Crested Tern, these birds appeared quite unafraid of man and would hover over a freshly killed or wounded individual of their own kind, making of themselves easy targets. The writer saw only one Black-naped Tern at the Palau Islands (Peleliu, on September 16, 1945). The birds seem to prefer the "low" atolls to the "high" volcanic islands of Micronesia. Two subspecies of _Sterna sumatrana_ are recognized by Peters (1934:336): _Sterna sumatrana mathewsi_ known from islands of the western Indian Ocean and _Sterna s. sumatrana_ from islands of Oceania, Australia, Malaysia, and China coast. There is a considerable area separating these subspecies. For populations in the Pacific area, other names which have been proposed are _Sterna sumatrana kempi_ Mathews for birds from Torres Straits and _Gygis decorata_ Hartlaub for birds from the Fiji Islands. A study of 201 specimens of this species from various parts of its range (in the collections of the American Museum of Natural History and the United States National Museum) shows that there is little color variation within the species. This observation is the same as that of Mathews (1912:372). As listed in table 19, measurements of the length of the wing show little variation. The length of the tail of birds from localities more remote from the continent of Asia (Micronesia, Phoenix, Union, Fiji, Samoa, Tonga, and the islands of the Indian Ocean: Aldabra and Providence) is, on the average, shorter than the length of the tail of birds from islands nearer the Asiatic mainland. This shortness is reflected also in the measurement of the difference between the shortest and longest tail feather. TABLE 19. MEASUREMENTS OF SPECIMENS OF _Sterna sumatrana_ Columb headings: A: No. B: Wing C: Tail D: Difference: Longest and shortest tail feather E: Exposed culmen F: Tarsus ===================+===+=========+=========+=======+==========+========== LOCALITY | A | B | C | D | E | F -------------------+---+---------+---------+-------+----------+---------- _S. s. sumatrana_ | | | | | | Micronesia | 13| 221 | 127 | 65 | 37 | 20.5 | | 211-225 | 117-138 | 54-79 | 35-39 | 20.0-21.0 | | | | | | Phoenix and Union| 5| 228 | 113 | 66 | 37 | 19.5 | | | | | 36-38 | 18.5-20.0 | | | | | | Fiji, Samoa, | 29| 221 | 131 | 63 | 38 | 20.0 Tonga | | 218-229 | 122-142 | 51-74 | 36-41 | 18.0-21.0 | | | | | | New Caledonia, | 8| 224 | 141 | 72 | 39 | 19.5 Loyalty, New | | 221-230 | 135-148 | 68-81 | 37-41 | 18.5-20.0 Hebrides | | | | | | | | | | | | Queensland, | 4| 229 | 142 | 78 | 38 | 19.5 Torres Straits | | | 139-148 | 71-83 | 36-40 | 18.5-20.0 | | | | | | Solomons | 52| 227 | 144 | 77 | 36 | 19.0 | | 220-232 | 129-162 | 66-95 | 34.0-38.5| 18.5-20.5 | | | | | | New Guinea, | 10| 224 | 143 | 76 | 34 | 19.5 Bismarcks | | 219-231 | 135-146 | 67-81 | 32.0-36.5| 18.5-20.0 | | | | | | Malay area | 49| 228 | 141 | 74 | 34 | 20.0 | | 220-234 | 125-153 | 63-84 | 32.0-37.0| 19.0-20.5 | | | | | | China coast, | 21| 223 | 144 | 77 | 35 | 19.5 Riu Kiu | | 212-234 | 130-151 | 67-85 | 31.5-38.0| 19.0-20.0 | | | | | | _S. S.mathewsi_ | | | | | | Indian Ocean: | 10| 220 | 125 | 71 | 38 | 19.0 Aldabra, | | | | | 35.0-40.0| 18.0-20.0 Providence | | | | | | -------------------+---+---------+---------+-------+----------+---------- The differences in the length of the exposed culmen of these terns shows that birds from islands more remotely oceanic possess longer bills than do those from islands closer to the Asiatic continent. Murphy (1938:538) has written that this phenomenon is characteristic among some species which have both continental and insular populations (or subspecies). Figure 10 shows the southeastern part of the range of the subspecies, _Sterna s. sumatrana_, and gives the average measurements of the exposed culmen of birds from several localities. These localities are given in table 19. Terns with longer bills (37-39) were taken in Micronesia, in the Polynesian islands, and in northern Australia. Terns with shorter bills (34-36) were taken in Melanesia, Malaysia, and the coastal region of China, but there appears to be no abrupt line of demarkation between them. Further evidence of this tendency may be obtained from the literature. Kuroda (1925:191) gives the measurements of the exposed culmen of seven males and five females from the Riu Kius as averaging 35 mm. (range 31-40.5). It is also of interest to note that the length of the exposed culmen of the males averages one to two mm. longer than that of the females. The status of _Sterna sumatrana mathewsi_ may be questioned. I find no characters separating my series of mostly poor specimens. The systematic position of this subspecies from the Indian Ocean (and likewise the status of subspecies of other sea birds which range into the Indian Ocean) may not be known with certainty until additional material is obtained. [Illustration: FIG. 10. Geographic variation in the average length of the exposed culmen of _Sterna sumatrana sumatrana_.] =Sterna lunata= Peale Spectacled Tern _Sterna lunata_ Peale, U. S. Expl. Exped., 8, 1848, p. 277. (Type locality, Vincennes Island, Paumotu Group.) _Sterna lunata_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 831 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 90, 113 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 41 (Palau); Saunders, Cat. Birds British Mus., 25, 1896, p. 100 (Pelew); Takatsukasa and Kuroda, 1, 1915, p. 62 (Ruk, Pelew); Hand-list Japanese Birds, rev., 1932, p. 195 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 218 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 26 (Micronesia). _Onychoprion lunatus_ Salvadori, Ornith. Papuasia, 3, 1882, p. 451 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 76 (Pelew). _Melanosterna lunata_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 52 (Pelew). _Geographic range._--Breeds in Oceania from the Hawaiian Group south to Fiji and the Tuamotus and west to the Moluccas. In Micronesia: Palau Islands--exact locality not known. _Remarks._--Finsch (1875:41) recorded specimens taken by Tetens, Peters and Kubary at the Palau Islands. Coultas obtained one immature male at sea south of the eastern Caroline Islands at 1° 25´ N and 159° E on October 19, 1930. The Spectacled Tern ranges throughout the tropical Pacific, spending considerable time at sea, and probably reaches most parts of Micronesia in its travels. =Sterna anaetheta anaetheta= Scopoli Bridled Tern _Sterna Anaethetus_ Scopoli, Del. Flor. et Faun., Insubr., fasc. 2, 1786, p. 92. (Type locality, "In Guinea" = Panay, Philippine Islands, _ex._ Sonnerat.) _Sterna anaestheta_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Pelew). _Melanosterna anaestheta anaestheta_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 52 (Pelew). _Sterna anaethetus anaethetus_ Hand-list Japanese Birds, rev., 1932, p. 195 (Palau); Yamashina, Tori, 10, 1940, p. 678 (Bikar); Hand-list Japanese Birds, 3d ed., 1942, p. 218 (Palau, Bikar). _Sterna anaetheta anaetheta_ Mayr, Birds Southwest Pacific, 1945, p. 26 (Palau). _Geographic range._--Breeds from Malaysia to Australia and Oceania and north to Formosa. Ranges west to Ceylon and north to Japan. In Micronesia: Palau Islands--exact locality not known; Marshall Islands--Bikar. _Measurements._--Four adult males from the Palau Islands have the following measurements: wing 246-254, longest tail feather 147-177, shortest tail feather 71-72, exposed culmen 40-44, tarsus 21-23; one adult female: wing 266, exposed culmen 40.5, tarsus 22.5. _Specimens examined._--Total number, 7 (4 males, 3 females) from Palau Islands, AMNH--exact locality not given (Dec. 20). _Remarks._--The Bridled Tern is known from the Palau Islands and from Bikar in the Marshall Islands. In Micronesia, the species apparently reaches the northeastern extent of its range. In the Palaus, Coultas found the terns on small outlying islands. He observed them to fly to sea early in the day and to return to the islands in the evening. Of the seven specimens obtained by him, two males and one female had enlarged gonads (Dec. 20). =Sterna fuscata oahuensis= Bloxham Sooty Tern _Sterna Oahuensis_ Bloxham, Voy. "Blonde," 1826, p. 251. (Type locality, Oahu, Hawaiian Islands.) _Sterna fuliginosa_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 39 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); _idem_, Journ. f. Ornith., 1880, p. 295 (Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Ponapé). _Onychoprion fuscata infuscata_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 51 (Ponapé). _Sterna fuscata nibilosa_ Hand-list Japanese Birds, rev., 1932, p. 195 (Ponapé); Yamashina, Tori, 10, 1940, p. 677 (Helen Reef); Hand-list Japanese Birds, 3d ed., 1942, p. 218 (Ponapé, Helen Reef). _Sterna fuscata oahuensis_ Mayr, Birds Southwest Pacific, 1945, p. 25 (Micronesia). _Geographic range._--Breeds from the Hawaiian, Marcus, and Bonin islands south to the Phoenix Islands and Micronesia. In Micronesia: Mariana Islands--Asuncion; Palau Islands--Helen Reef; Caroline Islands--Ponapé. _Specimens examined._--Total number, 1 unsexed from Mariana Islands, AMNH--Asuncion (Jan. 18). _Remarks._--The systematic position of the Sooty Tern in Micronesia is uncertain; in using this name I am following Peters (1934:338), who comments that the species "is badly in need of revision." Coultas obtained one immature female at O° 90´ S and 159° 50´ E, a position south of the eastern Caroline Islands. The bird is tentatively placed in the subspecies _S. f. oahuensis_. The Sooty Tern probably does not breed in large numbers in Micronesia, unless it be in the northern Marianas. Bryan (1903:97) reports that this species is very abundant at Marcus Island, which is north and east of the Marianas. =Sterna albifrons sinensis= Gmelin Least Tern _Sterna sinensis_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 608. (Type locality, China, ex Latham.) _Sterna albifrons_ Marshall, Condor, 51, 1949, p. 221 (Saipan). _Geographic range._--Found on coastal areas from Korea and China south to New Guinea. In Micronesia: Mariana Islands--Saipan. _Specimens examined._--One female from Mariana Islands, USNM--Saipan (Sept. 26). _Remarks._--Marshall (1949:221) took one of two Least Terns at Lake Susupe on Saipan on September 26, 1945. The specimen taken, a female, is in post juvenal molt. =Thalasseus bergii pelecanoides= (King) Crested Tern _Sterna pelecanoides_ King, Surv. Intertrop. and Western Coasts Australia, 2, 1827, p. 422. (Type locality, Torres Strait, northern Queensland.) _Sterna bergii_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 50 (Palau); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); _idem_, Ibis, 1880, pp. 330, 332 (Ratak Chain); _idem_, Journ. f. Ornith., 1880, p. 295 (Ponapé); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, pp. 113, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 299, 330, 353 (Ponapé, Mortlock, Nukuor, Ruk); Salvadori, Ornith. Papuasia, 3, 1882, p. 434 (Ruk, Ponapé, Marshalls); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 51 (Jaluit); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 74 (Pelew, Luganor, Nukuor, Ruk, Ponapé, Marshall Islands); Hartert, Novit. Zool., 7, 1900, p. 10 (Ruk); Saunders, Cat. Birds British Mus., 25, 1896, p. 89 (Ponapé, Marshalls); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Ponapé); Uchida, Annot. Zool. Japon., 9, 1918, pp. 483, 488 (Ponapé). _Sterna bergeri_ Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln). _Sterna bergii cristata_ Stresemann, Novit. Zool., 21, 1914, p. 58 (Truk). _Thalasseus bergii pelecanoides_ Oberholser, Proc. U. S. Nat. Mus., 49, 1915, p. 523 (Marshall Islands); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 51 (Luganor, Nukuor, Ruk, Ponapé, Marshall Islands); Kuroda, Avifauna Riu Kiu, 1925, p. 188 (Marshall Islands); Hand-list Japanese Birds, rev., 1932, p. 194 (Palau, Faraulep, Truk, Lukunor, Nukuoro, Ponapé, Jaluit, Mille, Aurh, Maloelab, Ailuk); Yamashina, Tori, 10, 1940, p. 677 (Helen Reef, Babelthuap); Hand-list Japanese Birds, 3d ed., 1942, p. 218, (Babelthuap, Helen Reef, Faraulep, Truk, Lukunor, Nukuoro, Ponapé, Jaluit, Mille, Aurh, Maloelab, Ailuk). _Thalasseus bergii cristatus_ Peters, Check-list Birds World, 2, 1934, p. 342 (Carolines, Marshalls); Mayr, Birds Southwest Pacific, 1945, p. 26 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 55 (Peleliu, Ngajangel [Kayangel], Truk). _Geographic range._--Malaysia and east coast of Australia south to Tasmania, east to Melanesia and Polynesia, north to Phoenix Islands and Micronesia (see figure 11). In Micronesia: Palau Islands--Helen Reef, Peleliu, Babelthuap; Caroline Islands--Ulithi, Truk, Faraulep, Lukunor, Nukuoro, Ponapé; Marshall Islands--Jaluit, Mille, Aurh, Moloelab, Ailuk, Bikini. _Characters._--Adult: A large, white tern with back, rump, tail, wing-coverts, wing, and axillaries pearl gray; outer edges of primaries pearly grayish-black; crown black with crest; bill greenish-yellow with blackish base; feet black. Crown black, mottled with white and mantle paler in postnuptial plumage. Immature: Resembles adult, but crown and back dark, mottled with white and crest small. _Measurements._--Measurements of Crested Terns of the Pacific area are listed in table 20. _Specimens examined._--Total number, 10 (6 males, 4 females), as follows: Caroline Islands, USNM--Ulithi, 1 (Aug. 21); AMNH--Truk, 2 (May 7, Dec. 5)--Ponapé, 3 (Nov. 1, 7); Marshall Islands, USNM--Bikini, 4 (March 4, 11, 12). _Parasites._--Uchida (1918:483, 488) obtained the following species of bird lice (Mallophaga) from the Crested Tern at Ponapé: _Docophorus albemarlensis_ and _Colpocephalum importunum_. _Remarks._--Oberholser (1915:520-526, pl. 66) lists five subspecies (_T. b. cristatus_, _T. b. halodramus_, _T. b. pelecanoides_, _T. b. rectirostris_, and _T. b. poliocercus_) in the region including the coast of China, the Riu Kiu Islands, Malaysia, Melanesia, eastern Australia, Polynesia, and Micronesia. Only one subspecies, _T. b. cristatus_, is recognized in this area by Stresemann (1914:58), Hartert (1921:1695-1696), and Peters (1934:341-342), who mention that there is much variation in size and coloring. TABLE 20. MEASUREMENTS OF _Thalasseus bergii_ IN THE PACIFIC AREA Column headings: A: No. B: Wing C: Longest tail feather D: Shortest tail feather E: Exposed culmen F: Tarsus =========================+====+=========+=========+=======+=======+====== LOCATION | A | B | C | D | E | F -------------------------+----+---------+---------+-------+-------+------ _Thalasseus bergii pelecanoides_ | | | | Palaus, Carolines, | 6 | 343 | 168 | 82 | 60 | Marshalls | | 334-352 | 153-184 | 80-85 | 58-65 | | | | | | | Christmas, Phoenix, | | | | | | Tuamotus, Society, | 48 | 344 | 170 | 83 | 58 | 27 Fiji, Loyalty, | | 329-362 | 145-198 | 77-92 | 54-64 | 25-29 New Hebrides | | | | | | | | | | | | Eastern Australia | 14 | 345 | 165 | 88 | 58 | 27 | | 338-349 | 152-174 | 84-92 | 55-63 | 26-29 | | | | | | New Guinea, Bismarck, | 18 | 342 | 168 | 81 | 59 | 27 Archipelago, Moluccas| | 332-361 | 144-194 | 75-87 | 53-64 | 26-28 +----+---------+---------+-------+-------+------ Totals | 86 | 344 | 169 | 83 | 58 | 27 | | 329-362 | 144-198 | 75-92 | 53-65 | 25-29 | | | | | | _Thalasseus bergii cristatus_ | | | | | Philippines, China, | 18 | 332 | 162 | 81 | 58 | 28 ormosa, Riu Kius | | 324-342 | 149-182 | 78-87 | 55-64 | 26-30 | | | | | | _Thalasseus bergii gwendolenae_ | | | | Western Australia | 14 | 354 | 171 | 86 | 58 | 27 | | 339-369 | 162-182 | 81-91 | 53-65 | 25-29 -------------------------+----+---------+---------+-------+-------+------ Measurements, as shown in table 20, indicate a wide range of sizes but, in most series, the averages are nearly the same. Nevertheless, it is evident that birds from the coast of China, the Riu Kius, Formosa, and the Philippines have a distinctly shorter wing than birds from the Moluccas, Melanesia, eastern Australia, Polynesia, and Micronesia. Further evidence of this is presented by Kuroda (1925:186) who lists the measurements of the wing of eight Crested Terns from the Riu Kiu Islands as 322 to 340 (average 330). The occurrence of populations with shorter wings has already been pointed out in the work of Oberholser (1915:520-526), who divided the short-winged birds into two subspecies. It seems advisable to recognize but one subspecies, _T. b. cristatus_, for the birds with short wings and another subspecies, _T. b. pelecanoides_, to include the birds with the longer wings (see figure 11). The average measurements of the length of wings of these two subspecies, 332, and 344, differ significantly, although there is some overlap in measurements. A few specimens at hand from the western part of Malaysia are in poor condition and not measurable. [Illustration: FIG. 11. Geographic distribution of _Thalasseus bergii_. (1) _T. b. bergii_; (2) _T. b. thalassinnus_; (3) _T. b. velox_; (4) _T. b. cristatus_; (5) _T. b. gwendolenae_; (6) _T. b. pelecanoides_.] Most specimens of _T. b. cristatus_ and _T. b. pelecanoides_ have lighter-colored upper parts than specimens of _T. b. velox_, but not so light-colored as specimens of _T. b. gwendolenae_. Size probably is a better character than color to use in separating these groups. In Micronesia, the NAMRU2 party observed Crested Terns at Ulithi, Peleliu and Truk, in August, September, and December, 1945, respectively. Birds were seen as singles or in small groups flying over the reefs. The birds were wary and difficult to approach, but they were conspicuous and easily identified. =Procelsterna cerulea saxatilis= W. K. Fisher Blue-gray Tern _Procelsterna saxatilis_ W. K. Fisher, Proc. U. S. Nat. Mus., 26, 1903, p. 559. (Type locality, Necker Island, Hawaiian Islands.) _Procelsterna cerulea saxatilis_ Yamashina, Tori, 10, 1940, p. 678 (Bikar); Hand-list Japanese Birds, 3d ed., 1942, p. 219 (Bikar); Mayr, Birds Southwest Pacific, 1945, p. 27 (Micronesia). _Geographic range._--Known from Marcus Island and the western Hawaiian Islands. In Micronesia: Marshall Islands--Bikar. _Remarks._--Yamashina (1940:678) recorded the taking of eight of these terns (5 adult males, 3 adult females) on July 10, 1932, at Bikar in the Marshall Islands. He gives the following measurements: wing, 180.5-188; tail, 104-113.5; exposed culmen, 24-26.5. This is the only known record for the species in Micronesia. =Anous stolidus pileatus= (Scopoli) Common Noddy _Sterna pileata_ Scopoli, Del. Flor. et Faun. Insubr., fasc. 2, 1786, p. 92. (No type locality = Philippines, _ex._ Sonnerat.) _Sterna stolida_ Chamisso, in Kotzebue's Voy. "Rurick," 3, 1821, pp. 150, 157 (Marshall Islands); Kittlitz, Kupfertaf. Naturgesch. Vögel, 3, 1833, p. 27, pl. 36, fig. 1 (Mordloks-Inseln); _idem_, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 286, 299, 308, 309 (Ualan, Lougounor, Ouleai); _idem_, Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, p. 364, 2, pp. 77, 86 (Ualan); Wiglesworth, Ibis, 1893, p. 212 (Marshalls). _Anous stolidus_ Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 137 (Mortlock); _idem_, Journ. f. Ornith., 1854, p. 168 (Carolinen); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 59 (Carolines); Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 236 (Mordlocks, Puynipet = Ponapé); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 90, 112 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 6, 42 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 40 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 295, 307 (Ponapé, Ruck, Kuschai); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk, Ponapé, Kuschai); _idem_, Ibis, 1881, pp. 105, 109, 115, 246, 247 (Kuschai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 299, 330, 353 (Mortlock, Nukuor, Ruk); Salvadori, Ornith. Papuasia, 3, 1882, p. 455 (Pelews, Carolines, Marshalls); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 51 (Jaluit, Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 76 (Pelew, Mortlock, Ruk, Nukuor, Ponapé, Ualan, Marshalls); Saunders, Cat. Birds British Museum, 25, 1896, p. 136 (Pelew, Carolines, Marshalls); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 59 (Saypan, Guam, Rota, Agrigan, Hogoleu = Truk, Kushai, Ponapi, Marshalls); Hartert, Novit. Zool., 5, 1898, p. 68 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 21 (Guam); Safford, Osprey, 1902, p. 66 (Mariannas); Bryan, Occ. Papers Bernice P. Bishop Mus., 2, 1903, p. 101 (Guam); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marshall-Inseln); Safford, The Plant World, 7, 1904, p. 267 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Prowazek, Die deutschen Marianen, 1913, p. 100 (Marianen); Takastukasa and Kuroda, Tori, 1, 1915, p. 51 (Ponapé, Ruk); Cox, Island of Guam, 1917, p. 22 (Guam); Uchida, Annot. Zool. Japon., 9, 1918, pp. 484, 488 (Palau, Ponapé); Wharton, Ecol. Monogr., 16, 1946, p. 174 (Guam); Wharton and Hardcastle, Journ. Parasitology, 32, 1946, pp. 292, 296, 306 (Guam, Ulithi). _Anous pileatus_ Pelzeln, Reise "Novara," Vögel, 1865, pp. 155, 162 (Puynipet = Ponapé). _Anous stolidus pileatus_ Hartert, Novit. Zool., 7, 1900, p. 9 (Ruk); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 183 (Kusaie); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 49 (Guam, Saipan, Pelew, Mortlock, Ruk, Wolea, Nukuoro, Ponapé, Kusaie, Marshalls); Hand-list Japanese Birds, rev., 1932, p. 195 (Koror, Urukthapel, Angaur, Saipan, Guam, Wolea, Truk, Mortlock, Lukunor, Nukuoro, Ponapé, Kusaie, Jaluit, Mille, Aurh, Wotze); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Yamashina, Tori, 10, 1940, p. 678 (Assongsong, Babelthuap); Hand-list Japanese Birds, 3d ed., 1942, p. 219 (Saipan, Assongsong, Guam, Babelthuap, Koror, Urukthapel, Peliliu, Angaur, Wolea, Truk, Mortlock, Lukunor, Nukuoro, Ponapé, Kusaie, Taluit, Mille, Aurh, Wotze); Borror, Auk, 1947, p. 417 (Agrihan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 56 (Rota, Guam, Peleliu, Ngabad, Ulithi, Truk). _Anous stolidus unicolor?_ Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 547 (Guam). TABLE 21. MEASUREMENTS OF _Anoüs stolidus_ OF THE PACIFIC AREA ======================================+=====+=========+=========+======== | | | | Exposed LOCATION | No. | Wing | Tail | culmen --------------------------------------+-----+---------+---------+-------- _Anoüs stolidus ridgwayi_ | 18 | 278 | 158 | 41 Isabella, Cocos, Clipperton Islands | | 260-295 | 147-166 | 38-42 | | | | _Anoüs stolidus galapagensis_ | 11 | 277 | 151 | 40 Galapagos Islands | | 274-282 | 142-160 | 38-42 | | | | _Anoüs stolidus pileatus_ | 35 | 281 | 162 | 42 Hawaiian Islands: Nihoa to Midway | | 268-299 | 149-176 | 38-40 | | | | Wake Islands | 8 | 278 | 159 | 41 | | 273-285 | 152-170 | 39-43 | | | | Mariana Islands: Guam, Rota | 12 | 280 | 167 | 41 | | 275-288 | 159-187 | 39-43 | | | | Palau Islands | 9 | 278 | 161 | 41 | | 268-283 | 155-166 | 39-42 | | | | Caroline Islands | 41 | 282 | 164 | 42 | | 270-291 | 150-173 | 39-45 | | | | Marshall Islands | 3 | 282 | 164 | 42 | | 270-289 | 154-174 | 41-43 | | | | Ellice, Phoenix, Danger, Suvarov | 27 | 284 | 162 | 41 Islands | | 265-295 | 152-174 | 39-44 | | | | Christmas Island | 13 | 287 | 162 | 43 | | 280-292 | 152-174 | 40-46 | | | | Marquesas Islands | 19 | 282 | 163 | 42 | | 275-291 | 155-170 | 40-43 | | | | Tuamotu Archipelago | 38 | 287 | 165 | 42 | | 277-299 | 154-173 | 39-46 | | | | Society, Austral, Cook, Rapa | 16 | 290 | 290 | 43 Islands | | 280-301 | 155-173 | 40-45 | | | | Oeno, Henderson, Ducie, Easter | 6 | 293 | 164 | 44 Islands | | 154-175 | 154-175 | 41-45 | | | | Samoa, Fiji, Tonga | 19 | 285 | 164 | 42 | | 153-173 | 153-173 | 39-44 | | | | Kermadecs, Norfolk | 23 | 276 | 158 | 41 | | 269-289 | 148-173 | 38-43 | | | | New Hebrides, Solomons, New Guinea | 31 | 278 | 158 | 41 area | | 265-287 | 150-172 | 3 -44 | | | | Northwest Australia | 9 | 263 | 145 | 40 | | 258-267 | 138-152 | 38-42 | | | | South China Sea area, Strait of | 4 | 271 | 153 | 39 Malacca | | 262-278 | 148-257 | 37-40 | | | | Riu Kius, Japan | 5 | 268 | 148 | 39 | | 259-275 | 143-155 | 37-40 | | | | Indian Ocean area: Seychelles, | 20 | 276 | 154 | 41 Aldebra, Providence, Somaliland | | 270-286 | 146-164 | 39-42 --------------------------------------+-----+---------+---------+-------- _Geographic range._--Islands in the Indian Ocean east to tropical parts of western and central Pacific. In Micronesia: Mariana Islands--Agrihan, Asuncion, Saipan, Rota, Guam; Palau Islands--Kayangel, Babelthuap, Koror, Urukthapel, Ngabad, Peleliu, Angaur; Caroline Islands--Ulithi, Truk, Wolea, Mortlock, Lukunor, Nukuoro, Ponapé, Kusaie; Marshall Islands--Jaluit, Mille, Aurh, Wotze, Bikini, Kwajalein. _Characters._--Adult: A large, dark-brown tern with grayish crown and whitish forehead; line above eye white; crescent of white on lower eyelid; lores blackish; bill black; feet brownish, iris dark. Immature: Resembles adult, but lighter and browner and top of head grayish-brown. _A. s. pileatus_ resembles _A. s. ridgwayi_, but darker and less brownish, although not so dark as _A. s. galapagensis_; forehead and crown usually duller; length of wing and tail average larger (282 and 161) than in _A. s. ridgwayi_ (278 and 158) and _A. s. galapagensis_ (277 and 151). _Measurements._--Measurements of the Common Noddy of the Pacific area are listed in table 21. _Weights._--In 1948 (1948:56) I listed the weights of specimens from Guam and Rota as follows: four adult males 187-204 (197); three adult females 177-203 (189). _Specimens examined._--Total number, 92 (43 males, 39 females, 10 unsexed), as follows: Mariana Islands, USNM--Guam, 7 (May 24, June 15, July 6, 21)--Rota, 3 (Oct. 18, 24); AMNH--Guam, 4 (April 21, 27, Aug. 18)--Asuncion, 1 (Jan. 18); Palau Islands, USNM--Peleliu, 2 (Sept. 1)--Ngabad, 1 (Sept. 11); AMNH--exact locality not given, 6 (Nov. 3, 8); Caroline Islands, USNM--Ulithi, 3 (Aug. 15)--Kusaie, 1 (Feb. 8); AMNH--Truk, 15 (Feb. 1, 8, 25, March 10, May 6, June 12, 13, Nov. 25, Dec. 25)--Ponapé, 20 (Dec. 3, 5, 8, 12, 15)--Kusaie, 24 (Jan., March 10-30, April 1-10); Marshall Islands, USNM--Bikini, 5 (Feb. 28, March 2, 19). _Nesting._--Murphy (1936:1152) writes that the Atlantic subspecies, _A. s. stolidus_, breeds in tropical localities every month of the year, although there may be a part of the resident population away at sea at any given time. In the Pacific area, Kirby (1925:187) found nests "on platforms of sticks built on tufts of grass" at Christmas Island in August. In Micronesia, Coultas obtained young birds at Kusaie in January and April and commented (field notes) that they probably nest "spasmodically at all times of the year." At Ponapé, Coultas observed nests in high trees in December, and birds obtained by him in that month had enlarged gonads. At Bikini, Morrison obtained eggs on March 2 and 19, and young on March 19. At Palau, Coultas took one female tern in postnatal molt on November 8. Adults obtained by him in that month had enlarged gonads. At Ulithi, the NAMRU2 party recorded one nest containing a single egg on August 21. At the same atoll the NAMRU2 party received reports of a large colony of nesting noddys in May to July, 1945. In the following August few noddies were seen by the NAMRU2 party. McElroy found nests on cliffs and in coconut trees at Truk in December, 1945. Hartert (1900:10) reports on eggs taken at Truk in the period from March to July 1. The NAMRU2 party observed birds carrying nest materials at Peleliu on August 28 but failed to find the nests. At Guam, the writer found terns in numbers varying from 4 to 75 in May to July, 1945, along the rocky cliffs but no evidence of nesting activity was obtained. Strophlet (1946:537) reports that nests may have been present on Orote Peninsula at Guam on December 13, 1945. Coultas (field notes) is of the opinion that the birds do not nest at Guam but do nest farther north in the Marianas. Borror (1947:417) found two colonies at Agrihan on August 10, 1945. Thus, there are records of nesting in nine months of the year in Micronesia; although I suspect that the larger flocks of terns have more regular breeding habits correlated with their pelagic feeding activities. "Stragglers" probably nest irregularly. _Food habits._--The author (1948:56) records small fish and crustaceans in stomachs of terns taken at Ulithi and Peleliu. At Ypao Point, Guam, birds were seen to fly back and forth in the day from their roosts on the sea-cliffs. On one occasion I saw these birds feeding approximately a half mile from shore. _Parasites._--Wharton (1946:174) and Wharton and Hardcastle (1946:292, 296, 306) list the following species of chiggers (Acarina) from the Common Noddy from Guam and Ulithi: _Neoschöngastia bougainvillensis_, _N. americana solomonis_, _N. egretta_, _Acariscus pluvius_, and _A. anous_. Uchida (1918:484, 488) found the bird louse (Mallophaga), _Nirmus separatus_, on terms at Palau and at Ponapé he found _Colpocephalum milleri_ on the bird. Bequaert (_in litt._) has identified a fly (Hippoboscidae) as _Olfersia aenescens_ from a tern from Rota. _Remarks._--Of the Common Noddy Tern of the Pacific area, three subspecies are recognized by Peters (1934:346-347). _Anoüs stolidus ridgwayi_ is known from islands off the western coast of Mexico and Central America; _A. s. galapagensis_ is recorded from the Galapagos Archipelago; and _A. s. pileatus_ is found on tropical islands throughout the Pacific and west to Madagascar and the African coast in the Indian Ocean. These subspecies differ from one another principally in color, as noted by Ridgway (1919:545); _A. s. galapagensis_ is the darkest form, _A. s. ridgwayi_ is less blackish and more brownish in color of body, and _A. s. pileatus_ is between the two in coloring. _A. s. pileatus_ averages larger in length of wing and tail, but these measurements do not appear to be significant from a taxonomic standpoint. As shown in table 21, measurements of length of wing for specimens from throughout most of the Pacific area are almost the same. Length of tail is correspondingly uniform. There is a gradual increase in size of birds in the Tuamotus and Societies and east to Easter Island. In this region the average measurement for length of wing is 293 millimeters. The lengths of wing and tails are shorter in specimens from the Kermadecs and Norfolk Island, which may indicate relationships with the smaller birds of the Australian area, Western Melanesia and possibly Malaysia and the Riu Kiu Islands. I am unable to determine the subspecific status of the birds from the Kermadecs and Norfolk Island, because of the lack of sufficient material from the Australian region and Malaysia. Possibly Mathews' name, _A. s. gilberti_, is valid for the noddys of Australia and also for the birds at Norfolk and the Kermadecs. The small-sized birds of the Riu Kiu Islands have been designated as _A. s. pullus_ by Bangs. When specimens from the type locality of _A. s. pileatus_ in the Philippine Islands are available, the true relationships of the populations from Micronesia and the other areas in the Pacific can be ascertained. The tern found in the Hawaiians has the palest body and the most chalky-white forehead of any of the birds of the Pacific. Bryan (1903:101) found terns from Marcus Island to agree with specimens from Guam and to be "slightly darker" than birds from Midway and Laysan in the Hawaiian chain. The birds from the Riu Kius are darker and thus similar to the few specimens seen from Malaysia. Birds from Polynesia and Melanesia possess the most sooty underparts while those from Micronesia are only slightly less pale. This condition also seems to be true for the birds in the Australian area and for specimens seen from islands in the Indian Ocean. With fading, or wear, or both, there is a change from dusky black to dusky brown in the plumage; effort was made by me to compare specimens with relatively similar conditions of plumage. In summary, the systematic position of the Common Noddy Terns of the Pacific seemingly depends on the characteristics of specimens from the type locality in the Philippines. When topotypes are available for study, they may be found to be nearer the darker forms of Malaysia or may tend toward the paler, oceanic forms. The Hawaiian population probably is distinct. In Micronesia the Common Noddy Tern is not a conspicuous bird except during its breeding period. Probably it spends most of its life at sea, being unlike _Gygis alba_ in this respect. Large flocks seem less wary of man than are small groups and singles, which are often easily disturbed. Birds of this species appear to prefer the low atolls and offshore islets where both tall vegetation and bare ground are utilized for nesting or roosting. At Ponapé, Coultas (field notes) observed the birds to fly to sea at daybreak and to begin to return to their roosts by 4:00 pm. Wallace (field notes) observed similar activities at Kwajalein in May, 1944, where he saw approximately forty individuals in a flock with _Gygis alba_. _Anoüs stolidus_ is divided naturally into an Atlantic subspecies, which is distinguished by its browner color, and into several subspecies which are distinguished by their blacker color in the Pacific and Indian oceans. Whether the genus and species evolved in the Atlantic or in the Pacific region is not known. If it were the Pacific region, the center of differentiation may very well have been the islands of Oceania. There, relatively little variation is observable within populations covering a large area. To the eastward, birds along the American coast are darker or lighter, to the northward, the birds of Hawaii are paler, to the southward and southwestward, the birds are smaller and to the westward, the birds are smaller and darker. The virtual absence of ground-living, predatory animals which might prey on nesting colonies has probably been a reason for the lack of discrimination by this tern in selecting breeding sites. This is probably true of other birds which nest in colonies. =Anous tenuirostris marcusi= (Bryan) White-capped Noddy _Micranous marcusi_ Bryan, Occ. Papers Bernice P. Bishop Mus., 2, 1903, p. 101. (Type locality, Marcus Island.) _Sterna tenuirostris_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 286, 308 (Ualan, Ouleai); _idem_, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 64 (Ualan). _Anous tenuirostris_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 113 (Pelew, Carolines); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 6, 42 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 299, 330 (Mortlock, Nukuor); Stott, Auk, 64, 1947, p. 526 (Saipan). _Anous melanogenys_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Palau); _idem_, Journ. f. Ornith., 1880, pp. 295, 308 (Ponapé, Kuschai); _idem_, Ibis, 1880, pp. 219, 220, 332 (Taluit, Arno); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, pp. 107, 109, 115 (Kuschai, Ponape); Salvadori, Ornith. Papuasia, 3, 1882, p. 456 (Pelew, Ponapé, Marshalls); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 52 (Jaluit, Arno, Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1901 (1891), p. 77 (Pelew, Ualan, Ponapé, Nukuor, Luganor, Ruk); Hartert, Katalog Vogelsamml. Senckenb., 1891, p. 238 (Ualan); Takatsukasa and Kuroda, Tori, 1, 1915, p. 62 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 50 (Pelew, Ruk, Wolea, Luganor, Nukuor, Ponapé, Kusaie, Marshalls). _Anous leucocapillus_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 781 (Ponapé); Nehrkorn, Journ. f. Ornith., 1879, p. 410 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 52 (Jaluit); Tristram, Cat. Coll. Birds, 1889, p. 10 (Pelew); Salvadori, Ornith. Papuasia, 3, 1882, p. 457 (Pelew); Wiglesworth, Abhandl. und Ber Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 77 (Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 60 (Saypan, Palaos, Ruk, Luganor, Nukuor, Ponapé, Kuschai, Bonham); Hartert, Novit. Zool., 5, 1898, p. 68 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 20 (Saipan?); Safford, Osprey, 1902, p. 66 (Marianas); _idem_, The Plant World, 7, 1904, p. 267 (Guam); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Cox, Island of Guam, 1917, p. 22 (Guam). _Micranous leucocapillus_ Saunders, Cat. Birds British Mus., 25, 1896, p. 145 (Pelew, Caroline Islands); Nehrkorn, Kat. Eiers., 1899, p. 222 (Kusai); Hartert, Novit. Zool., 7, 1900, p. 9 (Ruk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 51 (Pelew). _Megalopterus minutus marcusi_ Mathews, Birds Australia, 2, 1912, p. 423 (Marianas?); Ridgway, Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 553 (Mariannes?); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 146 (Mariannes); Hachisuka, Birds Philippines, 2, 1932, p. 343 (Mariannes). _Megalopterus tenuirostris leucocapillus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 50 (Saipan, Pelew, Ruk, Ponapé, Kusaie). _Megalopterus minutus minutus_ Fisher and Wetmore, Proc. U. S. Nat. Mus., 79, 1931, p. 45 (Caroline Islands). _Anous minutus worcesteri_ Yamashina, Tori, 7, 1932, p. 409 (Coror, Namo, Iringlab); Hand-list Japanese Birds, rev., 1932, p. 195 (Saipan, Babelthuap, Koror, Truk, Ponapé, Kusaie, Ebon, Namorik, Jaluit, Elmore, Mille, Aurh, Wotze, Ailuk); Yamashina, Tori, 10, 1940, p. 678 (Assongsong, Saipan); Hand-list Japanese Birds, 3d ed., 1942, p. 219 (Assongsong, Saipan, Babelthuap, Koror, Peliliu, Truk, Ponapé, Kusaie, Ebon, Namorik, Jaluit, Elmore, Mille, Aurh, Wotze, Ailuk). _Anous minutus marcusi_ Peters, Check-list Birds World, 2, 1934, p. 347 (Caroline Islands). _Anous minutus_ Bequaert, Mushi, 12, 1939, p. 82 (Ponapé); _idem_, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 253 (Ponapé, Palau). _Anous tenuirostris marcusi_ Mayr, Birds Southwest Pacific, 1945, p. 27 (Micronesia); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 56 (Peleliu, Ulithi, Truk). _Geographic range._--Marcus, Wake, and Micronesia. In Micronesia: Mariana Islands--Asuncion, Saipan, Guam?; Palau Islands--Babelthuap, Koror, Peleliu; Caroline Islands--Ulithi, Truk, Ponapé, Luganor, Nukuor, Wolea; Marshall Islands--Ebon, Namorik, Jaluit, Elmore, Mille, Aurh, Wotze, Ailuk. _Characters._--Adult: A small tern with sooty-black plumage, grayer on rump and tail; forehead and crown white becoming grayer on nape to merge with blackish on shoulder; narrow, black superciliary stripe; lores black, lower eyelid with white streak, upper eyelid with white spot. Resembles _A. t. melanogenys_ but wing and tail longer and superciliary stripe narrower. Resembles _A. t. minutus_ but with narrower, black superciliary stripe. Immature: Resembles adult, but crown more whitish, this coloration ending abruptly at nape, with mottling in some birds; plumage of body with brownish wash. _Measurements._--Measurements are listed in table 22. _Specimens examined._--Total number, 51 (27 males, 22 females, 2 unsexed), as follows: Mariana Islands, AMNH--Asuncion, 1 (Jan. 18); Palau Islands, USNM--Peleliu, 2 (Sept. 9, 12); AMNH--exact locality not given, 2 (Nov. 3); Caroline Islands, USNM--Ulithi, 4 (Aug. 20); AMNH--Truk, 5 (Nov. 16, 21, 22)--Ponapé, 15 (Dec. 15)--Kusaie, 17 (Jan. 10, March 10-30, April 1-10); Marshall Islands, USNM--Bikini, 4 (May 2, 14); AMNH--no locality given, 1 (Sept. 3). TABLE 22. MEASUREMENTS OF _Anoüs tenuirostris_ OF THE PACIFIC AREA =======================================+=====+=========+=========+======= | | | |Exposed LOCATION | No. | Wing | Tail |culmen ---------------------------------------+-----+---------+---------+------- _Anoüs tenuirostris melanogenys_ | | | | Hawaiian Islands | 29 | 222 | 113 | 41 | | 210-229 | 105-120 | 41-48 | | | | _Anoüs tenuirostris marcusi_ | | | | Wake Islands | 8 | 227 | 118 | 45 | | 218-231 | 112-124 | 44-48 | | | | Mariana Islands | 1 | 223 | 117 | 44 | | | | Palau Islands | 3 | 228 | 122 | 43 | | 227-228 | 117-126 | 41-45 | | | | Caroline Islands | 32 | 229 | 120 | 44 | | 220-240 | 113-127 | 40-47 | | | | Marshall Islands | 5 | 224 | 118 | 44 | | 222-229 | 114-123 | 41-46 | | | | _Anoüs tenuirostris minutus_ | 13 | 227 | 120 | 44 Christmas Island | | 220-234 | 108-128 | 41-46 | | | | Phoenix, Howland, Union, Danger, | 9 | 229 | 119 | 46 Suvarov Islands | | 226-233 | 113-124 | 42-48 | | | | Marquesas Islands | 10 | 226 | 117 | 45 | | 220-233 | 115-124 | 42-48 | | | | Tuamotu Archipelago | 17 | 229 | 118 | 45 | | 222-234 | 112-126 | 42-47 | | | | Society, Cook, Austral Islands | 12 | 230 | 118 | 46 | | 223-238 | 114-120 | 43-47 | | | | Samoa, Fiji, Tonga Islands | 6 | 228 | 118 | 44 | | 224-231 | 115-121 | 42-47 | | | | Kermadec, Norfolk Isl'ds, New Zealand| 15 | 226 | 116 | 44 | | 219-235 | 112-121 | 42-47 | | | | New Hebrides, Solomon, Bismarck, | 34 | 229 | 117 | 43 Admiralty Islands, New Guinea | | 222-237 | 109-130 | 40-46 | | | | _Anoüs tenuirostris diamesus_ | | | | Clipperton, Cocos Islands | 14 | 230 | 120 | 44 | | 224-237 | 114-127 | 41-47 ---------------------------------------+-----+---------+---------+------- _Nesting._--Few reports have been obtained concerning the nesting of the White-capped Noddy in Micronesia. Finsch (1881b:107) recorded nests, and Nehrkorn (1899:222) reported on eggs taken at Kusaie. Yamashina (1932a:409) recorded the taking of eggs at Koror in the Palau Islands on January 19 and November 10 and in the Marshalls at Namo on October 19, and at Iringlab on October 21. No evidence of nestings was obtained by the NAMRU2 party in 1945, although a number of birds were seen at Ulithi in August. Coultas (field notes) writes that a colony of approximately 20 birds began nesting about Christmas time on a small offshore island near Ponapé. Nests were placed in the crotches of limbs of mangroves, 8 to 15 feet above the ground. _Food habits._--The NAMRU2 party found small fish in the stomachs of terns taken at Ulithi and Peleliu. _Parasites._--Bequaert (1939:82 and 1941:253) records the fly (Hippoboscidae), _Alfersia aenescens_, from the White-capped Noddy taken at Ponapé and Palau. _Remarks._--The subspecies of _Anoüs tenuirostris_ are well differentiated by color and to a lesser extent by measurements. Table 22 lists measurements which show that the Hawaiian subspecies, _A. t. melanogenys_, has the shortest wing and the shortest tail whereas the subspecies from Cocos and Clipperton islands, _A. t. diamesus_, has the longest wing and the longest tail. The exposed culmen varies in length but little among the four subspecies. The systematic position of _A. t. worcesteri_ from Cavilli Island in the Sula Sea has not been determined because of lack of material. In the third edition of the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:219) the birds from Micronesia are referred to _A. t. worcesteri_ as they are also in other recent publications by the Japanese. Specimens from the Philippines are needed for examination to determine satisfactorily the subspecies status of the birds under consideration. Field observations indicate that the White-capped Noddy is not abundant in the Mariana Islands. According to Oustalet (1896:60), Marche obtained a female at Saipan in June, 1888, and Yamashina (1940:678) records five adults from Assongsong (Asuncion). Owston's collectors obtained a specimen at Asuncion on January 18, 1904. In the Palaus, Carolines, and Marshalls birds of this species are numerous and have been observed or collected at many of the islands. Coultas with the Whitney South Sea Expedition obtained specimens at Kusaie, Ponapé and Palau. He found them along the shores of the large islands and, especially, on the smaller offshore islets. At Ulithi Atoll in August, 1945, the NAMRU2 party observed small flocks of four to ten individuals flying offshore and feeding inside the reef. They were frequently observed in company with _Sterna sumatrana_. Fewer birds were seen in September, 1945, at the Palau Islands by the NAMRU2 party. =Gygis alba candida= (Gmelin) White Tern _Sterna candida_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 607. (Type locality, Christmas Island.) _Gygis candida_ Finsch, Ibis, 1880, p. 220 (Taluit); Saunders (part), Cat. Birds British Mus., 25, 1896, p. 149 (Marshalls); Schnee, Zool. Jahrbücher, 20, 1904, p. 390 (Marschall-Inseln). _Gygis alba_ Finsch, Ibis, 1880, pp. 330, 332 (Taluit); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 78 (Marshalls); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 58 (Saypan, Pagan, Agrigan, Marshalls); Safford, Guam, 1912, p. 19 (Guam); Strophlet, Auk, 63, 1946, p. 537 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam); Stott, Auk, 64, 1947, p. 525 (Saipan); Baker (part), Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 57 (Guam, Rota, Saipan). _Gygis alba kittlitzi_ Hartert, Novit. Zool., 5, 1898, p. 67 (Saipan, Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 21 (Guam); Safford, Osprey, 1902, 66 (Marianas); _idem_, The Plant World, 7, 1904, p. 267 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 80 (Guam); Mathews (part), Birds Australia, 2, 1912, p. 443 (Marianas); Prowazek, Die deutschen Marianen, 1913, p. 100 (Marianan); Cox, Island of Guam, 1917, p. 22 (Guam); Ridgway (part), Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 559 (Mariannes); Kuroda, Avifauna Riu Kiu, 1925, p. 193 (?Mariannes); Yamashina, Tori, 7, 1931, p. 410 (Saipan); Yamashina, Tori, 7, 1932, p. 409 (Iringlab, Namo, Aruno); Hand-list Japanese Birds (part), rev., 1932, p. 196 (Guam, Tinian, Saipan, Pagan, Agrigan, Jaluit, Mille, Aurh, Wotze, Likieb, Mejit); Yamashina (part), Tori, 10, 1940, p. 678 (Assongsong). _Gygys alba_ Wheeler, Report Island of Guam, 1900, p. 13 (Guam). _Gygis albus kittlitzi_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 50 (Guam, Saipan, Pagan, Agrigan, Marshalls). _Leucanous albus kittlitzi_ Mathews (part), Syst. Avium Australasianarum, 1, 1927, p. 143 (Marianne). _Gygis alba microrhyncha_ La Touche (part), Handbook Birds Eastern China, 2, 1933, p. 335 (Marianne). _Gygis alba candida_ Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Hand-list Japanese Birds (part), 3d ed., 1942, p. 219 (Guam, Tinian, Saipan, Pagan, Agrigan, Assongsong, Jaluit, Mille, Aurh, Wotze, Likieb, Mejit); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 94 (Tinian); Borror, Auk, 64, 1947, p. 417 (Agrihan). _Geographic range._--Northern Pacific from Bonins and Marianas east to Wake and Hawaiian Chain, south to Marshall, Phoenix, Christmas and Fanning islands (see figure 12). In Micronesia: Mariana Islands--Guam, Rota, Tinian, Saipan, Pagan, Agrihan; Marshall Islands--Jaluit, Mille, Aurh, Wotze, Likieb, Mejit, Eniwetok, Bikini, Kwajalein. _Characters._--Adult: A small tern with ivory-white plumage except for black, narrow, orbital ring; shafts of primary quills dark brown; shafts of tail feathers blackish; bill black with bluish base; tarsus dark bluish with yellowish webs; iris and skin black. Immature: Resembles adult, but with light brown mottlings on upper parts, especially on the mantle; feathers softer, bill shorter. _Measurements._--Measurements are listed on table 23. _Weights._--The NAMRU2 party obtained weights of 11 adult males from Guam and Rota as 110 (97-124); weights of 6 adult females from Guam as 108 (100-116). These specimens were taken from May to October, 1945. _Specimens examined._--Total number, 41 (23 males, 14 females, 4 unsexed), as follows: Mariana Islands, USNM--Guam, 20 (May 24, 29, June 6, 8, 14, 15, 16, 18, 23, July 10, 19, 20)--Rota, 2 (Oct. 19, 27)--Saipan, 1 (Sept. 26); AMNH--Guam, 4 (March 7, 9, 20)--Tinian, 1 (Sept. 8)--Asuncion, 4 (Jan. 1, 18, 25); MCZ--Saipan, 3 (Jan. 7, March 20, April 17); Marshall Islands, USNM--Bikini, 6 (Feb. 27, March 2, 16, 19). _Nesting._--_Gygis alba_ does not construct a nest but places its single egg rather precariously in the crotch of a branch in a tree (or on rock). In Micronesia nesting activities have been observed at various times of the year. Yamashina (1932a:409, 410) reported on eggs taken in the Marianas at Saipan on February 2 and in the Marshalls at Arhno on September 26, at Iringlab on October 21 and at Namo on October 19. At Guam a pair of White Terns was seen in a large tree on March 27, 1945, by the NAMRU2 observers. Because of their behavior, it was suspected that they had an egg or young in the tree. Further inspection revealed, on March 31, a downy young sitting in the tree. The young bird was attended by the parents until it began to fly on April 17. Hartert (1898:68) reports that eggs of the White Tern were taken at Saipan on July 28 and August 11. Morrison obtained a male nestling on March 16 and eggs on March 22 at Bikini in 1946. _Remarks._--The White Tern is usually restricted to the remote islands in the Pacific, Indian and South Atlantic oceans; there, according to the latest treatment, which is that of Peters (1934:348, 349), six subspecies are recognized. In studying the geographical variation of the species, the writer has examined 595 adult specimens, including previously unstudied material collected by the Whitney South Sea Expedition, which is deposited in the American Museum of Natural History. This ivory-white species presents an unusual problem in that there are few characters available to distinguish the subspecies. Measurements of taxonomic value include those of the wing, tail, exposed culmen, and depth and the shape of the culmen. There appears to be no significant secondary sexual difference between males and females, and measurements of the two sexes are combined. The chief problem within this species seems to hinge on how to classify isolated, but relatively similar, populations. The examination of the large series of specimens from the Whitney collections has yielded more complete information to assist in the solution of this problem. _Gygis alba alba_ (Sparrman) of the South Atlantic Ocean (Fernando de Noronha, South Trinidad, Ascension, and St. Helena islands) and _G. a. monte_ Mathews of the Indian Ocean (Seychelles, Aldabra, Mascarene and Chagos islands) are isolated populations. Specimens examined are those which have previously been studied by other workers; measurements are shown in table 23. With the exception of _G. a. microrhyncha_, _G. a. monte_ has the smallest average length of wing of all of the subspecies of _G. alba_. In _G. a. alba_ the length of wing as well as most of the other measurements differ but slightly from those of some of the populations in the Pacific area although the slender bill of the Atlantic bird is a distinctive character, as pointed out by Murphy (1936:1166). TABLE 23. MEASUREMENTS OF SUBSPECIES OF _Gygis alba_ FROM THE ATLANTIC AND INDIAN OCEAN AREA Column headings: A: No. B: Wing C: Longest tail feather D: Shortest tail feather E: Exposed culmen F: Depth culmen G: Tarsus ===================+====+=======+======+=====+=====+=======+========= SUBSPECIES | A | B | C | D | E | F | G -------------------+----+-------+------+-----+-----+-------+--------- _Gygis alba alba_ | 24 | 246 | 99 | 71 | 40 | 8.0 | 14.5 | |239-256|93-111|68-77|35-44|7.5-9.0|13.0-16.5 | | | | | | | _Gygis alba monte_ | 35 | 232 | 106 | 71 | 39 | 8.5 | 13.5 | |224-244|98-116|64-81|37-44|8.0-8.5|12.5-14.0 -------------------+----+-------+------+-----+-----+-------+--------- The taxonomic position of the White Terns of the Pacific area has been one of uncertainty for a long time; as Peters (1934:349) puts it, "It is obvious that the last word on the Pacific races of Gygis has not yet been said." A principal feature of the problem in this region is the presence in the Marquesas of a well-marked subspecies, _G. a. microrhyncha_, virtually surrounded by a wide-ranging and relatively undifferentiated form, _G. a. pacifica_ (Lesson) (see figure 12). The small cormorant (_Phalacrocorax melanoleucus brevicauda_ Mayr) from Rennell Island, Solomons, is another example of a distinct form surrounded by a widely distributed subspecies. In all, 55 adult specimens of _G. a. microrhyncha_ have been examined from the following islands in the Marquesas Group: Mukahiva, Eiau, Motane, Hivaoa, Uapu, Tahuata, Uahuka, Fatuhiva. The measurements are listed in table 24, and show that the White Tern in the Marquesas is a much smaller bird than the other subspecies and has a shorter bill, wing, and tail. The tail possesses a shallow fork as compared with the deeper fork of the tail of other subspecies. In addition, the depth of the culmen averages two millimeters less in the subspecies in the Marquesas. The presence of a wider, black eye-ring is also a distinguishing character in this subspecies. _Gygis a. microryhncha_ was for a long time treated as a species distinct from _G. alba_ but has recently been considered as a subspecies _G. alba_ by Peters and others. On the islands of Hatutu and Motane in the Marquesas, the Whitney South Sea Expedition obtained some birds which appear to be intergrades between the two subspecies of White Terns in the area. The measurements of nine birds which show intergradation between _G. a. microrhyncha_ and _G. a. pacifica_ are listed in table 24. Probably the Marquesas population is tending toward complete reproductive isolation. [Illustration: FIG. 12. Geographic distribution of _Gygis alba_ in the Pacific area. (1) _G. a. candida_; (2) _G. a. pacifica;_ (3) _G. a. microrhyncha;_ (4) _G. a. royana_.] Peters (1934:348, 349) recognizes three other subspecies from the Pacific area: _G. a. rothschildi_ Hartert from Laysan, Lisiansky, and Krusenstern islands; _G. a. candida_ (Gmelin) from "the Carolines east to Christmas Island and south to the Tonga and Society Islands"; and _G. a. royana_ Mathews from Norfolk and the Kermadec Islands. Birds from Revilla Gigedo, Cocos and Clipperton islands, although geographically isolated, are placed in _G. a. candida_. On the basis of a critical study of specimens at hand, the populations in the Pacific fit into three groups. Small birds, _G. a. candida_, are found in the North Pacific from the Bonins and Marianas east to Wake and the Hawaiian Chain and south to the Marshall, Phoenix, Christmas and the Fanning islands (see figure 12). Larger birds, _G. a. pacifica_, are found in the Central Pacific and South Pacific from the Carolines in the west southeastward through Melanesia and eastward through Samoa, to the Tuamotus and Easter to Cocos, Clipperton, and Revilla Gigedo islands. In the Southwest Pacific, at Norfolk and the Kermadec Islands, a longer-winged population occurs; it is separable as _G. a. royana_. The measurements of these birds are given in table 24. TABLE 24. MEASUREMENTS OF _Gygis alba_ FROM THE PACIFIC AREA Column headings: A: No. B: Wing C: Longest tail feather D: Shortest tail feather E: Exposed culmen F: Depth Culmen G: Tarsus ======================+====+=======+=======+=====+=====+=======+========= LOCATION | A | B | C | D | E | F | G ----------------------+----+-------+-------+-----+-----+-------+--------- _Gygis alba candida_ | | | | | | | (Gmelin) | | | | | | | | | | | | | | Japan, Bonins | 4 | 238 | 109 | 65 | 36 | | | | | | |34-38| | | | | | | | | Mariana Islands | 35 | 237 | 111 | 69 | 38 | 9.0 | 13.0 | |227-246| 98-120|61-75|36-41| |12.0-14.0 | | | | | | | Wake Islands | 10 | 236 | 109 | 69 | 38 | | 13.0 | |232-243|101-118|64-77|37-41| |13.0-14.0 | | | | | | | Hawaiian Islands | 36 | 235 | 109 | 68 | 37 | 8.5 | 13.0 | |220-246|102-118|64-74|33-40|8.0-9.0|12.0-14.0 | | | | | | | Marshall Islands | 4 | 234 | 111 | 71 | 39 | | | |231-238|107-115|70-73|38-40| | | | | | | | | Phoenix, Howland, | | | | | | | Hull, Canton Islds.| 8 | 238 | 107 | 70 | 39 | 8.5 | 14.0 | |237-240|101-116|64-76|37-41| | | | | | | | | Fanning, Washington,| | | | | | | Christmas Islands | 19 | 238 | 107 | 68 | 38 | 8.0 | 13.5 | |227-242| 97-119|65-72|37-42|7.5-9.0|12.0-15.0 +----+-------+-------+-----+-----+-------+--------- Totals |116 | 236 | 109 | 69 | 38 | 8.5 | 13.0 | |220-246|107-120|61-77|33-42|7.5-9.0|12.0-15.0 | +=======+=======+=====+=====+=======+========= _Gygis alba pacifica_ | | | | | | | (Lesson) | | | | | | | | | | | | | | Caroline, Palau | | | | | | | Islands | 33 | 245 | 116 | 73 | 42 | 8.5 | 13.5 | |236-253|112-125|67-76|38-44| |13.0-13.5 | | | | | | | Bismarck Arch., | | | | | | | Solomon Islands | 12 | 247 | 116 | 74 | 42 | | | |242-256|105-129|68-78|39-45| | | | | | | | | Samoa, Wallis, Fiji,| | | | | | | Tonga, Niue Islands| 20 | 247 | 115 | 71 | 42 | | | |239-254|110-127|67-78|39-44| | | | | | | | | Line, Danger Islands| 13 | 245 | 115 | 73 | 41 | | | |238-252|107-118|69-78|39-42| | | | | | | | | Cook,Austral Islands| 29 | 247 | 114 | 73 | 42 | | | |241-255|104-124|65-78|40-45| | | | | | | | | Society Islands | 37 | 249 | 113 | 71 | 42 | 8.5 | 13.5 | |241-257|107-126|62-76|40-45|8.0-9.0|12.0-14.0 | | | | | | | Tuamotu Arch |118 | 245 | 114 | 72 | 42 | | | |236-252|107-127|62-82|38-46| | | | | | | | | Rapa, Bass Rocks, | | | | | | | Oeno, Henderson, | | | | | | | Ducie, Pitcairn, | | | | | | | Easter Islands | 54 | 247 | 113 | 73 | 41 | | | |240-255|106-126|63-84|40-45| | | | | | | | | Clipperton, Cocos | | | | | | | Islands | 10 | 245 | 115 | 72 | 40 | 8.5 | 13.5 | |240-253|110-120|71-73|38-43|8.5-9.5|13.0-14.0 +----+-------+-------+-----+-----+-------+--------- Totals |326 | 246 | 114 | 72 | 42 | 8.5 | 13.5 | |236-257|104-129|62-84|38-46|8.0-9.5|12.0-14.0 | +=======+=======+=====+=====+=======+========= Intergrades between | | | | | | | _G. a. microrhyncha_| | | | | | | and _G. a. pacifica_| 9 | 237 | 105 | 74 | 38 | 7.5 | 13.0 | |230-247| 93-122|67-89|36-41|7.0-8.0|12.0-14.0 | | | | | | | _Gygis alba | | | | | | | microrhyncha_ | 55 | 218 | 78 | 64 | 36 | 6.5 | 12.0 | |211-235| 72-96 |60-75|32-39|6.0-8.0|11.0-12.5 | | | | | | | _Gygis alba royana_ | | | | | | | Mathews | | | | | | | | | | | | | | Norfolk Islands | 16 | 250 | 113 | 73 | 42 | | | |242-257|105-124|68-79|41-44| | | | | | | | | Kermadec Islands | 12 | 251 | 115 | 75 | 43 | | | |244-255|110-121|71-81|40-46| | +----+-------+-------+-----+-----+-------+--------- Totals | 28 | 250 | 114 | 74 | 42 | | | |242-257|105-124|68-81|40-46| | ----------------------+----+-------+-------+-----+-----+-------+--------- The measurements indicate that there is a gradient in size from small in the north to large in the south; however, there is a definite separation in average measurements--ten millimeters in length of wing and four millimeters in length of exposed culmen--between the two populations which are designated as _G. a. candida_ and _G. a. pacifica_. In studying material from Micronesia and the Hawaiian Islands, I (1948:57) pointed out the similarities between birds of the Marianas and the Hawaiians and separated these from terns found in the Caroline Islands. The systematic position of the White Tern in the Gilbert and Ellice islands will remain in doubt until specimens are available for examination. _G. a. royana_ is provisionally retained as the name for the Fairy Tern of the Kermadecs and Norfolk Island; there is considerable overlap in measurements between _G. a. royana_ and _G. a. pacifica_. Measurements have given evidence of the degrees of structural resemblance of the White Terns of the different islands, but it is not certain that the groupings made on this basis are natural; more data is needed on ecology and life history. Of particular importance is to learn whether these birds fly regularly from island to island. On the basis of eleven months of rather continuous observation in Micronesia, I suspect that the White Tern has little tendency to make inter-island migrations. This might account for the differences in size in the populations at Guam in the Marianas (_G. a. candida_) and at Ulithi in the Carolines (_G. a. pacifica_) where only approximately 400 miles of open water separate the two islands. The occurrence of the distinct _G. a. microrhyncha_ in the Marquesas may be accounted for by such nonmigratory behavior. Mayr (1945a:27), however, is of the opinion that White Terns found in the Bismarck Archipelago, the Solomons, Santa Cruz and New Hebrides islands may not breed there, which is another way of saying that they are migrants. Swarth (1934:221) and Murphy (1936:1268) record the wandering of the White Tern to the Galapagos Islands, probably from breeding grounds at Cocos Island. Swarth suggests that the tern is not established at the Galapagos because of the presence of colder water in the area. Murphy (1936:1166) is of the opinion that the South Atlantic White Terns are sedentary, but reports evidence of pelagic migration in the Pacific at the Kermadecs. The fact that _G. alba_ is restricted in its distribution to widely separated groups of islands in tropical and subtropical areas of the South Atlantic, Indian and Pacific oceans may indicate that the birds at one time had a more extensive range than at present, probably including even coastal regions of the continents and large continental islands. =Gygis alba pacifica= (Lesson) White Tern _Sterna pacifica_ Lesson, Ann. Sci. Nat., 4, 1825, p. 101. (Type locality, Society Islands, Paumotu Islands, and Bora Bora.) _Sterna alba_ Kittlitz, Kupfertaf. Naturgesch. Vögel, 3, 1833, p. 28 (Carolinen); _idem_, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 286, 299, 308 (Ualan, Lougounor, Ouleai). _Gygis candida_ Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 137 (Carolinen); Hartlaub, Journ. f. Ornith., 1854, p. 168 (Carolinen); Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, p. 382, 2, 1858, pp. 39, 60 (Ualan); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 59 (Caroline Islands); Saunders (part), Cat. Birds British Mus., 25, 1896, p. 149 (Pelew, Carolines); Takatsukasa and Kuroda, Tori, 1, 1915, p. 51 (Ruk, Pelew). _Gygis alba_ Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 233 (Carolinen); Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 832 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 9, 118 (Pelew); Finsch and Hartlaub, Journ. f. Ornith., 1870, p. 140 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 90, 114 (Pelew, Uap, Ualan); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 6, 43 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 40 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 782 (Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 295, 309 (Ponapé, Kuschai); _idem_, Proc. Zool. Soc. London, 1880, p. 577 (Ruk); _idem_, Ibis, 1881, pp. 105, 106, 109, 115, 246, 247 (Kushai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 299, 330, 353 (Mortlock, Nukuor, Ruk); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 52 (Kuschai); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 78 (Pelew, Uap, Luganor, Nukuor, Ruk, Ponapé, Ualan); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 8, 1896, p. 58 (Palaos, Carolines); Baker (part), Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 57 (Peleliu, Ulithi, Truk, Kusaie). _Gygis alba kittlitzi_ Hartert, Katalog Vogelsamml. Senckenb., 1891, p. 237 (Type locality, Ulea = Wolea); _idem_, Novit. Zool., 7, 1900, p. 10 (Ruk); Dubois, Syn. Avium, 2, 1904, p. 1020 (Carolines); Mathews (part), Birds Australia, 2, 1912, p. 443 (Carolines); Ridgway (part), Bull. U. S. Nat. Mus., 50, pt. 8, 1919, p. 559 (Carolines); Kuroda (part), Avifauna Riu Kiu, 1925, p. 193 (Carolines); Hand-list Japanese Birds (part), rev., 1932, p. 196 (Pelew, Yap, Wolea, Luganor, Ruk, Ponapé, Kusaie); Yamashina (part), Tori, 10, 1940, p. 678 (Babelthuap). _Gygis albus kittlitzi_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 50 (Pelews, Yap, Wolea, Luganor, Nukuor, Ruk, Ponapé, Kusaie). _Leucanous albus kittlitzi_ Mathews (part), Syst. Avium Australasianarum, 1, 1927, p. 143 (Carolines). _Gygis alba candida_ Peters, Check-list Birds World, 2, 1934, p. 349 (Carolines); Hand-list Japanese Birds (part), 3d ed., 1942, p. 219 (Babelthuap, Koror, Angaur, Yap, Wolea, Truk, Lukunor, Nukuoro, Ponapé, Kusaie). _Geographic range._--Central and southern Pacific from Carolines southeast through Melanesia and east through Samoa to Tuamotus, Easter to Cocos and Clipperton (see figure 12). In Micronesia: Palau Islands--Angaur, Peleliu, Garakayo, Koror, Babelthuap, Kayangel; Caroline Islands--Yap, Ulithi, Wolea, Truk, Lukunor, Ponapé, Kusaie. _Characters._--Resembles _G. a. candida_, but size larger, wing length of adult males and females 236-253 (245); length of exposed culmen 38-44 (42). _Measurements._--Measurements are listed in table 24. _Specimens examined._--Total number, 36 (22 males, 12 females, 2 unsexed), as follows: Palau Islands, USNM--Peleliu, 1 (Sept. 1); AMNH--exact locality not given, 1 (Nov. 13);-Caroline Islands, USNM--Ulithi, 12 (Aug. 14, 15, 16, 20, 21)--Truk, 1 (Dec. 13); AMNH--Truk, 7 (Mar. 8, May 7, June 8, Nov. 11, 26)--Ponapé, 1 (undated)--Kusaie, 10 (Jan., Feb., March 20-30, April 1-10); MCZ--Yap, 3 (Jan. 13). _Nesting._--The NAMRU2 party learned that in May and June, 1945, several young White Terns were seen at Asor, Ulithi Atoll, by service personnel. These young were observed in breadfruit trees within a recreational area; the presence of the service personnel seemingly had little disturbing effect on the terns. At Bulubul, another island of this atoll, a downy young was obtained on August 22. Hartert (1900:10) reports that eggs of the White Tern were found on the ground and in forks of branches of trees at Truk in June. _Food Habits._--The author (1948:58) reports that stomachs of birds taken at Ulithi and Peleliu contained fish, insects and marine crustaceans. Probably the birds feed to a large extent along the edge of the tidal reef. They almost certainly obtain food also on the islands as indicated by the presence of insects in stomach contents; this is not surprising since the birds frequent woodland habitats. _Remarks._--_Gygis alba_ is one of the most characteristic birds in Micronesia. It is seemingly more numerous at the coral atolls than at the high, volcanic islands. At the latter islands the birds prefer the coastal coconut grove environment. At Pau and Bulubul, two small islands in the Ulithi Atoll, the writer counted approximately 100 birds on August 21, 1945. Kittlitz was the first to publish an account of these birds in the Caroline Islands. Tetens, Peters, Semper and Kubary reported their presence in the Palaus. No doubt, these terns attract the attention of every traveler in the islands owing to their conspicuously white beauty and their seemingly friendly behavior toward man. Their habit of hovering in small flocks close over the head of the observer is indeed spectacular. =Columba livia= Gmelin Blue Rock Pigeon _Columba domestica [Greek: b] livia_ Gmelin, Syst. Nat., 1, pt. 2, 1789, p. 769. (No type locality = Europe.) _Columba livia_ Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam); Marshall, Condor, vol. 51, 1949, p. 221 (Tinian). _Geographic range._--Europe and Asia Minor. Introduced to many parts of the world. In Micronesia: Mariana Islands--Guam, Tinian. _Remarks._--In 1945, the NAMRU2 party observed pigeons about the towns on Guam, particularly at the town of Inarajan. Bryan (1936:24) writes that the birds were introduced by the United States Navy and Marine Corps at Guam; the stock originating from escaped carrier pigeons. Marshall (1949:221) records this bird from Tinian. =Ptilinopus porphyraceus ponapensis= (Finsch) Crimson-crowned Fruit Dove _Ptilinopus ponapensis_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 779. (Type locality, Ponapé.) _Ptilinopus? fasciatus_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 18, 37 (Ponapé). _Ptilopus fasciatus_ Elliot, Proc. Zool. Soc. London, 1878, p. 536 (Ponapé); Tristram, Cat. Birds, 1889, p. 44 (Ponapé). _Ptilopus ponapensis_ Schmeltz, Verhandl. Ver. nat. Unterhaltung Hamburg, 1877 (1879), pp. 178, 179 (Ponapé); Finsch, Proc. Zool. Soc. London, 1880, p. 576 (Ruk, Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 291, 303 (Ponapé); _idem_, Proc. Zool. Soc. London, 1880, p. 578 (Ruk, Ponapé); _idem_, Ibis, 1881, pp. 113, 115 (Ponapé); Wiglesworth, Ibis, 1891, p. 583 (Ponapé, Ruk); _idem_, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 50 (Ponapé, Ruk); Salvadori, Cat. Birds British Mus., 21, 1893, p. 93 (Ponapé, Ruk); Oustalet, Nouv. Arch. Mus. Hist. Nat., Paris, (3), 7, 1895, p. 222 (Ponapé); Nehrkron, Kat. Eiers., 1899, p. 180 (Ruk); Dubois, Syn. Avium, 2, 1904, p. 736 (Ruck, Ponapé); Reichenow, Die Vögel, 1, 1913, p. 354 (Ruk, Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Ruk, Ponapé); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 189 (Uala, Ponapé). _Ptilinopus ponapensis_ Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk); Hartert, Novit. Zool., 7, 1900, p. 7 (Ruk, Ponapé); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 42 (Ponapé); Matschie, Journ. f. Ornith., 1901, p. 113 (Ruck, Ponapé); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 32 (Ponapé); Bequaert, Mushi, 12, 1939, pp. 81, 82 (Ponapé); Mayr. Proc. 6th Pacific Sci. Congr., 4, 1939 (1941), p. 204 (Ponapé); Bequaert, Occ. Papers Bernice P. Bishop Mus., 16, 1941, pp. 266, 290 (Ponapé). _Ptilinopus Ponapensis_ Christian, The Caroline Islands, 1899, p. 357 (Ponapé). _Ptilinopus ponepensis ponapensis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 57 (Ponapé, Ruk); Yamashina, Tori, 7, 1932, p. 408 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 190 (Ponapé, Ruk); Peters, Check-list Birds World, 3, 1937, p. 31 (Ruk, Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 213 (Ponapé, Truk). _Ptilinopus porphyraceus ponapensis_ Ripley and Birckhead, Amer. Mus. Novit., no. 1192, 1942, p. 7 (Ruk, Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 289 (Truk, Ponapé); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 59 (Truk). _Geographic range._--Micronesia: Caroline Islands--Truk, Ponapé. _Characters._--Adult male: A green fruit dove with forehead, anterior lores and crown near "pansy purple," faintly margined with yellow; occiput, sides of head, neck, upper breast grayish-green with bifid feathers of midbreast more olivaceous; chin and midthroat light yellow; breast, sides and tibia green; midpart of lower breast dark bluish-green, tinged with dark purple; lower abdomen, vent, and undertail yellow, under tail-coverts deeper yellow tinged with orange; upper parts dark green; wings metallic green on outer webs and tips, inner secondaries and some posterior scapulars with purple spots near tips; primaries and secondaries edged on outer webs with yellowish; underwing gray with yellow edges on hind, under wing-coverts; upper side of tail metallic green with terminal, broad yellow band; under side of tail gray; bill lead-colored, feet wine-brown, iris whitish to pale brown. Adult female resembles adult male, but slightly smaller and duller. Immature: Resembles adult, but entirely green with yellow edgings on feathers and lacking crimson crown and colored breast patch. _Measurements._--Measurements of subspecies of _P. porphyraceus_ in Micronesia are presented in table 25. TABLE 25. MEASUREMENTS OF _Ptilinopus porphyraceus_ IN MICRONESIA ===================+============+===============+============+=========== | | | Exposed | SUBSPECIES | Number | Wing | culmen | Tarsus -------------------+------------+---------------+------------+----------- _P. p. ponapensis_ | 12 males | 137 (133-141) | 14 (13-15) | 25 (24-27) | 11 females | 133 (126-137) | 14 (13-15) | 25 (24-26) | | | | _P. p. hernsheimi_ | 6 males | 134 (130-138) | 13 (12-14) | 25 (24-26) | 5 females | 127 (125-130) | 13 (12-13) | 25 (24-25) | | | | _P. p. pelewensis_ | 10 males | 133 (131-134) | 15 (13-15) | 25 (23-26) | 4 females | 133 (130-138) | 15 (14-15) | 24 (23-24) -------------------+------------+---------------+------------+----------- _Specimens examined._--Total number, 81 (52 males, 26 females, 3 unsexed), as follows: Caroline Islands, USNM--Truk, 4 (Feb. 16, Dec. 24); AMNH--Truk, 24 (Jan., June, Oct.)--Ponapé, 53 (Nov., Dec). _Nesting._--Yamashina (1932a:408) reports on eggs taken at Ponapé on the following dates: July 10, 12, August 1, 12, 15, 21. Only one egg was found to a nest. Hartert (1900:8) records nests containing eggs in May and June at Truk. Coultas (field notes) describes the nest as a flimsy affair. At Ponapé in November and December he found nests on low branches (10 to 20 feet from the ground) each containing a single egg. Nests were found also in the tops of tree ferns. Females taken in these months had enlarged gonads. _Parasites._--Bequaert (1939:81, 82, and 1941:266, 290) records the two flies (Hippoboscidae), _Ornithoctona plicata_ and _O. pusilla_, from the fruit dove at Ponapé. _Remarks._--McElroy of the NAMRU2 party found the birds in mountainous areas at Truk in December, 1945. At Ponapé in November and December, 1931, Coultas (field notes) comments that the bird is rapidly disappearing owing to persistent hunting by the natives and, at that time, by the Japanese. He found the birds to be strictly forest-living and to frequent the larger fruit-bearing trees of the lowlands and the mountain sides. Coultas writes that the Japanese hunters attracted the doves by the use of calls. The natives catch the birds with a gum mixture obtained from bread-fruit gum and coconut oil. =Ptilinopus porphyraceus hernsheimi= (Finsch) Crimson-crowned Fruit Dove _Ptilopus Hernsheimi_ Finsch., Journ. f. Ornith., 1880, p. 303. (Type locality, Kuschai.) _Ptilopus hernsheimi_ Finsch, Proc. Zool. Soc. London, 1880, p. 577 (Kuschai); Reichenow and Schalow, Journ. f. Ornith., 1881, p. 75 (Kuschai); Finsch, Ibis, 1881, pp. 106, 107, 108 (Kushai); Wiglesworth, Ibis, 1891, p. 583 (Ualan); _idem_, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 51 (Ualan); Salvadori, Cat. Birds British Mus., 21, 1893, p. 94 (Ualan); Oustalet, Nouv. Arch. Mus. Hist. Nat., Paris, (3), 7, 1895, p. 222 (Oualan); Dubois, Syn. Avium, 2, 1904, p. 736 (Kuschai); Reichenow, Die Vögel, 1, 1913, p. 355 (Kuschai); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 189 (Kusaie). _Ptilinopus hernsheimi_ Matschie, Journ. f. Ornith., 1901, p. 113 (Ualan); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 33 (Kusaie). _Ptilinopus ponapensis hernsheimi_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 57 (Kusaie); Hand-list Japanese Birds, rev., 1932, p. 190 (Kusaie); Peters, Check-list Birds World, 3, 1937, p. 31 (Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 212 (Kusaie). _Ptilinopus marshallianus_ Peters and Griscom, Proc. New England Zool. Club, 10, 1928, p. 104 (Type locality, Ebon); Hand-list Japanese Birds, rev., 1932, p. 190 (Ebon). _Ptilinopus ponapensis marshallianus_ Peters, Check-list Birds World, 3, 1937, p. 31 (Ebon); Hand-list Japanese Birds, 3d ed., 1942, p. 213 (Ebon). _Ptilinopus porphyraceus hernsheimi_ Ripley and Birckhead, Amer. Mus. Novit., no. 1192, 1942, p. 6 (Kusaie, Ebon); Mayr, Birds Southwest Pacific, 1945, p. 289 (Kusaie). _Geographic range._--Micronesia: Caroline Islands--Kusaie; Marshall Islands--Ebon (extinct?). _Characters._--Adult: Resembles _P. p. ponapensis_, but occiput, nape, sides of head more gray and less greenish-yellow; chin and midthroat paler; crown coloring very faintly margined with yellow; tail band brighter yellow; under tail-coverts more orange; abdominal spot may be present as a brownish-red tinge; abdomen slightly more yellowish. Immature: Resembles immature of _P. p. ponapensis_. _Measurements._--Measurements are listed in table 25. Ripley and Birckhead (1942:7) give the measurements of the only known specimen from Ebon (Marshall Islands) as: wing, 124; tail, 74; bill from base, 15. _Specimens examined._--Total number, 11 (6 males, 5 females), as follows: Caroline Islands, USNM--Kusaie, 1 (Feb. 9); AMNH--Kusaie, 10 (Jan., Feb., March, April). _Remarks._--I am following Ripley and Birckhead (1942:6) in identifying the dove from Ebon Island as of the subspecies _P. p. hernsheimi_. This specimen from Ebon may, however, represent the final vestige of a formerly well-distributed population in the Marshall Islands. This distribution is of particular interest because it may show the pathway by which these small fruit pigeons invaded eastern Micronesia from Polynesia. The small fruit dove at Kusaie has apparently the same habitat requirements as others of the species. Coultas (field notes) comments that in 1931 the birds were "quite common." He found them in the high trees on the mountain sides away from the native villages and gardens. =Ptilinopus porphyraceus pelewensis= Hartlaub and Finsch Crimson-crowned Fruit Dove _Ptilinopus pelewensis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 7. (Type locality, Pelew Islands.) _Ptilinopus pelewensis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 118 (Pelew); Gray, Hand-list Birds, 2, 1870, p. 225 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 101 (Pelew); Gräffe, Journ. Mus. Godeffroy, 1, 1873, pl. 7, fig. 5 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 24 (Palau); Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 37 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Matschie, Journ. f. Ornith., 1901, p. 113 (Palau); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 56 (Pelew); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 32 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 190 (Palau); Peters, Check-list Birds World, 3, 1937, p. 31 (Babeltop, Korror); Hand-list Japanese Birds, 3d ed., 1942, p. 213 (Babelthuap, Koror). _Ptilonopus pelewensis_ Finsch, Proc. Zool. Soc. London, 1874, p. 94 (Pelew). _Ptilopus pelewensis_ Giebel, Thes. Ornith., 3, 1877, p. 366 (Pelew); Elliot, Proc. Zool. Soc. London, 1878, p. 531 (Palau); Schmeltz, Verhandl. Ver. nat. Unterhatlung Hamburg, 1877 (1879), p. 178 (Pelew); Tristram, Cat. Birds, 1889, p. 44 (Pelew); Wiglesworth, Ibis, 1891, p. 584 (Pelew); _idem_, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 48 (Pelew); Salvadori, Cat. Birds British Mus., 21, 1893, p. 86 (Pelew); Dubois, Syn. Avium, 2, 1904, p. 736 (Pelew); Reichenow, Die Vögel, 1, 1913, p. 354 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Pelew). _Ptilinopus porphyraceus pelewensis_ Ripley and Birckhead, Amer. Mus. Novit., no. 1192, 1942, p. 7 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 289 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 60 (Peleliu, Ngabad, Garakayo). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Ngabad, Anguar. _Characters._--Adult male: A green fruit pigeon with anterior lores and crown purple, margined with pale yellow; forehead paler than crown; chin and midthroat pale yellow; neck, sides of head, and breast greenish-gray, darker on occiput; feathers of upper breast cross-banded with partly concealed violet bands; abdomen orange, its lower part and region of vent yellow; sides greenish; tibia grayish; under tail-coverts near "Indian lake" with yellowish-orange edgings; upper parts green; wings metallic green, secondaries and primaries margined on outer webs with yellow; inner secondaries spotted with violet-blue near tips; under wing gray; upper side of tail green with pale yellow terminal band; under side of tail gray; bill lead-colored; feet dark blood-red. Adult female: Resembles adult male, but upper parts greener with upper side of wing and upper tail-coverts washed with olivaceous-brown; breast duskier. Immature resembles adult, but lacks purple crown, violet breast spot, orange abdomen and maroon under tail-coverts; upper and lower parts margined with yellow; forehead pale green; supercillary stripe pale yellow. _P. p. pelewensis_ resembles _P. p. ponapensis_, but crown more purple; yellow tail-bar narrower; bifurcated, central breast feathers violet; abdomen orange; and under tail-coverts near "Indian lake". _Measurements._--Measurements are presented in table 25. _Specimens examined._--Total number, 14 (10 males, 4 females), as follows: Palau Islands, USNM--Koror, 3 (Nov. 14, Dec. 3)--Garakayo, 1 (Sept. 19)--Peleliu, 3 (Aug. 27, Sept. 1, 4)--Ngabad, 2 (Sept. 11)--Pelew, 2 (Mar. 1, 2); AMNH--Palau, 3 (Oct., Dec.). _Nesting._--At Ngabad Island on September 11, 1945, the NAMRU2 party found a nest in jungle in a low tree about six feet above the ground. It was loosely constructed and contained a single white egg, size 31 by 23 mm. Another nest was found at Ngabad the same day. It was on the branch of a tree approximately 20 feet from the ground. The nest was not examined other than to observe a parent bird on the nest. Three males obtained in August and in September had enlarged testes. Males taken in December by Coultas had enlarged testes. _Food Habits._--Stomachs examined by the NAMRU2 party contained fruit parts and seeds. This species seemingly obtains its foods from the large fruit-producing trees and to a lesser extent from the smaller shrubs or from ground berries. _Remarks._--_P. p. pelewensis_ was found in small numbers at all islands visited in the southern Palaus by the NAMRU2 party in 1945. At Peleliu, the bird was restricted to undisturbed woodlands and thickets, although some were seen in the thickly growing vegetation covering over the battle areas. The bird evidently lives a solitary existence; it was only rarely observed in pairs. It was often located by its calls. Coultas (field notes) reports that in 1931 the species was becoming rare in the Palaus, owing to persistent hunting by the Japanese, who sold the bird for 25 sen each. =Ptilinopus roseicapillus= (Lesson) Marianas Fruit Dove _Columba roseicapilla_ Lesson, Traité d'Ornith., 6, 1831, p. 472. (Type locality, Marianne Islands.) _Columba roseicapilla_ Lesson, Compl. de Buffon, 2d ed., 2, Oiseaux, 1838, p. 278 (Mariannes). _Columba purpurata_ Kittlitz, Kupfertaf. Naturgesch. Vögel, 3, 1833, p. 25, pl. 23, fig. 2 (Guahan); _idem_, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 305 (Guahan). _Ptilinopus purpuratus_ Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen); Hartert, Katalog Vogelsamml. Senckenb., 1891, p. 190 (Guaham). _Ptilopus roseicapillus_ Bonaparte, Comptes Rendus Acad. Sci. Paris, 39, 1854, p. 877 (Mariannes); _idem_, Icon. Pigeons, 1857, pl. 23 and desc. letterpress (Mariannes); Schlegel, Mus. Pays-Bas, 6, no. 35, 1873, p. 8 (Guam); Giebel, Thes. Ornith., 3, 1877, p. 368 (Mariannae); Elliot, Proc. Zool. Soc. London, 1878, p. 537 (Marianne); Oustalet, Le Nat., 1889, p. 261 (Mariannes); Wiglesworth, Ibis, 1891, p. 584 (Marianne); _idem_, Abhandl. und Ber Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 48 (Marianne); Salvadori, Cat. Birds British Mus., 21, 1893, p. 108 (Marianne Islands); Oustalet, Nouv. Arch. Mus. Hist. Nat., Paris, (3), 7, 1895, p. 218 (Saypan, Guam, Rota); Safford, The Plant World, 7, 1904, p. 264 (Guam); Dubois, Syn. Avium, 2, 1904, p. 736 (Mariannes); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 78 (Guam); Schnee, Zeitschr. f. Naturwisch., 82, 1912, p. 465 (Marianen); Prowazek, Die deutschen Marianen, 1913, p. 101 (Marianen); Reichenow, Die Vögel, 1, 1913, p. 354 (Marianen); Cox, Island of Guam, 1917, p. 20 (Guam); Bryan, Guam Rec. vol. 13, no. 2, 1936, p. 24 (Guam); Thompson, Guam and its people, 1942, p. 23 (Guam). _Kurukuru roseicapillus_ Prévost and Des Murs, Voy. "Venus," Oiseaux, 1855, pp. 221, 231, 257, 259, 269 (Guam). _Ptilopus roseicapilla_ Bonaparte, Consp. Avium, 2, 1855, p. 21 (Mariannis). _Ptilonopus roseicapillus_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 31 (Guam); Reichenbach, Tauben, 1861, p. 96 (Mariannen); Finsch, Proc. Zool. Soc. London, 1874, p. 94 (Mariannes). _Ptilinopus roseicapillus_ Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, pp. 122, 127 (Mariannen); Gray, Hand-list Birds, 2, 1870, p. 225 (Ladrones); Hartert, Novit. Zool., 5, 1898, p. 60 (Guam, Rota, Saipan); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 39 (Guam, Rota, Saipan); Matschie, Journ. f. Ornith., 1901, p. 113 (Guam, Saipan); Safford, Osprey, 1902, p. 68 (Marianas); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 56 (Guam, Rota, Saipan); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 33 (Marianne); Hand-list Japanese Birds, rev., 1932, p. 190 (Tinian, Saipan, Rota); Hand-list Japanese Birds, 3d ed., 1942, p. 212 (Guam, Rota, Tinian, Saipan); Mayr, Birds Southwest Pacific, 1945, p. 288 (Marianas); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 95 (Tinian); Watson, The Raven, 17, 1946, p. 42 (Guam); Strophlet, Auk, 63, 1946, p. 538 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam); Stott, Auk, 64, 1947, p. 526 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 59 (Guam, Rota). _Ptilopus diadematus_ Giebel, Thes. Ornith., 3, 1877, p. 363 (Marianae). _Ptilinopus roseicapilla_ Peters, Check-list Birds World, 3, 1937, p. 31 (Saipan, Tinian, Rota, Guam); Ripley and Birckhead, Amer. Mus. Novit., no. 1192, 1942, p. 3 (Guam, Rota, Tinian, Saipan). _Geographic range._--Micronesia: Mariana Islands--Guam, Rota, Tinian, Saipan. _Characters._--Adult male: A green dove with crown, forehead, anterior lores, and spot at base of mandible near "aster purple," margined with pale yellow especially on top of head; chin and throat pale yellow to white; sides of head greenish-gray, darker on occiput; breast green with pearly-gray tinge on feathers of middle part; lower breast with dark purple patch; abdomen orange with yellowish-green coloring at midline; anal region and lower tail-coverts yellow, tinged with orange on lower tail-coverts; sides and tibia greenish with yellow tinges; upper parts green, more yellowish-green on rump; wings glossy, upper wing-coverts brighter in middle and margined with yellow; under side of wing and under side of tail gray; upper side of tail green with broad grayish terminal band margined with yellow; iris pale yellow; bill grass-green; legs and feet reddish-black. Adult female: Resembles male, but slightly smaller with neck greener. Immature resembles adult, but lacking colored crown; body feathers edged with yellow. Birds from Guam, Rota, and Tinian exhibit no conspicuous differences. _P. roseicapillus_ is closest to _P. regina_ of southern Papua, Lesser Sunda Islands, and Australia being, according to Ripley and Birckhead (1942:3), "Similar to _regina_, but crown and abdominal band darker; malar apex concolorous with crown; hind neck more grayish; tail-bar wider and paler." _Measurements._--Measurements of _P. roseicapillus_ are presented in table 26. _Weights._--In 1948 (1948:59) I listed the weights of 14 adult males as 81-103 (90), of 4 adult females as 85-99 (92), and of one nestling in post natal molt as 44 grams. These were taken at Guam. _Specimens examined._--Total number, 43 (32 males, 10 females, 1 unsexed), as follows: Mariana Islands, USNM--Guam, 28 (March 8, May 25, 27, June 3, 12, 14, July 2, 6, 10, 18, 19, 29, Aug. 21)--Rota, 3 (Oct. 28, 31, Nov. 2)--Tinian, 1 (Oct. 26); AMNH--Guam, 8 (Aug.)--Tinian, 3 (Sept.). TABLE 26. MEASUREMENTS OF _Ptilinopus roseicapillus_ =================+===============+============+==============+=========== | | | Exposed | NUMBER | Wing | Tail | culmen | Tarsus -----------------+---------------+------------+--------------+-------------- 32 adult males | 127 (122-133) | 80 (75-84) | 14 (13-15.3) | 25 (24-27) 10 adult females | 124 (121-130) | 76 (75-79) | 13 (12-13.7) | 24 (22-25.5) -----------------+---------------+------------+--------------+-------------- _Nesting._--At Guam, I obtained records of nests of fruit doves on March 1, 1927, and May 7, 1945. David H. Johnson observed a pair of fruit doves in the act of copulation on May 26, 1945. Birds with enlarged gonads were taken by the NAMRU2 party in March and July. A nestling in post natal molt, just beginning to fly, was taken on July 6. Seale (1901:39) reports two nests, each containing one white egg, taken in the period from May to July. These nests were found in trees eight to ten feet above the ground. _Food habits._--The Marianas Fruit Dove feeds on fruits and seeds of trees and shrubs. The birds are apparently strictly tree dwellers; I saw no birds on the ground. A favorite fruit is that of a flowering shrub known as the "ink berry." Birds were collected which contained stomachs full of these small black berries. The fruit of the papaya is also a favorite food. _Remarks._--The NAMRU2 party found the Marianas Fruit Dove at Guam to be fairly numerous in undisturbed jungle, and more abundant in the heavy, second-growth, scrub-forest as was found on Amantes Point in 1945. The birds were secretive but were easily located by their calls. They were usually found as singles sitting quietly concealed in thick vegetation. Birds were seen flying rather infrequently, and then only for short distances. The removal of large tracts of jungle to provide space for the construction of air strips and installations in the late war has disturbed some of the habitat of these birds. Although vast tracts of forest were undisturbed, the birds probably have decreased at Guam. Coultas (field notes) found the birds common at the northern end of Guam in 1931. He commented that natives catch them with snares and bird lime for the local markets. At Tinian in 1931, Coultas found few birds. Downs (1946:95) and Stott (1947:526) record the birds at Tinian and Saipan, respectively, in 1945. At Rota, the NAMRU2 party found the dove to be numerous. _Evolutionary history of Ptilinopus in Micronesia._--Oceania is especially rich in species and subspecies of the genus _Ptilinopus_. Ripley and Birckhead (1942) have made the most recent and most thorough contribution concerning these birds. They state that the center of distribution for the genus lies in the Papuan region. Within the Oceanic region there are several species of _Ptilinopus_ which in one way or another are rather closely related; Rensch (1938:277) uses these as examples of species which have been formed by isolation. These include _P. perousii_ from Samoa, Fiji, and Tonga; _P. mercierii_ from the Marquesas; _P. dupetithouarsii_ from the Marquesas; _P. huttoni_ from Rapa; _P. purpuratus_ from Henderson, Tuamotus, Societies; _P. porphyraceus_ from Samoa, Fiji, Tonga, Carolines, Solomons, New Hebrides, New Caledonia, and adjacent areas; and _P. roseicapillus_ from Marianas. In all of these birds the crown is wine-red except in _P. dupetithouarsii_ in which it is whitish. _P. porphyraceus_ appears to be more closely related to _P. purpuratus_ than to any other species and is characterized by an often brightly washed spot of color of some shade of red or orange on the breast. These birds may have invaded Micronesia from the region of the Solomon Islands, although it appears more likely that they arose in the Samoa-Fiji-Tonga region and moved northward, probably by way of the Marshall Islands. _P. p. hernsheimi_ from Kusaie and _P. p. ponapensis_ from Ponapé and Truk resemble _P. p. faciatus_ Peale from Samoa more closely than they do any other subspecies. _P. p. pelewensis_ from Palau, on the other hand shows little relation to these other two Micronesian subspecies and appears to be closest to _P. p. porphyraceus_ of Fiji and Tonga or possibly to _P. grayi_ from Melanesia. Ripley and Birckhead (1942:7) suggest that the subspecies at Palau owes its marked divergence to its isolated position at the periphery of the range of the species. _P. p. pelewensis_ probably represents an independent and an earlier colonization, possibly from a stock different from that from which the two subspecies in the Carolines arose. The presence in the Palaus of subspecies singularly different from subspecies in the Carolines can also be observed in other genera, as for example, _Rhipidura_, and _Myiagra_. Figure 13 shows the inferred routes of colonization of _Ptilinopus_ to Micronesia. _P. roseicapillus_ seemingly represents a remnant, or perhaps a successful straggler, of an early invasion to Micronesia. Ripley and Birckhead (1942:2) classify this species as "Old Stock," along with _P. monachus_, _P. coronulatus_ and _P. regina_. Its pathway of invasion to the Marianas was probably directly northward from the Papuan area and not by way of the Polynesian islands. Its resemblance to the species _P. regina_ of southern Papua, Lesser Sundas, and Australia is most unusual, especially since there is a separation between the two species of some 1,400 miles; this is pointed out by Ripley and Birckhead (1942:4). As I have said (1948:59) elsewhere, "On the basis of its characters the Mariana birds would merit only subspecific separation, but owing to the great distance between the two doves and the possibility of independent origin and subsequent convergence, it may be more advisable to continue to regard the two as separate species." [Illustration: FIG. 13. Geographic distribution of _Ptilinopus porphyraceus_ and routes of its dispersal. (1) _P. p. porphyraceus_; (2) _P. p. fasciatus_; (3) _P. p. hernsheimi_; (4) _P. p. ponapensis_; (5) _P. p. pelewensis_.] =Ducula oceanica monacha= (Momiyama) Micronesian Pigeon _Globicera oceanica monacha_ Momiyama, Birds Micronesia, March, 1922, p. 4. (Type locality, Yap.) _Columba oceanica_ Lesson and Garnot (part), Dict. Sci. Nat., éd. Levrault, 40, 1826, p. 317 (Pelew); Lesson (part), Man. d'Ornith., 2, 1828, p. 166 (Pelew); _idem_ (part), Voy. "La Coquille," Zool., 2, 1828, pp. 432, 709 (Pelew); _idem_, Compl. de Buffon, 2d ed., 2, Oiseaux, 1838, p. 292 (Pelew); Prévost and Knip, Les Pigeons, 2, 1838-43, p. 49 (Pelew). _Carpophaga oceanica_ Hartlaub (part), Archiv. f. Naturgesch., 18, 1852, p. 115 (Pelewinseln); _idem_, Proc. Zool. Soc. London, 1867 (1868), p. 830 (Pelew); Gray (part), Hand-list Birds, 2, 1870, p. 229 (Pelew); Hartlaub and Finsch (part), Proc. Zool. Soc. London, 1872, pp. 89, 101 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 26 (Palau); _idem_ (part), Proc. Zool. Soc. London, 1877 (1878), pp. 775, 780 (Palau); Salvadori (part), Cronaca del R. Liceo-Ginnasio Cavour, 1878, pp. 3, 8 (Pelew); _idem_, Ibis, 1879, p. 364 (Pelew); Tristram, Cat. Birds, 1889, p. 42 (Pelew); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 52 (Pelew); Matschie (part), Journ. f. Ornith., 1901, p. 113 (Palau); Dubois (part), Syn. Avium, 2, 1904, p. 743 (Pelew); Reichenow (part), Die Vögel, 1, 1913, p. 351 (Palau). _Globicera oceanica_ Bonaparte (part), Consp. Avium, 2, 1855, p. 31 (Pelew); Reichenbach (part), Tauben, 1861, p. 120 (Pelew); Salvadori (part), Cat. Birds British Mus., 21, 1893, p. 176 (Pelew); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 52 (Pelew); Uchida, Annot. Zool. Japon., 9, 1918, pp. 486, 489 (Palau). _Carpophaga (Globicera) oceanica_ Gray (part), Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 41 (Pelew). _Carpophaga pacifica_ Finsch and Hartlaub (part), Fauna Centralpolynesiens, 1867, p. 145 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 7, 118 (Pelew); Finsch and Hartlaub, Journ. f. Ornith., 1870, p. 134 (Pelew). _Globicera oceanica monacha_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 55 (Yap); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 46 (Yap); Yamashina, Tori, 7, 1932, p. 408 (Yap); Hand-list Japanese Birds, rev., 1932, p. 189 (Yap, Palau, Current = Palo Anna). _Globicera oceanica momiyamai_ Kuroda, in Momiyama, Birds Micronesia, March, 1922, pp. 25, 56 (Type locality, Angaur); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 46 (Pelew); Kuroda, Ibis, 1927, p. 719 (Pelew). _Muscadivora oceanica winkleri_ Neumann, Verhandl. Ornith. Ges. Bayern, 25, Sept. 1, 1922, p. 234 (Type locality, Palau). _Ducula oceanica monacha_ Peters, Check-list Birds World, 3, 1937, p. 43 (Yap, Babelthuap, Koror, Angaur, Current); Hand-list Japanese Birds, 3d ed., 1942, p. 211 (Yap, Babelthuap, Koror, Angaur, Current); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 11 (Yap, Palau); Mayr, Birds Southwest Pacific, 1945, p. 289 (Palau, Yap); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 66 (Peleliu, Garakayo, Babelthuap). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Angaur, Palo Anna; Caroline Islands--Yap. _Characters._--Adult: Resembles _D. o. oceanica_ from Kusaie but throat, breast, head, and neck light ashy-gray; feathers around bill grayish-white; abdomen and under tail-coverts tipped with light brown. Immature: Resembles adult, but underparts paler; back lacking dark bluish spots; back feathers and wing feathers edged with light brown. _Measurements._--Measurements of _D. oceanica_ are listed in table 27. TABLE 27. MEASUREMENTS OF _Ducula oceanica_ =================+==========+=============+================+========== SUBSPECIES | Number | Wing | Exposed culmen | Tarsus -----------------+----------+-------------+----------------+---------- | | | | _D. o. monacha_ | 8 males |228 (219-233)| |36 (34-37) | 6 females|221 (214-228)|22.5 (22.0-23.0)|31 (29-33) | | | | _D. o. teraokai_ | 5 males |230 (225-237)|23.5 (23.0-25.0)|34 (33-35) | 8 females|231 (221-238)|23.0 (21.5-24.5)|34 (33-35) | | | | _D. o. townsendi_| 8 males |226 (211-234)|24.0 (23.5-25.0)|34 (32-35) | 5 females|226 (215-233)|24.0 (23.0-24.5)|33 (32-34) | | | | _D. o. oceanica_ | 4 males |222 (217-228)|25.0 (24.5-26.0)|35 (34-36) |13 females|219 (213-226)|24.0 (23.0-25.0)|32 (30-34) | | | | _D. o. | | | | ratakensis_[B] | 6 males | (211-217)| (25.0-27.0)| | 3 females| (208-213)| (25.0-26.0)| -----------------+----------+-------------+----------------+---------- [B] From Takatsukasa and Yamashina (1932:221). _Specimens examined._--Total number, 17 (9 males, 8 females), as follows: Palau Islands, USNM--Garakayo, 1 (Sept. 19)--Peleliu, 7 (Aug. 27, 28, 29, Sept. 4, 5); AMNH--Palau, 9 (Oct., Nov. 13, 15, 21, Dec. 1). _Nesting._--Yamashina (1932a:408) records the finding of one egg at Yap on December 3, 1930. The NAMRU2 party obtained no evidence of breeding activity of these pigeons at the Palaus in August and September, 1945. Coultas, in November and December of 1931, obtained birds with enlarged gonads at Palau. Probably the nesting season begins in November or December. _Food habits._--The pigeons feed on both fruits and green stuffs. The NAMRU2 party found berries, fruit parts and green plant materials in stomachs of birds taken in September, 1945. The birds were found to be exceedingly fat at this time. _Parasites._--Uchida (1918:486, 489) records the bird lice (Mallophaga), _Goniocotes carpohagae_ and _Colopocephalum unicolor_, from this pigeon at Palau. _Remarks._--The Micronesian Pigeon at Palau was first observed in 1783, when Captain Henry Wilson of the packet "Antelope" was shipwrecked in these islands. In his account of the islands, as compiled by George Keate (Wilson, 1788), Wilson described the large pigeons, which were kept as pets by the natives and were eaten by only certain classes of people. In 1826, Lesson and Garnot made first reference to the birds found by Wilson. It was almost 100 years after Wilson's visit that the bird was again observed; this time it was obtained by the sea captains, Tetens and Heinsohn, and by Kubary, the collector for the Godeffroy Museum. It is surprising that a pigeon as large and conspicuous as this one, has not already been exterminated by man on these small islands. Every traveller to the islands, who has made observations, writes that the pressure of hunting on these birds is severe. Coultas (field notes) reports that in 1931 the birds were "very scarce and wild." He comments that the Japanese hunters obtained the birds and received the market price of 35 sen for each one. He writes, "There is a group of Japanese hunters in the islands who vie with one another to see who can obtain the most birds. They are all atrocious shots but some employ natives and since so many of them are in the business they are inflicting considerable damage to the bird life. During my stay there one Japanese was sentenced to six weeks hard labor for hiring native hunters. The native hunter who preferred charges claimed that money was due him for having shot some 3,500 birds and the account had been standing over a year." Price (1936b:491) shows a picture of a captive pigeon at Palau. The natives used this bird as a calling decoy to attract others within range of their blowguns. The NAMRU2 party observed pigeons at all islands visited in August and September, 1945. At Peleliu, the pigeons were found to be restricted to relatively undisturbed areas where tall trees remained or where shrubs were present on the faces of overhanging cliffs. The shrubs on cliffs were favorite roosting places. Although the pigeons remained in these relatively inaccessible areas, they were not especially difficult to obtain with shotguns. I can see that it might be difficult for unarmed hunters to obtain the birds. The present writer (1946b:210) has recorded the extensive utilization of pigeons, rails and megapodes by Japanese troops and by their prisoners of war at Babelthuap and Koror during the latter part of the war. During our stay at Peleliu we were unable to learn whether the pigeon was still present at Pulo Anna (Current Island), a coral island some 160 miles southeast of Peleliu. The U. S. Navy frequently dispatched a ship to the island, but we did not learn of it until our stay at Peleliu was nearly over. Dr. C. K. Dorsey, then of the U. S. Naval Epidemiology Unit at Peleliu, reported that various kinds of birds were numerous at Pulo Anna, but he did not recall seeing the pigeon. This pigeon may occur also at Fais, a raised coral island west of Yap and Ulithi in the Carolines. I know of no reports dealing with the avifauna of this phosphate island, but I examined several pictures, taken by Navy landing parties and the Military Government personnel, which show the island to be covered with extensive and luxuriant vegetation. I suspect that an intensive survey of the island will reveal several new records for birds. =Ducula oceanica teraokai= (Momiyama) Micronesian Pigeon _Globicera oceanica teraokai_ Momiyama, Birds Micronesia, 1922, p. 2. (Type locality, Tol, Truk Islands.) _Columba oceanica_ Kittlitz (part), Kupfertaf. Naturgesch. Vögel, 3, 1833, p. 25, pl. 33, fig. 1 (Lugunor); _idem_ (part), Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 299 (Lougounor); Hartlaub (part), Archiv f. Naturgesch., 18, 1852, pp. 115, 185, (Mordlockinseln). _Carpophaga (Globicera) pacifica_ Gray (part), Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 41 (Mortlock's Island). _Carpophaga pacifica_ Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 146 (Lugunor). _Carpophaga oceanica_ Finsch, Proc. Zool. Soc. London, 1880, p. 576 (Ruk); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 330, 353 (Nukuor, Ruk); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 52 (Luganor, Ruk, Nukuor); Hartert, Novit. Zool., 7, 1900, p. 8 (Ruk). _Globicera oceanica_ Salvadori (part), Cat. Birds British Mus., 21, 1893, p. 176 (Ruk); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 52 (Ruk). _Globicera oceanica teraokai_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 55 (Ruk, ?Mortlock, ?Nukuor); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 45 (Ruk); Hand-list Japanese Birds, rev., 1932, p. 189 (Truk). _M[uscadivora] o[ceanica] oceanica_ Neumann (part), Verhandl. Ornith. Ges. Bayern, 25, 1922, p. 234 (Ualam = Truk). _Ducula oceanica teraokai_ Peters, Check-list Birds World, 3, 1937, p. 43 (Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 212 (Truk); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 11 (Truk); Mayr, Birds Southwest Pacific, 1945, p. 289 (Truk). _Geographic range._--Micronesia: Caroline Islands--Truk, ?Lukunor, ?Nukuoro. _Characters._--Adult: Resembles _D. o. monacha_, but slightly darker on crown, nape, and mantle; back more bluish and less greenish, underparts slightly darker chestnut. Differs from _D. o. townsendi_ by being paler and gray on crown, nape, shoulder, side of neck, and upper breast; abdomen and under tail-coverts slightly deeper chestnut. Differs from _D. o. oceanica_ by larger size; upper parts paler; abdomen and under side of tail deeper chestnut. I agree with Amadon (1943:11) that this subspecies is only doubtfully distinct from _D. o. monacha_ and that it might be advisable to unite these under one subspecific name. _Measurements._--Measurements are listed in table 27. _Specimens examined._--Total number, 14 (5 males, 9 females, 1 unsexed) from Caroline Islands, AMNH--Truk (Nov., Dec.). _Remarks._--The Micronesian Pigeon at Truk was observed by Kittlitz (1836:299) and later by Kubary at the islands of Lukunor and Nukuoro. Momiyama (1922:4) remarks that he did not see specimens from these two islands but concludes that they probably belong to the subspecies named from Truk. It is possible that birds at these two atolls have been exterminated, although adequate field investigations have not been made. There is little information published concerning the natural history of this subspecies. McElroy, who visited Truk in December, 1945, did not find the bird; however, he did not visit all of the islands in the group during his stay. =Ducula oceanica townsendi= (Wetmore) Micronesian Pigeon _Globicera oceanica townsendi_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 191. (Type locality, Ponapé). _Carpophaga oceanica_ Finsch (part), Proc. Zool. Soc. London, 1877 (1878), p. 780 (Ponapé); Nehrkorn, Journ. f. Ornith., 1879, p. 407 (Ponapé); Finsch (part), Journ. f. Ornith., 1880, p. 292 (Ponapé); _idem_, 1881, pp. 113, 115 (Ponapé); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 52 (Ponapé); Matschie (part), Journ. f. Ornith., 1901, p. 113 (Guam, error = Ponapé). _Globicera oceanica_ Salvadori (part), Cat. Birds British Mus., 21, 1893, p. 176 (Ponapé). _Globicera oceanica townsendi_ Momiyama, Birds Micronesia, 1922, p. 6 (Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 55 (Ponapé); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 45 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 190 (Ponapé). _Ducula oceanica townsendi_ Peters, Check-list Birds World, 3, 1937, p. 44 (Ponapé); Bequaert, Mushi, vol. 12, no. 2, 1939, pp. 81, 82 (Ponapé); _idem_, Occ. Papers Bernice P. Bishop Mus., 16, 1941, pp. 266, 290 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 212 (Ponapé); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 11 (Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 289 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: Resembles _D. o. teraokai_, but darker. Resembles. closely _D. o. oceanica_ but larger and darker on crown and nape; lower parts slightly paler but chin more cream-buff in color. As Adamon (1943:11) states, there is little difference between _D. o. townsendi_ and _D. o. oceanica_ except in size. _Measurements._--Measurements are listed in table 27. _Specimens examined._--Total number 21 (11 males, 9 females, 1 unsexed), as follows: Caroline Islands, USNM--Ponapé, 2 (Feb. 11, 12); AMNH--Ponapé, 19 (Nov. 22, 29, Dec. 1, 2, 3). _Nesting._--Coultas (field notes) writes that the pigeon at Ponapé nests the year around, probably two or three times a year. He describes the nest as being made of loose twigs and as placed on a fork of a limb in a tall tree. One egg is laid. Coultas saw "two or three" females nesting in December. _Parasites._--Bequaert (1939:81, 82 and 1941:266, 290) found the flies (Hippoboscidae), _Ornithoctona plicata_ and _O. pusilla_, on pigeons from Ponapé. _Remarks._--Coultas (field notes) writes that in 1930 several Japanese made a livelihood as professional hunters of pigeons at Ponapé. He notes, "Two or three years ago, 4 or 5 Japanese, each, averaged from 75 to 100 birds per day, which they sold to the inhabitants for 35 sen (17-1/2 cents) per bird.... Now these same hunters are fortunate if they obtain 4 or 5 Ducula each per day and are able to do so only by starting before daylight and covering great distances. Other birds are now replacing Ducula on the market." Coultas further records in his notes that the hunters used calls to attract the pigeons. In 1930, Coultas regarded the pigeon at Ponapé as a rapidly disappearing species; he found it only in small areas in remote regions of the mountains. With the shipping of supplies cut off to the Japanese garrison forces at Ponapé, as well as at Kusaie, Truk, and Yap by the effective American blockade during the latter part of the war, it is probable that the pigeons were hunted more intensively by the Japanese hunting parties than ever before. Richards obtained two specimens at Ponapé in the period from August, 1947, to January, 1948. =Ducula oceanica oceanica= (Lesson and Garnot) Micronesian Pigeon _Columba oceanica_ Lesson and Garnot, Dict. Sci. Nat., éd., Levrault, 40, 1826, p. 316. (Type locality, Oualan = Kusaie.) _Columba oceanica_ Lesson (part), Voy. "La Coquille," Zool.; Atlas, 1826, pl. 41; vol. 2, 1828, pp. 432, 708 (Oualan or Strong); _idem_, (part), Man. d'Ornith., 11, 1828, p. 166 (Oualan); Kittlitz (part), Kupfertaf. Naturgesch. Vögel, 3, 1833, p. 25, pl. 23, fig. 1 (Ualan); _idem_ (part), Observ. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 284 (Ualan); Lesson, Compl. de Buffon, 2d ed., 2, Oiseaux, 1839, p. 292 (Oualan); Prévost and Knip (part), Les Pigeons, 2, 1838-43, p. 47, pl. 24 (Oualan); Bonaparte, Comptes Rendus Acad. Sci. Paris, 39, 1854, p. 1072 (Oualan); Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, pp. 39, 49, 62 (Ualan). _Carpohaga oceanica_ Hartlaub (part), Archiv f. Naturgesch., 18, 1852, pp. 115, 185 (Ualan); _idem_, Journ. f. Ornith., 1854, p. 168 (Carolinen = Kusaie); Hartlaub and Finsch (part), Proc. Zool. Soc. London, 1872, p. 101 (Ualan); Schlegel, Mus. Pays-Bas, 6, no. 35, 1873, p. 87 (Oualan); Salvadori (part). Cronaca del R. Liceo-Ginnasio Cavour, 1878, pp. 3, 8 (Oualan); Finsch (part), Ibis, 1880, pp. 220, 331, 332 (Taluit); _idem_ (part), Journ. f. Ornith., 1880, pp. 292, 304 (Kuschai); _idem_, Ibis, 1881, p. 108 (Kuschai); _idem_, Mitth. Ornith. Ver. Wien, 1884, p. 50 (Kuschai, Jaluit); Hartert, Katalog Vogelsamml, Senckenb., 1891, p. 190 (Ualan); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 52 (Ualan, Taluit); Matschie (part), Journ. f. Ornith., 1901, p. 113 (Ualan). _Globicera oceanica_ Bonaparte (part), Consp. Avium, 2, 1855, p. 31 (Oualan); _idem_, Comptes Rendus Acad. Sci. Paris, 43, 1856, p. 835 (Oualan); Reichenbach (part), Tauben, 1861, p. 120 (Oualan); Salvadori (part), Cat. Birds British Mus., 21, 1893, p. 176 (Kushai). _Carpophaga pacifica_ Finsch and Hartlaub (part), Fauna Centralpolynesiens, 1867, p. 145 (Ualan). _Carpophaga (Globicera) oceanica_ Gray (part), Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 41 (Oualan). _Globicera oceanica oceanica_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 191 (Kusaie); Momiyama (part), Birds Micronesia, 1922, p. 6 (Kusaie, Taluit); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 55 (Kusaie, Taluit); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 45 (Kusaie); Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 221 (Jaluit, Iringlob, Kusaie); Hand-list Japanese Birds, rev., 1932, p. 190 (Kusaie, Jaluit, Elmore). _Muscadivora oceanica oceanica_ Neumann (part), Verhandl. Ornith. Ges. Bayern, 25, 1922, p. 234 (Kushai). _Ducula Oceanica oceanica_ Peters, Check-list Birds World, 3, 1937, p. 44 (Kusaie, Jaluit, Elmore); Bequaert, Mushi, 12, 1939, p. 81 (Kusaie); _idem_, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 266 (Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 212 (Kusaie, Jaluit, Elmore); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 11 (Kusaie, Jaluit, Elmore); Mayr, Birds Southwest Pacific, 1945, p. 289 (Kusaie, Jaluit, Elmore). _Geographic range._--Micronesia: Caroline Islands--Kusaie; Marshall Islands--Jaluit, Elmore. _Characters._--Adult male: A large knob-billed pigeon with breast gray, washed with buff; head and neck dark gray; feathers at base of bill and on chin buff-white; abdomen and under tail-coverts near "burnt sienna," sides grayer; mantle, back, rump, upper tail-coverts, wings and tail bronze-green edged with a dark bluish sheen; under side of wing and under side of tail brown; bill and knob black; feet blackish-red; iris reddish-brown. Adult female resembles adult male but smaller and possibly a little darker bluish-green on back, wings, and tail. _D. o. oceania_ resembles _D. o. townsendi_, but is smaller with upper parts slightly darker and abdomen and under side of tail lighter. _Measurements._--Measurements are presented in table 27. _Specimens examined._--Total number, 47 (25 males, 22 females), as follows: Caroline Islands, USNM--Kusaie, 2 (Feb. 8, 9,); AMNH--Kusaie, 45 (Jan., Feb., March). _Parasites._--Bequaert (1939:81 and 1941:266) obtained the fly (Hippoboscidae) _Ornithoctona plicata_ from the pigeon at Kusaie. _Remarks._--The Micronesian Pigeon at Kusaie has been known since 1824, when from June 5 to June 15 of that year personnel from the corvette "La Coquille" visited the island and observed the bird. Kittlitz visited Kusaie and observed the pigeon in December, 1827, and January, 1828. Finsch (1880c and 1880d) found the bird in the Marshalls at Jaluit. Takatsukasa and Yamashina (1932:221) record the bird from Elmore in the Marshalls. Coultas (field notes) writes that the pigeon was numerous at Kusaie in 1931. He remarks that they appear stupid and are easily killed by the natives, who use a call to attract them. With regard to their habits he writes, "About four o'clock in the afternoon these birds begin congregating in the high trees of the lowlands close to the salt water where they roost for the night. At daybreak they begin migrating to the high mountain sides and peaks where they spend the time feeding." =Ducula oceanica ratakensis= (Takatsukasa and Yamashina) Micronesian Pigeon _Globecera oceanica ratakensis_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 221. (Type locality, Aruno.) _Columba australis_ Chamisso, in Kotzebue's, Voy. "Rurick," 3, 1821, p. 157 (Radak). _Carpophaga oceanica_ Finsch, Ibis, 1880, p. 331 (Arno); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 52 (Arno); _idem_, Ibis, 1893, p. 211 (Marshalls). _Globicera oceanica oceanica_ Momiyama (part), Birds Micronesia, 1922, p. 5 (Arno); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 55 (Arno). _Globicera oceanica ratakensis_ Hand-list Japanese Birds, rev., 1932, p. 190 (Arhno, Wotze); Mathews, Ibis, 1933, p. 87 (Aruno, Wozzie). _Ducala oceanica ratakensis_ Peters, Check-list Birds World, 3, 1937, p. 44 (Arno, Wotje); Hand-list Japanese Birds, 3d ed., 1942, p. 212 (Arhno, Wotze); Amadon, Amer. Mus. Novit., no. 1237, 1943, p. 12 (Arno, Wotje); Mayr. Birds Southwest Pacific, 1945, p. 289 (Arno, Wotje). _Geographic range._--Micronesia: Marshall Islands (Radak Chain)--Wotje, Arhno. _Characters._--Takatsukasa and Yamashina (1932:221) describe this subspecies as follows, "This form differs from all other forms of _Globicera oceanica_ by its smaller size, more bronze-sheen on the back, more vinaceous grey on the breast and duller brown on the abdomen." On examining two specimens from Arno in the collection of the Museum of Comparative Zoölogy, Amadon (1943:12) writes that he finds no distinguishing color characters between _D. o. oceanica_ and _D. o. ratakensis_. He also questions whether there is any difference in size between the two populations. _Measurements._--Measurements are listed in table 27. _Remarks._--Chamisso (1821), the naturalist on board the ship "Rurick," was the first person to write of the pigeon in the Radak Chain of the Marshall Islands. The ship visited this area in 1817. Finsch (1880b) published an account of the bird when he visited the area about 1880. Takatsukasa and Yamashina (1932:221) described this bird as new on the basis of an examination of nine skins taken at Arhno and Wotje. _Evolutionary history of Ducula oceanica in Micronesia._--The distribution and evolutionary history of _Ducula oceanica_ have been treated by Mayr (1940) and Amadon (1943). These authors place _D. oceanica_ within a superspecies containing _D. pacifica_ (Melanesia to Samoa and Cook Islands), _D. aurorea_ (Society Islands), _D. galeata_ (Marquesas Islands), and possibly other species in Papua and Malaysia. According to Mayr (1942b:fig. 7), _D. pacifica_ is the species which is ancestral to other species of pigeons in Oceania. Apparently _D. oceanica_ was derived from this ancestral stock and reached Micronesia via the Ellice and Gilbert islands. Records of _Ducula_ were obtained in the Gilbert Islands in the days of exploration; Amadon (1943:11) tentatively refers these to _D. o. oceanica_. The irregular distribution of _D. oceanica_ in the islands of Micronesia and the fact that the bird exists on both "high" volcanic islands as well as on "low" coral atolls suggest that the present population may be a remnant of a once more widely distributed one. The fact that _D. oceanica_ may be divided into several subspecies shows that a greater amount of geographic variation has occurred as compared with its probable ancestral stock, _D. pacifica_, which is virtually undifferentiated over most of its extensive range. The pigeon of Micronesia has a more rounded wing than that of _D. pacifica_, which might, as Amadon has suggested, cause the bird to be more sedentary and lend itself more readily to differentiation through geographic isolation. _D. pacifica_ is known to fly from island to island. As shown by the measurements in table 27, the length of wing of _D. oceanica_ differs, in the various insular populations, being longer in the west and shorter in the east. This cline has been discussed by Amadon (1943:11). It is interesting that _Ducula_ or some other large pigeon has not become established in the Mariana Islands. _Ducula_ is present at Yap and Truk, which are not very distant from Guam. Another tropical pigeon, _Columba vitiensis_, has extended its range northward and reached the Bonin Islands; probably it arrived there via the Philippines or the Riu Kiu Islands. Thus, there are representatives of large pigeons on islands to the southeast, south, west and northwest of the Marianas, but none has become established in the Marianas themselves. =Streptopelia bitorquata dusumieri= (Temminck) Philippine Turtle Dove _Columba dusumieri_ Temminck, Pl. col., livr. 32, 1832, p. 188. (Type locality, Vicinity of Manila, Luzon, Philippine Islands.) _Colombe Dussumier_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, pp. 35, 680 (Mariannes); _idem_, Ann. Sci. Nat. Paris, 6, 1825, p. 148 (Mariannes). _Columba dusumieri_ Wagler, Syst. Avium Columba, 1827, p. 266, sp. 99 (Marianis). _Columba Dussumieri_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 305 (Guahan). _Streptopelia gaimardi_ Bonaparte, Consp. Avium, 2, 1854, p. 66 (Type locality, Mariannes); _idem_, Comptes Rendus Acad. Sci. Paris, 40, 1855, p. 18 (Mariannes); Reichenbach, Tauben, 1862, p. 76 (Mariannen). _Turtur (Streptopelia) Giamardi_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 43 (Guam). _Turtur gaimardi_ Gray, Hand-list Birds, 2, 1870, p. 239 (Marian). _Turtur dussumieri_ Schlegel, Mus. Pays-Bas, 6, no. 35, 1873, p. 120 (Mariannes); Wiglesworth, Abhandl. Und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 54 (Marianne); Salvadori, Cat. Birds British Mus., 21, 1893, p. 423 (Mariannes); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 222 (Guam); Hartert, Novit. Zool., 5, 1898, p. 60 (Guam, Saipan); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 43 (Marianas); Safford, Osprey, 1902, p. 68 (Marianas); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 264 (Guam); Dubois, Syn. Avium, 2, 1904, p. 760 (Marianne); Safford, Contr. U. S. Nat. Herb., 9, 1905, p. 78 (Guam); Schnee, Zeitschr. f. Naturwisch., 82, 1912, p. 466 (Marianen); Prowazek, Die deutschen Marianen, 1913, p. 101 (Marianen); Reichenow, Die Vögel, 1, 1913, p. 341 (Marianen); Cox, Island of Guam, 1917, p. 20 (Guam). _Streptopelia dussumieri_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 54 (Guam, Saipan); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 62 (Marianas); Hand-list Japanese Birds, rev., 1932, p. 189 (Saipan, Tinian, Rota). _Tuttur dessumieri_ Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam). _Streptopelia bitorquata dusumieri_ Peters, Check-list Birds World, 3, 1937, p. 96 (Marianne); Hand-list Japanese Birds, 3d ed., 1942, p. 211 (Saipan, Tinian, Rota); Mayr, Birds Southwest Pacific, 1945, p. 289 (Marianas); Watson, The Raven, 17, 1946, p. 41 (Guam); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 96 (Tinian); Strophlet, Auk, 1946, p. 538 (Guam); Stott, Auk, 1947, p. 526 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 60 (Guam, Rota). _Streptopelia bitorquata_ Baker, Trans. 11th N. American Wildlife Conf., 1946, p. 208 (Guam); _idem_, Condor. 49, 1947, p. 125 (Guam). _Geographic range._--Philippine Islands, Sula Archipelago, northern Borneo. In Micronesia: Mariana Islands (introduced)--Guam, Rota, Tinian, Saipan. _Characters._--Adult: A medium-sized dove with head and nape near "light Quaker drab" with a vinous tinge; chin and upper throat whitish becoming near "vinaceous buff" on lower throat and to near "vinaceous-faun" on breast and upper abdomen; lower abdomen, vent, and under tail-coverts white; tibia grayish; neck feathers dark with grayish centers and metallic greenish-slate edges; color near "Japan rose"; back, rump, upper tail-coverts, scapulars, upper wing-coverts, and inner secondaries dark "drab"; sides, upper wing coverts, outer secondaries, and under wing-coverts lead colored; primaries blackish edged with light gray; central tail feathers like back but paler, outer feathers of tail darker with brownish tinge on edges; outermost tail feathers blackish tipped with gray and with outer webs whitish; bill dark; feet reddish; iris orange. _Measurements._--Measurements of 15 adult males from Guam, Rota and Tinian: wing, 154-162 (158); tail, 127-135 (130); culmen, 16.2-18.1 (17.2); tarsus, 24-27 (25.5); of 10 adult females from Guam and Rota: wing, 150-162 (156); tail, 120-130 (127); culmen, 16.2-19.1 (17.5); tarsus, 24-26 (25). No differences in measurements were found between populations from Guam, Rota and Tinian. _Weights._--The author (1948:61) reports the weights of five adult males as 130-167 (152) and of six adult females as 135-159 (146). These birds were taken at Guam. _Specimens examined._--Total number, 27 (16 males, 11 females), as follows: Mariana Islands, USNM--Guam, 21 (Feb. 7, May 25, 26, June 9, July 6, 7, 10, 18, 23, Aug. 2, 11, Sept. 8, Oct. 8)--Rota, 4 (Oct. 18, 22, 23, Nov. 2)--Tinian, 2 (Oct. 24, 25). _Nesting._--The NAMRU2 party found evidences of nesting by this dove at Guam in February, March, April, and June. Nests were observed on May 29 and June 28. On the latter date a nest containing one nestling and one unhatched egg was found near Mount Santa Rosa. The nest was situated approximately five feet from the ground in a low bush. Two eggs taken by Necker at Rota on October 31, 1945, are white and measure 29.6 by 23.0 and 30.1 by 23.0. Strophlet (1946:538) observed a bird carrying nest materials at Guam on November 13. Hartert (1898:60) reports on nests found at Guam in April and May. Each nest contained one egg. It is probable that this bird nests at all times of the year. The nuptial flight of these birds reminds one very much of that of the mourning dove of North America. _Remarks._--The Philippine Turtle Dove was introduced from the Philippines to Guam and other islands of the southern Marianas by the Spanish probably in the 18th Century; it was in 1771-1774 that the Philippine deer (_Rusa_) was introduced to Guam. Perhaps these birds were initially introduced as caged birds or possibly were liberated to offer hunting for the colonial governors. They have been a very successful introduction and are well established. At Guam (see Baker 1947b:124), this species comprised 15.5 percent of all birds seen along roadways. Although open areas appear to be preferred by this dove and although it may be on the increase owing to the clearing operations of the war effort, it appears to be equally adapted to forested areas and coconut groves. It feeds on the ground to a large extent, fitting into an ecologic niche which few other species of birds of the islands occupy. It was even observed feeding on sandy beaches and tidal flats at low tide. In 1931, Coultas found the dove to be numerous at Guam, but thought that it was in danger of extinction at Tinian and Saipan owing to extensive hunting. Downs (1946:96) reported that in 1945 the dove was abundant at Tinian. Gleise (1945:22) estimated the population of these doves at 300 on Tinian in 1945. From the remarks of Stott (1947:526), we may assume that the population at Saipan is in no immediate danger of extinction. A comparison of specimens from the Marianas with those from the Philippines reveals no significant difference between the two. Bonaparte described the dove in the Marianas as new, naming it _Streptopelia gaimardi_. The name _Turtur prevostianus_ has been used by some authors to denote the dove in the Marianas, but this was through error as explained by Salvadori (1893:410). This name refers to a dove found on Marianne, an island of the Seychelles in the Indian Ocean. =Gallicolumba canifrons= (Hartlaub and Finsch) Palau Ground Dove _Phlegoenas canifrons_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 101. (Type locality, Pelew Islands.) _Phlegoenas canifrons_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 27, pl. 5, fig. 1 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 57 (Pelew); Hartert; Novit. Zool., 5, 1898, p. 61 (Pelew); Matschie, Journ. f. Ornith., 1901, p. 113 (Palau); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 53 (Pelews). _Phlogoenas canifrons_ Sclater, Proc. Zool. Soc. London, 1877, p. 112 (Pelew); Salvadori, Ornith.] Papuasia, 3, 1882, p. 169 (Pelew); _idem_, Cat. Birds British Mus., 21, 1893, p. 592 (Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 227 (Palaos); Bolau. Mitteil. Naturhist. Mus. Hamburg, 1898, p. 68 (Palau); Dubois, Syn. Avium, 2, 1904, p. 772 (Pelew). _Phaps canifrons_ Giebel, Thes. Ornith., 3, 1877, p. 89 (Pelew). _Gallicolumba canifrons canifrons_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 74 (Pelew). _Gallicolumba canifrons_ Hand-list Japanese Birds, rev., 1932, p. 189 (Palau); Mayr, Amer. Mus. Novit., no. 828, 1936, p. 4 (Palau); Peters, Check-list Birds World, 3, 1937, p. 136 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 211 (Babelthuap); Mayr, Birds Southwest Pacific, 1945, p. 290 (Palau); Mayr, Audubon Mag., 47, 1945, p. 282 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 62 (Garakayo, Peleliu). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Ngabad, Angaur. _Characters._--Adult male: A small, ground dove with forehead, crown, sides of head, chin, throat, and breast ashy gray, lighter on forehead, chin, and throat, and washed with "light vinaceous-faun" on breast; occiput, nape and mantle dark "ferruginous"; rest of upper parts glossed with bronze-olive; lesser and middle wing-coverts tipped with metallic purple; wings reddish-brown with dark brown tips; under side of wing reddish-brown to brown; abdomen, vent and under tail-coverts dark grayish-brown; tail colored like back, outer feathers have a paler brown terminal band rather obscure; bill horn colored; feet red; iris brown. Female: A female molting into adult plumage is cinnamon colored, mottled with dark brown; on the back an olive-green sheen is beginning to appear; tail brown with some greenish sheen; tips of tail edged with light brown; bill and feet light brown. _Measurements._--Measurements of six adult males are: wing, 112-119 (115); tail, 65-72 (70); exposed culmen, 15.3-16.1 (15.7); tarsus, 30.1-31.2 (30.8); of one female in postjuvenal molt: wing, 107; tail, 69; exposed culmen, 17.1; tarsus, 30. _Specimens examined._--Total number, 8 (7 males, 1 female), as follows: Palau Islands, USNM--Koror, 1 (Nov. 18)--Garakayo, 2 (Sept. 17, 19)--Peleliu, 2 (Sept. 1, Dec. 5)--Ngabad, 1 (Sept. 11); AMNH--exact locality not given, 1 (Dec. 1). _Food habits._--Stomachs of specimens taken by the NAMRU2 party at Peleliu and Garakayo contained one and one-half to two cc. of hard seeds and seed parts. _Remarks._--The Palau Ground Dove, according to Amadon (1943:19), is a member of a superspecies containing _G. hoedti_ (Wetar), _G. beccarii_ (New Guinea, Bismarcks, Solomons), _G. sanctaecrucis_ (Santa Cruz, New Hebrides), and _G. stairi_ (central Polynesia). _G. canifrons_ apparently came to the Palaus from either New Guinea or the region of the Bismarck Archipelago, evolving from _G. beccarii_ or some related form. The Palau Ground Dove has a copper-colored occiput, nape, and shoulder patch, but otherwise it resembles this Melanesian species, _G. beccarii_. Amadon (1943:20) discusses two types of plumage of females in _G. stairi_; one is a male type of plumage. The lack of female specimens prevents me from determining whether this characteristic is present in _G. canifrons_. Coultas (field notes) had difficulty in obtaining even one specimen of _G. canifrons_ in the Palaus in 1931. He concluded that either the bird was practically extinct or that he just could not find it. From the experience of the NAMRU2 party in the southern Palaus in 1945, I would think that he merely did not find the bird. Although it is probably rare in comparison with some other members of the family Columbidae of these islands, we found this bird on most of the islands visited. The NAMRU2 party arrived at Palau expecting to find the ground dove a fairly conspicuous member of the avifauna and expecting to see it sitting in trees and flying across the roads much in the same manner as did the ground dove at Guam, _G. x. xanthonura_. At first, we did not find the bird, but in the dense jungles a low, penetrating, and intermittent, call was heard which may be described as a moan. This was the call of the ground dove. The bird was difficult to discover because its color blended so well with the shadows and dark background of the coral rocks and forest litter. The bird was very active and moved along rapidly pecking at food particles. Also it was wary. Once the distinctive call note was recognized, it was not difficult to locate the area in which the bird was living; however, finding the bird was difficult. On one occasion I stalked a dove for at least a half an hour knowing that it was always within fifty yards of me. A bird that was flushed, flew about twenty-five feet and dropped down in open forest litter and disappeared. On the basis of specimens collected and call notes heard, I estimate that the population of the Palau Ground Dove on the islands visited in 1945 was as follows: Peleliu--a minimum of 15 (found in most forested areas which were not greatly damaged by the invasion operations); Garakayo--a minimum of 10 (the doves were found to live equally well on the steep hillsides or in flat jungle on this islet); Ngabad--5 to 10 (doves were heard in several areas on this small islet); Angaur--not estimated (one call was heard in brush near the edge of a fresh water lake). =Gallicolumba xanthonura xanthonura= (Temminck) White-throated Ground Dove _Columba xanthonura_ Temminck, Pl. col., livr. 32, 1823, pl. 190. (Type locality, Mariannes.) _Columba xanthonura_ Lesson, Compl. de Buffon, 2nd ed., 2, Oiseaux, 1838, p. 281 (Mariannes). _Columba Pampusan_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, pp. 121, 681, pl. 30 (Mariannes); Dumont, Dict. Sci. Nat., ed. Levrault, 40, 1826, p. 345 (Guam); Lesson, Traité d'Ornith., 1831, p. 471 (Mariannes); Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen). _Columba erythroptera_ Lesson, Traité d'Ornith., 1831, p. 471 (Mariannes); Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 305 (Guahan); Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen). _Columba xanthura_ Prévost and Knip, Les Pigeons, 2, 1838-43, p. 45, pl. 23 (Guam). _Pampusana xanthua_ Bonaparte, Consp. Avium, 2, 1854, p. 89 (Mariannis); _idem_, Comptes Rendus Acad. Sci. Paris, 40, 1855, p. 207 (Mariannes); Reichenbach, Tauben, 1861, p. 39 (Guam). _Caloenas (Pampusana) xanthura_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 45 (Guam). _Phlegoenas erythroptera_ Reichenbach, Tauben, 1861, p. 41 (Mariannen). _Caloenas xanthura_ Gray, Hand-list Birds, 2, 1870, p. 247 (Marian). _Phlegoenas yapensis_ Hartlaub and Finsch, 1872, p. 102 (Type locality, Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, pp. 122, 123 (Yap); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 57 (Yap); Hartert, Novit. Zool., 5, 1898, p. 61 (Yap); Matschie, Journ. f. Ornith., 1901, p. 113 (Yap). _Pampusana rousseaui_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 103 (Marianne). _Phaps erythroptera_ Giebel (part), Thes. Ornith., 3, 1877, p. 89 (Marianne). _Phaps xanthura_ Giebel, Thes. Ornith., 3, 1877, p. 91 (Marianne). _Phaps yapensis_ Giebel, Thes. Ornith., 3, 1877, p. 91 (Uap). _Phlegoenas virgo_ Reichenow. Journ. f. Ornith., 1885, p. 110 (Type locality, Palau-Inseln, error = Guam). _Phlogaenas erythroptera_ Oustalet, Le Nat., 1889, p. 261 (Mariannes). _Phlegoenas pampusan_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 55 (Marianne); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 224 (Saypan, Guam, Rota). _Phlogoenas yapensis_ Salvadori, Cat. Birds British Mus., 21, 1893, p. 593 (Uap); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 227 (Mackensie); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 68 (Yap); Dubois, Syn. Avium, 2. 1904, p. 772 (Uap). _Phlogoenas pampusan_ Salvadori, Cat. Birds British Mus., 21, 1893, p. 602 (Marianne). _Phlegoenas xanthonura_ Hartert, Novit. Zool., 5, 1898, p. 60 (Guam, Saipan); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Matschie, Journ. f. Ornith., 1901, p. 113 (Guam, Saipan); Safford, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, Osprey, 1902, p. 68 (Mariannas); _idem_, The Plant World, 7, 1904, p. 264 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 78 (Guam); Cox, Island of Guam, 1917, p. 20 (Guam). _Phlogoenas xanthonura_ Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 42 (Marianas); Reichenow, Die Vögel, 1, 1913, p. 331 (Mariannen); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 24 (Guam). _Phlegoenas xanthonura xanthonura_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 54 (Guam, Rota, Saipan). _Phlegoenas xanthonura yapensis_ Kuroda, in Momoyama, Birds Micronesia, 1922, p. 54 (Yap). _Gallicolumba xanthonura_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 75 (Marianas, Mackenzie); Hand-list Japanese Birds, rev., 1932, p. 189 (Pagan, Almagan, Saipan, Tinian, Rota, Mackenzie); Mayr, Amer. Mus. Novit., no. 828, 1936, p. 4 (Marianne); Peters, Check-list Birds World, 3, 1937, p. 136 (Marianne, Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 211 (Yap, Assongsong, Pagan, Almagan, Saipan, Tinian, Rota); Strophlet, Auk, 1946, p. 538 (Guam); Wharton, Ecol. Monogr., 16, 1946, p. 174 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam). _Gallicolumba canifrons yapensis_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 74 (Yap). _Terricolumba xanthonura_ Yamashina, Tori, 10, 1940, p. 677 (Assongsong). _Gallicolumba xanthonura xanthonura_ Mayr, Birds Southwest Pacific, 1945, p. 290 (Marianas, Yap); Watson, The Raven, 17, 1946, p. 41 (Guam); Stott, Auk, 1947, p. 526 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 61 (Guam, Rota Yap). _Gallecolumba xanthonura xanthonura_ Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 96 (Tinian). [Illustration: FIG. 14. Geographic distribution of _Gallicolumba_ of Micronesia and Eastern Polynesia and routes of its dispersal. (1) _G. jobiensis_; (2) _G. x. kubaryi_; (3) _G. x. xanthonura_; (4) _G. erythroptera_; (5) _G. rubescens_.] _Geographic range._--Micronesia: Mariana Islands--Asuncion, Pagan, Almagan, Saipan, Tinian, Rota, Guam; Caroline Islands--Yap. _Characters._--Adult male: Forehead, face, chin, throat, and upper breast white, lightly washed with pale buff; crown, occiput, sides of head, and nape rusty brown to dark brown; rest of upper parts dark bronze-olive; feathers of mantle and upper wing-coverts broadly edged with metallic purple-violet; primaries, under wing-coverts and axillaries brown; tail, lower breast and rest of underparts dark brown; bill and feet dark brown. Adult female: Resembles adult male, but smaller and with underparts colored between "ochraceous-tawny" and "cinnamon brown" instead of dark brown and white; head and neck darker and with more rufous than underparts; remainder of upper surface resembles underparts but with striking olive green sheen, especially on upper wing-coverts; primaries brown but outer webs lighter; tail rufous-brown, with a broad, black subterminal band. The male type of plumage in the adult female is: breast light drab tinged with light brown and darkening anteriorly; crown resembles that of normal female although darker and becoming lighter and grayer on neck and nape; shoulder and wing-coverts compare favorably with that of adult male although lighter and with yellowish tinge; back bronzed olive-green as in normal female but mantle with a few purplish feathers characteristic of male; abdomen near "olive brown" with buffy-brown edges to feathers. Immature male: Resembles adult male, but head and nape darker brown; throat and upper breast may be more brown and less white. Immature female: Resembles adult female, but with more rufous coloring; olive-green sheen on feathers reduced in amount or absent. _Measurements._--Measurements are found in table 28. TABLE 28. MEASUREMENTS OF _Gallicolumba xanthonura_ ===================+==========+=========+========+===========+======== SUBSPECIES | Number | Wing | Tail | Culmen | Tarsus -------------------+----------+---------+--------+-----------+-------- _G. x. xanthonura_ |43 males | 146 | 102 | 22.0 | 32 | |(139-153)|(97-111)|(21.0-23.0)| (31-33) | | | | | |31 females| 136 | 94 | 20.5 | 30 | |(131-141)|(90-98) |(20.0-21.5 | (28-32) | | | | | _G. x. kubaryi_ | 7 males | 157 | | 23.0 | 35 | |(152-160)| |(20.5-23.5)| (33-35) | | | | | | 7 females| 148 | | 23.0 | 33 | |(145-151)| |(22.5-23.5)| (32-34) -------------------+----------+---------+--------+-----------+-------- There is little difference in the measurements of specimens from Guam, Rota, Tinian, Saipan, and Asuncion. No specimens from Yap were available for examination. _Weights._--The NAMRU2 party obtained weights of this ground dove from Guam as follows: seven adult males 119-154 (130); seven adult females 96-150 (118). _Specimens examined._--Total number, 96 (50 males, 38 females, 8 unsexed) as follows: Mariana Islands, USNM--Guam, 29 (Mar. 18, April 4, 17, May 20, 28, June 2, 9, 13, 14, 15, 20, 23, 24, 27, 28, July 2, 6, 10, 23, Aug. 11, 21)--Rota, 6 (Oct. 20, 22, 25, 26, Nov. 1, 2)--Tinian, 4 (Oct. 24, 26); AMNH--Guam, 40 (Jan. 17, 30, Feb. 12, 20, March 3, 5, 7, 11, 13, 23, April 13, 19, June 13, 15, July 10, 25, Aug. 4, 10, 11, 13, 15, 18, 20, 21, 22, Sept. 4, Dec. 26, 30)--Tinian, 8 (Sept. 7, 10, 11, 12, 13)--Saipan, 6 (July 13, 15, Aug. 24, Sept. 7, 8)--Asuncion, 3 (Jan. 18, Feb. 7, June). _Nesting._--The NAMRU2 party found the ground dove nesting at Guam in the winter and spring months beginning in late January. Nests were observed in tall trees, many of which were well isolated from other trees and vegetation. On February 10 a nest was discovered in a breadfruit tree near one of the NAMRU2 barracks on Oca Point. It was approximately 50 feet above the ground. On February 26 I found pieces of egg shell beneath the tree. Occasionally during the day, the male, but never the female, was observed sitting on this nest. On February 10, a dove (the male) was observed building a nest in a large banyan tree at Oca Point. Another nest was being constructed by a female on March 7. On March 17 a young female dove, just beginning to fly, was taken; another was found on April 3. Adult birds with enlarged gonads were taken in April, May, June, and July. Marche, according to Oustalet (1895:224), obtained eggs in May, 1887. _Food habits._--Stomachs of doves taken at Guam contained fruits and fruit parts. On March 9, a dove was observed feeding on the berries of the shrub known as "inkbush." This appeared to be a favorite food. Seale (1901:42) also mentions that this berry is a preferred food. _Parasites._--Wharton (1946:174) lists the chigger (Acarina), _Trombicula_ sp., from the ground dove at Guam. _Remarks._--At Guam, the NAMRU2 party observed the ground dove to be fairly common in 1945. Along roadways, the present author (1947b:124) found that individuals of this species comprised 2.5 percent of the total population of birds observed, and the ground dove was seen on 31.2 percent of 125 road counts made. The male was much more in evidence than the female and was frequently seen flying high over the roadways and jungle areas; eighty percent of the ground doves seen while road-counts were being made were males. The female was found less frequently; it was a less conspicuous bird and was seen only occasionally in flight. Neither sex appeared to have the secretive, terrestrial habits of _G. canifrons_ of the Palau Islands. On the basis of our observations at Guam, I would say that the name "ground dove" for the bird at Guam is not descriptive. The birds were found to spend considerable time in tall trees; the closest that I saw them to the ground was when they were feeding only three to four feet from the ground in the ink berry bushes. The call note of this dove is much like that of the Palau Ground Dove; Seale (1901:42) describes it as follows, "These pigeons seem to prefer the deep jungle, from whence their deep low moan, like the sound of a man dying in great distress, comes with a weird uncanny effect, heightened by the gloom and darkness of the unknown forest.... This sound, which always seems to come from a long distance, is very misleading, and one is considerably surprised to find he is perhaps within a few feet of the bird." Seale writes that they were very common on Guam in 1900. In 1931, Coultas found the dove "quite common at the north end of the island." The bird apparently prefers the dense forest or second growth brushy areas, but was found also in the partly cleared areas surrounding the NAMRU2 headquarters at Oca Point in 1945. At Rota, the NAMRU2 party found the birds to be numerous in 1945. Coultas observed only a few birds on Tinian in 1931; Downs (1946:96) found only a small population at this island in 1945. The extensive cultivation and clearing activities at Tinian have removed much of the habitat suitable for these, as well as other birds. At Saipan, Stott (1947:526) writes that the bird is common on "brush-covered hillsides and semi-wooded country." There is little information published regarding the status of this dove in the northern Marianas. =Gallicolumba xanthonura kubaryi= (Finsch) White-throated Ground Dove _Phlegoenas Kubaryi_ Finsch, Journ. f. Ornith., 1880, p. 292. (Type locality, Ruck and Ponapé.) _Phlegoenas erythroptera_ Bonaparte, Consp. Avium, 2, 1854, p. 89 (Carolines); Reichenbach, Tauben, 1862, p. 41 (Carolines); Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 780 (Ponapé); _idem_, Ibis, 1881, p. 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 353 (Ponapé, Ruk); Tristram, Cat. Birds, 1889, p. 41 (Ruk). _Phlegoenas kubaryi_ Reichenow and Schalow, Journ. f. Ornith., 1881, p. 75 (Ruk, Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 55 (Ruk, Ponapé); Hartert, Novit. Zool., 7, 1900, p. 8 (Ruk, Ponapé); Matschie, Journ. f. Ornith., 1901, p. 113 (Ruck, Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 53 (Ruk, Ponapé). _Phlogoenas erythroptera_ Finsch, Proc. Zool. Soc. London, 1880, p. 576 (Ponapé, Ruk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Ruk). _Phlogoenas kubaryi_ Salvadori, Cat. Birds British Mus., 21, 1893, p. 599 (Ruk, Ponapé); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 227 (Caroline = Truk); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 68 (Ruck); Reichenow, Die Vögel, 1, 1913, p. 331 (Karolinen). _Phlegaenas kubaryi_ Christian, The Caroline Islands, 1899, p. 357 (Ponapé). _Gallicolumba kubaryi_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 74 (Caroline Is.); Hand-list Japanese Birds, rev., 1932, p. 189 (Truk, Ponapé); Peters, Check-list Birds World, 3, 1947, p. 136 (Ruk, Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé); Bequaert, Mushi, 12, 1939, p. 81 (Ponapé); _idem_, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 266 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 211 (Truk, Ponapé). _Gallicolumba xanthonura kubaryi_ Mayr, Birds Southwest Pacific, 1945, p. 290 (Truk, Ponapé); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 62 (Truk). _Geographic range._--Micronesia: Caroline Islands--Truk, Ponapé. _Characters._--Adult male: Resembles adult male of _G. x. xanthonura_, but larger with crown, nape, and hind neck sooty-black; upper back and lesser upper wing-coverts purplish-violet, extending lower on back than in _G. x. xanthonura_. Adult female: Resembles adult male, but smaller and paler with upper back glossy, bronze-green margined with purplish-violet; lower back and rump glossy, olive-green; upper tail-coverts greenish-brown; central tail feathers blackish-brown; innermost secondaries bright, glossy green tinged with bluish. _Measurements._--Measurements are presented in table 28. _Specimens examined._--Total number, 21 (9 males, 11 females, 1 unsexed), as follows: Caroline Islands, USNM--Truk, 1 (July); AMNH--Ponapé, 13 (Nov., Dec.)--Truk, 7 (Jan., Feb., May). _Nesting._--At Ponapé in November and December, Coultas obtained specimens which had enlarged gonads. He did not find the nest of this bird but writes (field notes) that the natives told him that the nest is placed in the top of the tree fern 10 or 15 feet above the ground. In contrast, the ground dove at Guam may select a nesting site considerably higher in the tree. Coultas reports that one egg is laid by _C. x. kubaryi_. _Food habits._--Coultas (field notes) writes that the bird feeds and lives on the ground at Ponapé. He lists food as small snails, seeds, and worms. _Parasites._--Bequaert (1939:81 and 1941:266) records the fly (Hippoboscidae), _Ornithoctona plicata_, from the ground dove at Ponapé. _Remarks._--Coultas (field notes) writes that in 1930 the ground dove at Ponapé was rare in the forested areas and generally found more along the sea coast and in the upland valleys. Coultas describes its call as an infrequent shrill, whistle-like call. He writes that hunting by the Japanese and natives was reducing the population of _G. x. kubaryi_ at Ponapé in 1930. In 1945, McElroy of the NAMRU2 party found the dove at Truk on forested slopes in tall trees, and reported that its habits at Truk were similar to those of _C. x. xanthonura_ at Guam. In 1947-1948, Richards noted (_in litt._) that the dove at Ponapé was rare (he saw only one specimen). At Truk, he found the bird to be "rather common" in thickets, dry gullies, and flying over grassy slopes. He found the bird near sea level, never in country above 300 feet in altitude and not in deep forest. I offer no explanation for the conflicting reports concerning the habits of this species, unless it be that the bird is capable of varying its habits to fit particular habitats; for example, in jungle areas it may be ground-living and in open woodlands it may be tree-living. _Evolutionary history of Gallicolumba in Micronesia._--There have been two unrelated invasions of Micronesia by the genus _Gallicolumba_. One invasion established _G. canifrons_ at the Palau Islands. The other established the populations of _G. xanthonura_ in the Caroline and Mariana islands, Mayr (1936:4) points out that _G. xanthonura_ is related to _G. jobiensis_ (New Guinea and Northern Melanesia), _G. erythroptera_ (Society and Tuamotu islands), and _G. rubescens_ (Marquesas Islands). This group may be regarded as a superspecies. The adults of _G. jobiensis_, the male and female, resemble one another. In both, the head, neck, and auriculoloral stripes are sooty-black; the eye stripe, chin, throat, and breast are white; the abdomen is dark; and the upper parts are blackish with a coppery sheen. Immatures are rusty-brown. _G. xanthonura_ is closely related to _G. jobiensis_, and they conceivably, along with _G. erythroptera_, might be considered conspecific. The close relationship between the _G. xanthonura_ in Micronesia and _G. erythroptera_ has been noted by Oustalet (1896:71). Among named kinds, _G. x. kubaryi_ most closely resembles _G. jobiensis_ with sooty-black coloring present on the head. The male and female of _G. x. kubaryi_ closely resemble each other, although immature type of plumage may occur in adult females as indicated by the immature plumage of a bird containing well-developed eggs taken at Ponapé by Coultas. In _G. x. xanthonura_ the male lacks the sooty-black head and has lost some of the coppery sheen from the middle of the back. The female has taken on the immature type of plumage, except for occasional near-male type plumage. In _G. erythroptera_ the male has lost some of the sooty-black coloring on the forehead, anterior crown, and loral area and some of the coppery sheen in the middle of the back. The female of _G. erythroptera_ resembles the female of _G. x. xanthonura_ except that the throat and breast are faintly outlined by the brownish color. The head and malar stripe are also outlined in this manner. Some females have some coppery gloss on the shoulder and a few white feathers on the breast; these may be considered as in the near-male type of plumage. The tendencies in the evolution of these insular populations of _Gallicolumba_ include a reduction of sooty-black on the head and a reduction of coppery gloss on the back of the male and the reduction of malelike plumage in the female. _G. rubescens_ of the Marquesas Islands is smaller and darker. It retains the coppery gloss on the back and has, in addition, a white bar on the tail and one on the wing. On the basis of color and structural characters, it is apparent that this superspecies of _Gallicolumba_ has evolved from a center of evolution in the region of New Guinea (as shown in figure 14) with a colonization of Micronesia, from which (probably from _G. x. kubaryi_) an invasion of eastern Polynesia occurred establishing _G. erythroptera_ in the Society and Tuamotu islands, although it is also possible that _G. erythroptera_ may have reached Polynesia by way of a more direct route from Melanesia. Such a pathway of colonization as that just described is not unusual since representatives of other genera including _Acrocephalus_, _Myzomela_, and _Zosterops_ may have followed similar paths of dispersal from Micronesia into Polynesia. Apparently a population isolated in the Marquesas has evolved the distinctive _G. rubescens_. =Caloenas nicobarica pelewensis= Finsch Nicobar Pigeon _Caloenas nicobarica_ var. _pelewensis_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 159 (in reprint p. 27). (Type locality, Palau.) _Caloenas nicobarica pelewensis_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 77 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 188 (Palau); Peters, Check-list Birds World, 3, 1937, p. 139 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 210 (Babelthuap, Koror); Mayr, Birds Southwest Pacific, 1945, p. 291 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 62 (Garakayo). _Caloenas nicobarica_ Salvadori, Ornith. Papuasia, 3, 1882, p. 211 (Pelew); Wiglesworth, Abhandl. und. Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 57 (Pelew). _Caloenas pelewensis_ Salvadori, Cat. Birds British Mus., 21, 1893, p. 618 (Pelew); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 69 (Palau); Matschie, Journ. f. Ornith., 1901, p. 113 (Palau); Reichenow, Die Vögel, 1, 1913, p. 328 (Palauinseln); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Pelew). _Caloenas nicobaricus pelewensis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 53 (Pelew). _Geographic range._--Micronesia: Palau Islands-Babelthuap, Koror, Garakayo. _Characters._--Adult: A large heavy-bodied pigeon with head, neck, and upper breast blackish; rest of plumage metallic bluish-green with coppery sheen; wings glossy green; tail and under tail-coverts white; feathers of hind-neck long and lanceolate; bill heavy and slightly hooked with lump at base. Resembles _C. n. nicobarica_ (Linnaeus), but slightly smaller and with upper parts metallic bluish-green and underparts darker and less green. _Measurements._--One adult female measures: wing, 232; tail, 82; culmen, 31; tarsus, 44; one immature female: wing, 236; tail, 89; culmen, 32; tarsus, 45. _Specimens examined._--Total number, three females from Palau Islands, AMNH--exact locality not given (undated). _Remarks._--_C. nicobarica_ is distributed from the Nicobar Islands east through Malaysia to Melanesia as a single undifferentiated form. In the northeasternmost part of its range, in the Palau Islands, it exhibits geographic variation and is considered to be subspecifically distinct from the rest of the population. _C. nicobarica_ appears to have no close relatives. It may represent the last remnant of some ancient group of pigeons. The Nicobar Pigeon is rare. Coultas, who visited the islands in 1931, did not obtain the bird. The only specimens available for study are those in the collections of the American Museum of Natural History taken by Kubary in the period between 1870 and 1880. The NAMRU2 party did not obtain specimens but saw the bird on five occasions at the island of Garakayo in the middle Palaus. The writer expected the bird to be ground-living in habit, but the individuals, which I saw at Garakayo, were either perched on scrubby vegetation on high and inaccessible cliffs or were flying high overhead. In its flight overhead, the short, white tail was a particularly conspicuous mark of identification. The flight reminded me very much of that of the Black Vulture (_Córagyps atrátus_) of North America. No birds were found at Peleliu or Angaur, and the small population of this pigeon that remains is probably restricted to uninhabited coral islets, as Mayr (1945a:291) has already noted. Marshall (1949: 207) saw one bird on Peleliu and one on Koror in November and December, 1945. This endemic subspecies is probably on the road to extinction unless governmental protection can be established and enforced. =Trichoglossus rubiginosus= (Bonaparte) Ponapé Lory _Chalcopsitta rubiginosus_ Bonaparte, Comptes Rendus Acad. Sci. Paris, 30, February, 1850, p. 134; Consp. Avium, 1, after April 15, 1850, p. 3. (Type locality, "ex Insulis Barabay et Guebe," error = Ponapé.) _Chalcopsitta rubiginosus_ Bonaparte, Proc. Zool. Soc. London, 1850, p. 26, pl. 16 ("Ins. Barabay et Guebe," error = Ponapé); Pelzeln, Reise "Novara," Vögel, 1865, pp. 99, 162 (Puynipet); Reichenow, Journ. f. Ornith., 1881, p. 162 ("Nordwestl. Polynessische subregion Carolinen" = Ponapé); Tristram, Cat. Birds, 1889, p. 73 (Ponapé); Finsch, Deut. Verein zum Schultze der Vogelwelt, 18, 1893, p. 458 (Carolinen = Ponapé); Matschie, Journ. f. Ornith., 1901, p. 112 (Ponapé). _Domicella rubiginosa_ Finsch, Die Papageien, 2, 1868, p. 781 (Puynipet); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 88 (Puinipet). _Lorius rubiginosus_ Gray, Hand-list Birds, 2, 1870, p. 153 (Puynipet); Schlegel, Mus. Pays-Bas, 3, no. 38, 1874, p. 58 (Puynipet). _Lorius rubiginosa_ Giebel, Thes. Ornith., 2, 1875, p. 502 (Senjawin = Ponapé). _Trichoglossus rubiginosus_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 17, 18 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); _idem_, Journ. f. Ornith., 1880, p. 284 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Finsch, Ibis, 1881, pp. 110, 111, 114 (Ponapé); _idem_, Mitth. Ornith. Ver. Wien, 1884, p. 49 (Ponapé); Hartert, Kat. Vogelsamml. Senckenb., 1891, p. 161 (Puypinet); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6 1890-1891 (1891), p. 8 (Ponapé); Peters, Check-list Birds World, 3, 1937, p. 151 (Ponapé); Mayr, Proc. Sixth Pac. Sci. Congr., 4, 1941, p. 204 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 201 (Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 291 (Ponapé). _Eos rubiginosa_ Salvadori, Ornith. Papuasia, 1, 1880, p. 267 (Puynipet); _idem_, Cat. Birds British Mus., 20, 1891, p. 29 (Ponapé); Christian, The Caroline Islands, 1899, p. 357 (Ponapé); Finsch, Notes Leyden Mus., 22, 1900, p. 142 (Ponapé); Dubois, Syn. Avium, 1902, p. 29 (Puinipet); Uchida, Annot. Zool. Japon., 9, 1918, pp. 484, 493 (Ponapé); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 192 (Ponapé). _Chalcopsittacus rubiginosus_ Finsch, Sammlung wissensch. Vorträge, 14th Ser., 1900, p. 639 (Ponapé). _Oenopsittacus rubiginosus_ Reichenow, Die Vögel, 1, 1913, p. 443 (Karolinen = Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 58 (Ponapé); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 295 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 181 (Ponapé). _Eos rubiginosus_ Takastukasa and Kuroda, Tori, 1, 1915, p. 53 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: A medium-sized, dark raspberry-red lory with head and nape deep purplish-red; upper back, scapulars, and upper wing-coverts raspberry-red, edged with blackish; lower back, rump, and upper tail-coverts more purplish; tail yellowish-green becoming more yellow and less green toward tip; wings black with outer webs olivaceous-green; outer edges of primaries more yellowish; lores, chin, auriculars, sides of head, and neck deep purplish-red, chin feathers faintly barred with raspberry and edged with blackish; throat, breast, abdomen, and flanks raspberry-red, feathers edged with blackish except on lower abdomen; under tail-coverts orange-red, under wing-coverts deep purple with black edges; bill of male orange, of female paler yellow; feet black; iris of male light yellowish-orange, of female grayish-white. Immature: Resembles adult, but with narrow and more sharply pointed tail feathers. _Measurements._--Measurements are presented in table 29. TABLE 29. MEASUREMENTS OF _Trichoglossus rubiginosus_ ===============+=====+===========+===========+=========+========= | | | | Culmen | Sex | No. | Wing | Tail | from | Tarsus | | | | cere | ---------------+-----+-----------+-----------+---------+--------- Adult males | 18 | 147 | 105 | 20 | 16 | | (143-153) | (100-110) | (19-20) | (15-17) | | | | | Adult females | 13 | 142 | 101 | 19 | 16 | | (141-146) | (98-104) | (18-19) | (15-17) ---------------+-----+-----------+-----------+---------+--------- _Specimens examined._--Total number, 31 (18 males, 13 females), as follows: Caroline Islands, USNM--Ponapé, 2 (Feb. 12); AMNH--Ponapé, 29 (Nov.). _Nesting._--According to Coultas (field notes) the nest is placed in the top of a coconut tree or in a hollow of a large forest tree. He says that one egg is laid, but does not record dates of nesting. Four of the birds taken by Coultas at Ponapé in November had swollen gonads. _Molt._--Specimens taken in November by Coultas were either in fresh plumage or were completing the molt when obtained. _Parasites._--Uchida (1918:484, 493) found the bird lice (Mallophaga), _Psittaconirmus harrisoni_ and _Eomenopon denticulatus_, on the Ponapé Lory. _Remarks._--There is little written information concerning the habits of the Ponapé lory. Mayr (1945a:291) describes the bird as being "very noisy" and with "habits apparently similar to _T. haematodus_." Coultas made a number of observations on this species; some of these unpublished notes are essentially as follows: _Trichoglossus_ is common on Ponapé. It is found everywhere on the island, preferring the coconut palms; it is noisy and quarrelsome. The parrot travels usually in small groups of two to six or eight birds, keeping up a continuous chatter all of the time. This chatter quiets down into a very pleasant-sounding crooning-tone after sunset. _Trichoglossus_ is a continual nuisance to the hunter, inquisitive and easily attracted by the slightest noise, to which the bird responds with a frantic yapping that frightens everything within a radius of a mile. One sometimes finds a bird alone working quietly about among the low trees of the high mountain ridges. The natives' name for the bird, "se ridt," means "always hide out in rain." The bird stays under a big leaf and keeps dry during the rain. This lory is intelligent, easily tamed, and sometimes learns to repeat a few words. _Evolutionary history of Trichoglossus rubiginosus._--The Ponapé Lory is the only native parrot in Micronesia. It is an aberrant species and seemingly is of long residence on the island, as indicated by its differences from related forms to the southward and southwestward. The bird shows some relationships to _T. ornatus_ (Linnaeus) of Celebes, but the plumage of _T. rubiginosus_ lacks the brilliant red, green, and yellow of this bird. The plumage of the Ponapé Lory is also softer in texture; this is a character exhibited also by other Micronesian birds, for example, _Cleptornus_ and _Colluricincla_. _T. rubiginosus_ and _T. ornatus_ correspond, however, in having the feathers of the breast edged with blackish. _T. rubiginosus_ resembles also _T. flavovirides_ of Celebes and Sula in that the edges of the feathers of the breast are dark, no markings are present on the inner web of the wing, and feathers of the upper back are edged with dark coloring. _T. rubiginosus_ may have been derived from either of these two species; however, it shows a close relationship also to the _T. haematodus_ group from the Papuan region. In any case, the Ponapé Lory, isolated in Micronesia, has not the multicolored plumage of its relatives and has, instead, a rather uniformly colored plumage. The presence of this parrot at only a single island in Micronesia is difficult to explain; perhaps at one time the bird was more widely distributed in Micronesia, or it may be that the population represents a single successful invasion to Ponapé. Like _Aplonis pelzelni_, another endemic species at Ponapé, this lory may have reached the island as a straggler, perhaps being carried north by the prevailing winds in the post-nesting season. =Cuculus canorus telephonus= Heine Common Cuckoo _Cuculus telephonus_ Heine, Journ. f. Ornith., 1863, p. 332. (Type locality, Japan.) _Cuculus canorus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 100 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 12 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 10 (Pelew); Takatsukasa and Kuroda, Tori, 1, 1915, p. 63 (Pelew). _Cuculus canorus telephonus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 57 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 181 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 201 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in northeastern Asia and Japan. Winters south to India, Malaysia, and Melanesia. In Micronesia: Palau Islands--exact locality not given. _Remarks._--The Common Cuckoo is a straggler on winter migration to the Palau Islands. =Cuculus saturatus horsfieldi= Moore Oriental Cuckoo _Cuculus horsfieldi_ Moore, in Moore and Horsfield, Cat. Birds Mus. Hon. East-India Co., 2, 1856-58 (1857), p. 703. (Type locality, Java.) _Cuculus striatus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 100 (Pelew); Finsch. Journ. Mus. Godeffroy, 8, 1875, pp. 4, 12 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 63 (Pelew). _Cuculus intermedius_ Wiglesworth. Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 10 (Pelew). _Cuculus optatus optatus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 57 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 181 (Palau). _Cuculus saturatus horsfieldi_ Hand-list Japanese Birds, 3d ed., 1942, p. 201 (Babelthuap, Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in eastern Asia and Japan. Winters south to India, Malaysia, and Melanesia. In Micronesia: Palau Islands--Babelthuap, Koror. _Remarks._--The Oriental Cuckoo reaches the Palau Islands as a winter visitor. On November 11 and 25 of 1931, Coultas obtained four immature birds at Palau near taro swamps. The natives told him that the cuckoo visited the islands each year from December to June. On September 21 at Angaur the NAMRU2 party saw one bird which may have been this cuckoo. =Eudynamis taitensis= (Sparrman) Long-tailed New Zealand Cuckoo _Cuculus taitensis_ Sparrman, Mus. Carls., fasc, 2, 1787, pl. 32. (No type locality = Tahiti.) _Eudynamis tahitiensis_ Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap). _Eudynamis taitiensis_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 49 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, pp. 17, 20 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); _idem_, Journ. f. Ornith., 1880, pp. 284, 298 (Ponapé, Kuschai, Palaos, Marshalls); _idem_, Ibis, 1880, pp. 331, 332 (Taluit); _idem_, Ibis, 1881, pp. 104, 108, 113, 114 (Kushai, Uleai, Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 281, 299, 353 (Ponapé, Mortlock, Ruk); Christian, The Caroline Islands, 1899, p. 358 (Ponapé). _Urodynamis taitensis_ Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 53 (Jaluit, Ponapé, Palau); Bogert, Amer. Mus. Novit., no. 933, 1937, p. 9 (Palau, Ruk, Kusaie, Ponapé, Truk, Iringlove, Wozzie, Auru, Jaluit, Ratak); Peters, Check-list Birds World, 4, 1940, p. 40 (Palaus, Carolines, Marshall); Hand-list Japanese Birds, 3d ed., 1942, p. 201 (Palau, Truk, Lukunor, Ponapé, Kusaie, Jaluit, Elmore, Aurh, Wotze). _Urodynamis taitiensis_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 11 (Pelew, Ualan, Ponapé, Luganor, Taluit); _idem_, Ibis, 1893, p. 212 (Marshalls); Hartert, Novit. Zool., 7, 1900, p. 7 (Ruk); Finsch, Notes Leyden Mus., 22, 1900, p. 120 (Ponapé, Palau, Kuschai, Ruk, Mortlock, Uleai, Jaluit); Takatsukasa and Kuroda, Tori, 1, 1915, p. 52 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 58 (Pelew, Ualan, Ponapé, Luganor, Ruk, Taluit); Hand-list Japanese Birds, rev., 1932, p. 180 (Palau, Kusaie, Ponapé, Luganor, Truk, Jaluit, Elmore, Aurh, Wotze). _Urdynamis taitiensis_ Finsch, Sammulung wissensch. Vorträge, 14th ser., 1900, p. 659 (Palau). _Eudynamis taitiensis_ Schnee, Zool. Jahrbücher, 20, 1904, p. 389 (Marshalls); Mayr, Birds Southwest Pacific, 1945, p. 302 (Micronesia). _Geographic range._--Breeds in New Zealand and adjacent islands. Winters chiefly in Polynesia, also Melanesia and Micronesia. In Micronesia: Palau Islands--exact locality unknown; Caroline Islands--Yap, Lukunor, Truk, Ponapé, Kusaie; Marshall Islands--Jaluit, Elmore, Auru, Wotze, Bikini. _Characters._--Adult: A large, long-tailed cuckoo with upper parts dark brown; top of head spotted with white; wings, upper back and tail barred with rufous; underparts pale rufous or buffy-rufous with shafts of feathers streaked with brown. _Specimens examined._--Total number, 4 (2 males, 2 females), as follows: Caroline Islands, AMNH--Truk, 1 (Jan. 7)--Kusaie, 2 (March); Marshall Islands, USNM--Bikini, 1 (May 1). _Remarks._--Bogert (1937) has summarized the information known concerning the migration of the New Zealand Long-tailed Cuckoo. Its principal winter range is in eastern and central Polynesia: Fiji, Samoa, Tonga, Union, Cook, Society, and Tuamotu islands. The bird reaches the northern extent of its range in the Marshall and Caroline islands (see map in Bogert, 1937:3-4). There are no records for the Marianas and only one record from the Palaus (taken by Peters, as recorded by Finsch, 1875:49). The bird is seemingly much more numerous as a winter visitor in the Marshall Islands than in the Caroline Islands. Coultas (field notes) writes that the cuckoo appears at Kusaie about the first of February. Bogert (1937) remarks that the cuckoo arrives at New Zealand for the breeding period in October or November and leaves for the northern wintering grounds in February or March. Bogert (1937:11) discusses briefly the history of migration of this bird. She presents as a possible reason for the migration the fact that the cuckoo feeds principally on caterpillars and that as a consequence it moves northward to the tropics during the winter months because this food is not available at the breeding grounds in the winter months. Perhaps this cuckoo in developing its ability to fly long distances over water on migration has expanded the breadth of its range eastward into the oceanic islands, rather than westward through Malaysia and Melanesia, because it has found less competition from resident birds and from other migrants for feed and habitat. On many of the islands and atolls of the Pacific Basin, this species is the only land bird known. =Otus podarginus= (Hartlaub and Finsch) Palau Scops Owl _Noctua podargina_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 90. (Type locality, Pelew Islands.) _Noctua podargina_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 8, pl. 1, fig. 1 and 2 (Palau); Giebel, Thes. Ornith., 2, 1875, p. 720 (Pelew); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau). _Ninox podargina_ Sharpe, Cat. Birds British Mus., 2, 1875, p. 151 (Palau); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 51 (Palau); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 61 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 181 (Palau). _Scops podargina_ Sharpe, Cat. Birds British Mus., 2, 1875, p. 313 (Palau); Nehrkorn, Journ. f. Ornith., 1879, p. 394 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Dresden, no. 6, 1890-1891 (1891), p. 3 (Pelew); Matschie, Journ. f. Ornith., 1901, p. 112 (Palau); Dubois, Syn. Avium, 2, 1904, p. 883 (Pelew). _P[isorhina] podargina_ Reichenow, Die Vögel, 1913, p. 424 (Palau). _Otus podarginus_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 268 (Palau); Mayr. Amer. Mus. Novit., no. 1269, 1944, p. 3 (Palau); _idem_, Birds Southwest Pacific, 1945, p. 291 (Palau). _Pyrroglaux podargina_ Yamashina, Tori, 10, 1938, p. 1 (Pelew); Peters, Check-list Birds World, 4, 1940, p. 109 (Babelthuap, Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 202 (Palau). _Geographic range._--Micronesia: Palau Islands--Koror, Babelthuap, Angaur. _Characters._--Adult male: A small owl with forehead and superciliary area whitish tinged with buff and narrowly barred blackish-brown; feathers at base of upper mandible with long, blackish shafts, crown and back rufous-brown; some feathers on neck narrowly barred ochraceous and black; some scapulars with outer webs barred dark brown and white; rump and upper tail-coverts dark rufous, barred white and dark brown; tail rufous, barred indistinctly dark brown, inner webs barred white and dark brown; wings sandy rufous, outer edges of all but first primary spotted buffy-white; lores rufous, shafts white; indistinct eye ring rufous; ear-coverts whitish with rufous tips, chin white; throat white narrowly barred with wavy dark lines and tipped with rufous; breast pale rufous, feathers barred with white and black; abdomen paler rufous; under tail-coverts often barred with black and white without rufous wash; under wing-coverts white barred with dark brown; bill and feet whitish; iris brown. Adult female: Resembles adult male, but darker brown above with fine vermiculations of blackish color; underparts may be pale or dark rufous with slight or heavy white and brown barrings and spots. Immature: Resembles adult male, but upper parts darker brown; forehead, crown, and back barred ochraceous and black; scapulars with white shaft streaks and spots of white; underparts more heavily barred. _Measurements._--Eight males measure: wing, 155-163 (159); tail, 82-88 (84); culmen, 22.0-23.5 (23.0); tarsus, 32-35 (33); two females measure: wing, 158, 165; tail, 83, 90; culmen, 23.5, 24.0; tarsus, 33, 35. _Specimens examined._--Total number, 11 (9 males, 2 females), as follows: Palau Islands, USNM--Koror, 1 (Nov. 3); AMNH--exact locality not given, 10 (Oct., Nov., Dec.). _Remarks._--Coultas (field notes) found the Palau Scops Owl fairly common around villages on the island of Koror. He obtained specimens at night with the use of a flashlight. He writes that the bird moves about considerably remaining on one perch and calling for only approximately three minutes. The bird stays in the mangrove thickets in the daylight hours. Marshall (1949:207) also found the owl at Koror as well as at Peleliu in 1945. He observed 33 pairs on Koror (approximately one-half of the total population) and four pairs on Peleliu. The NAMRU2 party did not find the owl in the southern Palaus in 1945. Yamashina (1938:1) gave the Palau Scops Owl the generic name, _Pyrroglaux_. Mayr (1944b:3) has reviewed this treatment and presents evidence to show that the name _Pyrroglaux_ should not be recognized and that the bird correctly belongs in the genus _Otus_. He presents a detailed discussion to show its relationship to _O. spilocephalus_, and that the characters possessed by _O. podarginus_ are no more different or unusual than those found in other members of this widespread genus. It is pointed out that the reduction of the feathering is probably caused by the change in habitat--from a colder one in Asia to a warmer, tropical one in the Palaus. The bird is probably derived from _O. spilocephalus_ of Asia and Malaysia. =Asio flammeus flammeus= (Pontoppidan) Short-eared Owl _Strix Flammea_ Pontoppidan, Danske, Atlas, 1, 1763, p. 617, pl. 25. (Type locality, Sweden.) _Strix stridula_ Quoy and Gaimard, Voy. "Uranie," Zool., 1824, pp. 680, 696 (Mariannes); _idem_, Ann. Sci. Nat. Paris, 6, 1825, p. 149 (Mariannes). _Otus brachyotus_ Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen); Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 18 (Mariannen?). _Asio accipitrinus_ Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 3 (Marianne); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 168 (Mariannes); Hartert, Novit. Zool., 5, 1898, p. 51 (Marianne); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 44 (Mariannes); Safford, Osprey, 1902, p. 68 (Marianas); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 263 (Tinian); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Tinian); Prowazek, Die deutschen Marianen, 1913, p. 88 (Marianen). _Asi accipitrimus_ Wheeler, Report Island of Guam, 1900, p. 12 (Guam). _Asio flammeus sandwichensis_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 61 (Marianne); Hand-list Japanese Birds (part), rev., 1932, p. 182 (Marianas). _Asio flammeus ponapensis_ Hand-list Japanese Birds (part), 3d ed., 1942, p. 202 (Pagan). _Asio flammeus flammeus_ Mayr, Birds Southwest Pacific, 1945, p. 292 (Marianas). _Geographic range._--Breeds in Europe, Asia, and North America. Winters to tropics. In Micronesia: Mariana Islands--Pagan, Tinian. _Remarks._--The Short-eared Owl was taken at Tinian by Quoy and Gaimard (1824:680, 696) and in recent years has been recorded at Pagan. The committee which prepared the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:202) writes that the bird taken at Pagan has a short wing (288) and indicates that it belongs to _A. f. ponapensis_. In the present work this bird is considered to be _A. f. flammeus_, a migrant from Asia; possibly, however, there is an unrecorded resident population of the Short-eared Owl in the northern Marianas, which may be closely related to _A. f. ponapensis_ of Ponapé. Owls may have at one time been resident in the southern Marianas. At Guam, for instance, owls are well known to the native peoples, and there is suitable habitat for the owl in the extensive grassland areas of the island. Perhaps an owl was resident at Guam and at other islands but has been eliminated partly by the overgrazing and burning of the grassy habitats preferred by the owl. =Asio flammeus ponapensis= Mayr Short-eared Owl _Asio flammeus ponapensis_ Mayr, Amer. Mus. Novit., no. 609, 1933, p. 1. (Type locality, Ponapé.) _Otus brachyotus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 18 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); _idem_, Journ. f. Ornith., 1880, p. 283 (Ponapé); _idem_, Mitth. Ornith. Ver. Wien, 1884, p. 47 (Ponapé); _idem_, Sammlung wissensch. Vorträge, 14 ser., 1900, p. 659 (Ponapé). _Asio brachyotus_ Finsch, Ibis, 1881, pp. 113, 114 (Ponapé). _Asio accipitrinus_ Ridgway, Proc. U. S. Nat. Mus., 4, 1882, p. 367 (Strong's Island = Kusaie); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 3 (Ponapé); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 169 (Ponapi). _Asio flammeus sandwichensis_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 61 (Ponapé); Hand-list Japanese Birds (part), rev., 1932, p. 182 (Ponapé). _Asio flammeus ponapensis_ Kelso, Oölogist, 1938, p. 183 (Kusaie); Peters, Check-list Birds World, 4, 1940, p. 170 (Ponapé); Hand-list Japanese Birds (part), 3d ed., 1942, p. 202 (Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 291 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé, Kusaie? _Characters._--Adult: a large, short-eared owl, dark brown above streaked with buff and lighter below streaked with dark brown. An adult female has upper parts dark brown, outer webs of feathers buffy to give a streaked appearance; rump pale buff, feathers edged subterminally with darker brown; scapulars like head and back; wing-coverts dark brown tipped and edged with splotches of buffy to buffy-rufous; primaries and secondaries brown with large spots of pale rufous; tail brown barred with whitish buff spots, webs with dark centers; forehead whitish tinged with buff; region below and behind eye dark; chin pale with rufous tinged sides; throat and breast rufous-buff with heavy streaks of brown, becoming narrower on abdomen and under tail; under wing-coverts buffy streaked with dark brown; auxilaries buffy; feathering of tibia and tarsus pale buff; bill dark slate; feet grey-brown; iris yellow. Resembles _A. f. flammeus_, but wing shorter and color darker. _Measurements._--Mayr (1933:2) lists the following measurements for two adult females: wing, 295, 307; tail, 135, 139; culmen, 17, 17.5; and tarsus, 48, 51. _Specimens examined._--Total number, 2 females, from Caroline Islands, AMNH--Ponapé (Dec.). _Nesting._--Coultas (field notes) writes that the Short-eared Owl at Ponapé builds its nest in the grass on the ground. He did not observe the nest but received reports of it from the natives. _Remarks._--The owl at Ponapé has been known since the time of Kubary. Coultas, visiting the island in 1930, was the first naturalist to record very much concerning the habits. According to him (field notes) the bird inhabits the open grasslands of Ponapé and apparently has somewhat the same habits as other members of the species. He estimated the population in 1930 as two dozen or more. He found the birds extremely secretive during the daylight hours. They were observed flying over the patches of grassland at twilight and on moonlight nights. He comments that the catlike call of this owl is heard occasionally in the night. Richards writes (_in litt._) that twice in late December, 1947, he saw this owl in a forested area near the summit of Jokaj Island (900 feet). Kelso (1938:138) records the Short-eared Owl from Kusaie on the basis of a specimen taken by Gulick, which Ridgway (1882:367) thought came from the West Indies. The specimen is labeled Strong's Island, which is an old name for Kusaie. Kelso gives the measurements of this bird as: wing, 275; tail, 141; culmen from cere, 19.5, and comments that the wings are shorter than those of specimens from Asia. The skin is in the U. S. National Museum. The Short-eared Owl at Ponapé closely resembles _A. f. flammeus_ but is slightly smaller and darker. Apparently the owl came to Ponapé as a straggler on migration from Asia, and becoming acclimated and adapted to the grassy areas at Ponapé remained as a resident. The occurrence of _A. f. flammeus_ in the Marianas on migration offers evidence as to how the bird originally reached Ponapé. =Caprimulgus indicus jotaka= Temminck and Schlegel Jungle Nightjar _Caprimulgus jotaka_ Temminck and Schlegel, in Siebold's Fauna Japonica, Aves, 1847, p. 37, pl. 12, 13. (Type locality, Japan.) _Caprimulgus indicus jotaka_ Hand-list Japanese Birds, rev., 1932, p. 179 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 199 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in eastern Asia and Japan. Winters south to tropics. In Micronesia: Palau Islands--exact locality unknown. _Remarks._--According to the committee who prepared the Hand-list of Japanese Birds (Hachisuka _et al._, 1942:199), one female was obtained by Oba in the Palaus in November, 1930. The skin was placed in the Kuroda collection. Coultas obtained a male on December 9, 1931, in the Palaus, which is in the American Museum of Natural History. The bird is apparently an occasional migrant to western Micronesia. =Caprimulgus indicus phalaena= Hartlaub and Finsch Jungle Nightjar _Caprimulgus phalaena_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 91. (Type locality, Pelew.) _Caprimulgus phalaena_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 13, pl. 2, fig. 1, 2 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 17 (Pelew); Hartert, Cat. Birds British Mus., 16, 1892, p. 545 (Pelew); _idem_, Das Tierreich, no. 1, 1897, p. 51 (Palau); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 65 (Palau); Matschie, Journ. f. Ornith., 1901, p. 112 (Palau); Dubois, Syn. Avium 1, 1902, p. 124 (Pelew); Reichenow, Die Vögel, 2, 1914, p. 154 (Palau); Mathews, Syst. Avium. Australasianarum, 1, 1927, p. 396 (Pelew); Hachisuka, Birds Philippines, 2, 1934, p. 120 (Pelew). _Caprimulgus indicus phalaena_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 61 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 179 (Palau); Peters, Check-list Birds World, 4, 1940, p. 204 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 199 (Babelthuap, Koror); Mayr, Birds Southwest Pacific, 1945, p. 292 (Palau). _Geographic range._--Micronesia: Palau Islands--Babeltuap, Koror, Garakayo. _Characters._--Adult male: "Above grayish-brown, very finely vermiculated, more rufous on the back, with large longitudinal streaks and a few cross markings; scapulars partly with pale buff bands, mostly pale gray at the basal portion; primaries deep brown, with a white spot to the inner web of the first primary not extending to the shaft, second and third primary with fine spots to the inner web extending to the shaft and obsolete white spots to the outer web, fourth primary with a smaller and less pure white spot; chin and throat blackish brown, barred with rufous, with two white spots on the throat; breast brownish gray, vermiculated and spotted with brown and blackish; abdomen dirty ochraceous buff barred with brown, the bars wider on the lower tail-coverts; retrices rufous-brown with blackish bars, outer ones with broad white terminal spots." (Hartert, 1892:545.) Bill basally whitish with black tip; feet blackish pink; iris dark brown. Adult female: According to Hartert (1892:545) similar to male, but with small, more or less obsolete, rufous-buff (not white) spots on the primaries; rectrices without white spots. Immature: Resembles adult but paler and less distinctly marked. _C. i. phalaena_ resembles _C. i. jotaka_, but is paler; the male is more broadly barred and more buffy on abdomen and under side of tail; the female has paler spots on wing. _Measurements._--Measurements of four males: wing, 161-168 (165); tail, 118-129 (124); culmen, 22; tarsus, 14.0-15.1 (14.5); of four females: wing, 161-165 (163); tail, 118-127 (123); culmen, 22; tarsus, 14.5-15.6 (15.1). _Specimens examined._--Total number, 8 (4 males, 4 females), as follows: Palau Islands, USNM--Koror, 3 (Nov. 3, 20, 29); AMNH--exact locality not given, 5 (Oct., Nov., Dec.). _Remarks._--This subspecies of the Jungle Nightjar is restricted to the Palau Islands and particularly to those islands possessing damp, shady forests and mangrove swamps. In September, 1945, two birds were observed at the edge of a mangrove swamp at Garakayo at twilight by the NAMRU2 party, but neither of them was taken. Coultas (field notes) found the nightjar in mangrove swamps. He writes that they remain quiet there during the daylight hours. He took specimens both in the evening and at dawn. He considers the bird as not very common. Marshall (1949:208) obtained specimens at Koror in 1945. Among the races of _C. indicus_, the coloration of _C. i. phalaena_ resembles most closely that of _C. i. jotaka_; probably _C. i. phalaena_ was derived from _C. i. jotaka_ of Asia. Apparently this bird arrived at the Palaus by way of the Philippines. It is found only in these islands of Micronesia and maybe another one of that group of species which reached the Palaus without expanding their ranges farther into Micronesia. =Collocalia inexpectata pelewensis= Mayr Edible Nest Swiftlet _Collocalia pelewensis_ Mayr, Amer. Mus. Novit., no. 820, 1935, p. 3. (Type locality, Palau Islands.) _Collocalia vanicorensis_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 829 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 4, 116, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, p. 89 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 15 (Palau); _idem_ (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 24 (Palau); _idem_ (part), Proc. Zool. Soc. London, 1880, p. 575 (Palaos); _idem (part), Ibis, 1881, p. 104 (Pelew); Tristram, Cat. Birds, 1889, p. 111 (Pelew);_ Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 18 (Pelew); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Palau). _Collocalia vanikorensis_ Gray, Hand-list Birds, 1, 1869, p. 66 (Pelew); Giebel, Thes. Ornith., 1, 1872, p. 737 (Pelew). _Collocalia fuciphaga_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 189 (Palaos); Reichenow, Die Vögel, 2, 1914, p. 161 (Palau). _Collocalia francica_ Takatsukasa and Kuroda, Tori, 1915, p. 53 (Pelew). _Collocalia fuciphaga inquieta_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 62 (Pelew). _Collocalia unicolor amelis_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 63 (Pelew). _Collocalia fuciphaga amelis_ Hand-list Japanese Birds, rev., 1932, p. 179 (Palau). _Collocalia (vanikorensis) pelewensis_ Mayr, Amer. Mus. Novit., no. 828, 1936, p. 11 (Palau). _Collocalia germani pelewensis_ Mayr, Amer. Mus. Novit., no. 915, 1937, p. 18 (Palau). _Collocalia inexpectata pelewensis_ Peters, Check-list Birds World, 4, 1940, p. 224 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 292 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 63 (Garakayo, Peleliu). _Collocalia vanikorensis pelewensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 199 (Babelthuap, Koror). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Angaur. _Characters._--Adult, according to Mayr (1935:3): "Small; tarsus naked; upper parts dark fuscous-green, with a brownish tone on back; crown not much darker than back; rump pale but no distinct light gray bar across rump as in _C. spodiopygia_; color of the rump showing much individual variation, bases of feathers always being pale gray, but tips sometimes strongly glossy green; inner margins of wing-feathers not particularly light; feathers of chin and throat soft, with fuscous bases and rather sharply defined silvery-gray edges, but no shaft-streaks; abdomen dull gray, slightly darker than throat, inconspicuous shaft-streaks on breast and abdomen, more pronounced shaft-streaks on under tail-coverts; longest under tail-coverts fairly glossy green; white loral spot inconspicuous." _Measurements._--Measurements are listed in table 30. TABLE 30. MEASUREMENTS OF _Collocalia inexpectata_ IN MICRONESIA ====================+=====+===============+============ SUBSPECIES | No. | Wing | Tail --------------------+-----+---------------+------------ _C. i. pelewensis_ | 14 | 111 (109-113) | 50 (47-51) | | | _C. i. bartschi_ | 13 | 108 (105-108) | 54 (52-57) --------------------+-----+---------------+------------ _Specimens examined._--Total number, 20 (12 males, 8 females), as follows: Palau Islands, USNM--Peleliu, 1 (Sept. 13)--Garakayo, 2 (Sept. 18)--Koror, 3 (Nov. 5, 6, 7); AMNH--exact locality not given, 14 (Oct., Dec.). _Remarks._--The NAMRU2 party found the swiftlet to be numerous on islands in the southern Palaus in 1945. The birds were observed flying in clearings and about the cliffs. Coultas writes (field notes) that they nest in caves on the smaller islands. =Collocalia inexpectata bartschi= Mearns Edible Nest Swiftlet _Collocalia bartschi_ Mearns, Proc. U. S. Nat. Mus., 36, 1909, p. 476. (Type locality, Guam.) _Cypselus inquietus_ Kittlitz (part), Obser. Zool., in Lutké., Voy. "Le Séniavine," 3, 1836, p. 304 (Guahan); _idem_ (part), Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 26 (Guahan). _Collocalia nidifica_ Gray (part), Ann. Mag. Nat. Hist., (3), 17, 1866, p. 125 (Marianne); _idem_ (part), Hand-list Birds, 1, 1869, p. 65 (Marianne). _Collocalia vanicorensis_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, p. 24 (Marianen); _idem_ (part), Ibis, 1881, p. 105 (Guam); Oustalet, Le Nat., 1889, p. 260 (Mariannes); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 18 (Marianne); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Guam, Saipan). _Collocalia fuciphaga_ Sclater, Proc. Zool. Soc. London, 1865, p. 616 (Marianne); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 187 (Mariannes); Hartert, Novit. Zool., 5, 1898, p. 53 (Rota, Guam, Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 46 (Marianas); Safford, Osprey, 1902, p. 60 (Marianas); _idem_, The Plant World, 7, 1904, pp. 84, 263 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Prowazek, Die deutschen Marianen, 1913, p. 102 (Marianen); Cox, Island of Guam, 1917, p. 21 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 25 (Guam). _Collocalia fuchphaga_ Wheeler, Report Island of Guam, 1900, p. 13 (Guam). _Collocalia fuciphaga fuciphaga_ Oberholser (part), Proc. Acad. Nat. Sci. Phila., 1906, p. 186 (Guam). _Collocalia unicolor amelis_ Oberholser, Proc. Acad. Nat. Sci. Phila., 1906, p. 193 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 63 (Guam). _Collocalia fuciphaga tachyptera_ Obersolser, Proc. U. S. Nat. Mus., 42, 1912, p. 20 (Type locality, Guam); Stresemann, Verhandl. Ornith. Gesellsch. Bayern, 12, 1914, p. 11 (Guam); Takatsukasa and Kuroda, Tori, 1, 1915, p. 63 (Marianas); Kuroda, in Momiyama, Birds Michnoseia, 1922, p. 62 (Guam, Saipan, Rota). _Collocalia unicolor bartschi_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 63 (Guam). _Collocalia fuciphaga bartschi_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 402 (Guam); Hand-list Japanese Birds, rev., 1932, p. 178 (Marianas). _Collocalia vanikorensis bartschi_ Mayr, Amer. Mus. Novit., no. 828, 1936, p. 11 (Marianne); Hand-list Japanese Birds, 3d ed., 1942, p. 198 (Saipan, Rota, Guam). _Collocalia germani bartschi_ Mayr, Amer. Mus. Novit., no. 915, 1937, p. 18 (Marianne). _Collocalia inexpectata bartschi_ Peters, Check-list Birds World, 4, 1940, p. 224 (Marianne); Mayr, Birds Southwest Pacific, 1945, p. 292 (Marianas); Watson, The Raven, 17, 1946, p. 41 (Guam); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 105 (Tinian); Stott, Auk, 64, 1947, p. 526 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 63 (Guam, Rota). _Collocalia inexpectata_ Strophlet, Auk, 63, 1946, p. 538 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam, Rota, Tinian, Saipan. _Characters._--Resembles _C. i. pelewensis_, but with wing shorter; upper parts lighter; underparts more brownish and lacking dark shaft-streaks on breast and abdomen; feathers on lores whiter basally. _Measurements._--Measurements are presented in table 30. _Weights._--The present author (1948:63) lists the weights of seven adult males as 6.4-7.3 (6.8); of three adult females as 6.8-7.6 (7.1). These birds were taken at Guam. _Specimens examined._--Total number, 48 (17 males, 19 females, 12 unsexed), as follows: Mariana Islands, USNM--Guam, 21 (Jan. 29, May 20, June 21, July 20, 29)--Rota, 1 (Oct. 27); AMNH--Guam, 18 (Jan. 22, 29, Feb. 15, July 10, Aug. 11, 12)--Saipan, 8 (Sept. 17). _Remarks._--The taxonomic relationships of the species and subspecies of the genus _Collocalia_ are not fully known. The many different name combinations applied to the five kinds named from Micronesia are evidence of the lack of agreement among previous writers as to the correct systematic positions of the kinds. The genus is widely distributed in southeastern Asia and adjacent islands and is divisible into a number of species and subspecies. This diversity is apparently influenced by the restriction of the birds to local habitats caused, as Stresemann (1931b:83) states, by the necessity of staying by their nesting areas which are in caves. Stresemann also points out that the birds are thus dependent on "narrowly limited ecological conditions." The birds are confined to certain areas and are, therefore, isolated from other populations. Most of the volcanic islands of Micronesia have numerous caves which are suitable to the swiftlets for nesting. _C. inexpectata_ evolved in the Malayan region and apparently spread to Micronesia via the Philippines to Palau and to the Marianas. The two subspecies of _C. inexpectata_ in Micronesia resemble closely those to the westward but are smaller. I am following Peters (1940:224) in the treatment of these, and although some future reviser may rearrange these species and subspecies, it appears to me that the Micronesian swiftlets fall into the two natural groups (_C. inexpectata_ and _C. inquieta_) now recognized, even though their parent stocks in Malaysia, in my opinion, are inadequately known. At Guam and Rota, the NAMRU2 party found swiftlets concentrated at cliff areas, flying about in large groups. Away from the cliffs fewer were seen and singles were observed in woodland openings, over fields, and in the coconut groves. On May 18, 1945, a colony of nesting birds was found approximately two miles east of Agaña on Guam. This colony was in a coral sink-hole which was approximately 75 feet deep and 60 feet in diameter. The nests were grouped in clusters of 5 to 25 or more, on underhanging ledges, sheltered from the light. The nests, which were fastened securely to the irregular ledges, were knocked down by shots from our collecting guns. Approximately 250 nests were found; no eggs were observed, the nests containing young birds. The young were in various stages of development; some were with little feather growth, others were completely feathered. Nests examined contained only one young each. The pile of guano below each cluster of nests was large; an estimate made at the time indicated that there were 10 or more tons in each pile. Guano deposits in large quantities were found also in caves at Amantes Point, Guam. =Collocalia inquieta inquieta= (Kittlitz) Carolines Swiftlet _Cypselus inquietus_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 285. (Type locality, Ualan.) _Cypselus inquietus_ Kittlitz (part), Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 26 (Ualan). _Collocalia ualensis_ Streubel, Isis, 1848, p. 368 (no type locality = Kusaie?). _Collocalia nidifica ualensis_ Gray, Ann. Nat. Hist., 17, 1866, p. 123 (Caroline Islands = Kusaie?). _Collocalia vanicorensis_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, p. 24 (Ualan); _idem_ (part), Proc. Zool. Soc. London, 1880, p. 575 (Kuschai); _idem_ (part), Journ. f. Ornith., 1880, pp. 285, 298 (Kuschai); _idem_ (part), Ibis, 1881, pp. 104, 108 (Kushai); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 18 (Ualan); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ualan). _Collocalia fuciphaga_ Hartert (part), Cat. Birds British Mus., 16, 1892, p. 498 (Kuschai); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 190 (Oualan). _Collocalia fuciphaga fuciphaga_ Oberholser (part), Proc. Acad. Nat. Sci. Phila., 1906, p. 186 (Ualan). _Collocalia fuciphaga vanikorensis_ Oberholser (part), Proc. U. S. Nat. Mus., 42, 1912, p. 20 (Kusaie). _Collocalia fuciphaga inquieta_ Stresemann, Verhandl. Ornith. Gesellsch. Bayern, 12, 1914, pp. 9, 11 (Ualan); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 62 (Kusaie); Hand-list Japanese Birds (part), rev., 1932, p. 179 (Kusaie). _Collocalia inquieta inquieta_ Mayr, Amer. Mus., Novit., no. 915, 1937, p. 11 (Kusaie); Peters, Check-list Birds World, 4, 1940, p. 225 (Kusaie); Mayr, Birds Southwest Pacific, 1945, p. 292 (Kusaie). _Collocalia vanikorensis inquieta_ Hand-list Japanese Birds, 3d ed., 1942, p. 199 (Kusaie). _Geographic range._--Micronesia: Caroline Islands--Kusaie. _Characters._--Adult: Upper parts dark (sooty-black) with a slight greenish gloss on head and back and a more conspicuous bluish-purple gloss on the wings and tail; feathers of lores white, tipped with black; underparts smoky-gray; feet brownish; bill black; iris dark brown. _Measurements._--Measurements are presented in table 31. _Specimens examined._--Total number, 42 (21 males, 20 females, 1 unsexed), as follows: Caroline Islands, USNM--Kusaie, 1 (Feb. 8); AMNH--Kusaie, 41 (Jan., Feb., March). _Remarks._--Kittlitz obtained this swiftlet when he visited Kusaie from December 8, 1827, to January 1, 1828. In 1931, Coultas found the bird common at Kusaie. The name _Collocalia ualensis_, published by Streubel in Isis in 1848, p. 368, is without mention of a locality, but is later used by Gray to denote the swiftlet in the Caroline Islands. TABLE 31. MEASUREMENTS OF _Collocalia inquieta_ ============================+=====+==================== SUBSPECIES | No. | Wing ----------------------------+-----+-------------------- _Collocalia i. inquieta_ | 11 | 119 (116-125) | | _Collocalia i. ponapensis_ | 10 | 110 (107-114) | | _Collocalia i. rukensis_ | | (112-119.5)[C] ----------------------------+-----+-------------------- [C] (Mayr, 1935:3). =Collocalia inquieta rukensis= Kuroda Carolines Swiftlet _Collocalia fuciphaga rukensis_ Kuroda, Tori, 1, 1915, pp. 58, 59, pl. 3, fig. 1. (Type locality, Ruk.) _Collocalia vanicorensis_ Finsch (part), Proc. Zool. London, 1880, p. 575 (Ruk); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 18 (Uap and Ruk); Hartert, Novit. Zool., 7, 1900, p. 11 (Ruk); Matschie, Journ. f. Ornith., 1901, p. 112 (Yap, Ruk). _Collocalia fuciphaga vanikorensis_ Oberholser (part), Proc. U. S. Nat. Mus., 42, 1912, p. 20 (Uala = Truk). _Collocalia fuciphaga rukensis_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 53 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 62 (Ruk, Yap); Kuroda, Ibis, 1927, p. 706 (Truk); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 402 (Ruk); Hand-list Japanese Birds, rev., 1932, p. 178 (Ruk). _Collocalia fuciphaga inquieta_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 62 (Ruk). _Collocalia inquieta rukensis_ Mayr, Amer. Mus. Novit., no. 915, 1937, p. 11 (Ruk); Peters, Check-list Birds World, 4, 1940, p. 225 (Truk, Yap); Mayr, Birds Southwest Pacific, 1945, p. 292 (Yap, Truk). _Collocalia vanikorensis rukensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 198 (Truk, Yap). _Geographic range._--Micronesia: Caroline Islands--Truk, Yap. _Characters._--Adult: Resembles _C. i. inquieta_ but with wing shorter. _Measurements._--Measurements are given in table 31. _Specimen examined._--One unsexed bird from Caroline Islands, USNM--Truk (Feb. 16). _Remarks._--Little is known concerning this swiftlet. The bird at Yap is referred to this race; I have not seen specimens from this island. McElroy reports seeing no swiftlets at Truk in December, 1945. _C. i. rukensis_ appears to be intermediate in size between _C. i. inquieta_ and _C. i. ponapensis_. Richards writes (_in litt._) that he found swiftlets common at Truk in 1948. He also noted a large swiftlike bird in "January or February," 1948, near the summit of Mount Tonáchian on Moen Island. From his description, the bird may have been a large migratory swift, possibly _Apus pacificus_ or _Chaetura caudacuta_, neither of which have been reported previously from Micronesia. =Collocalia inquieta ponapensis= Mayr Carolines Swiftlet _Collocalia vanikorensis ponapensis_ Mayr, Amer. Mus. Novit., no. 820, 1935, p. 3. (Type locality, Ponapé.) _Collocalia vanicorensis_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 23 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); _idem_ (part), Journ. f. Ornith., 1880, p. 285 (Ponapé); _idem_, Ibis, 1881, p. 115 (Ponapé); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 18 (Ponapé); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ponapé). _Collocalia fuciphaga_ Hartert, Cat. Birds British Mus., 16, 1892, p. 498 (Ponapé). _Collocalia fuciphaga vanikorensis_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 53 (Ponapé). _Collocalia fuciphaga inquieta_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 62 (Ponapé). _Collocalia vanikorensis ponapensis_ Mayr, Amer. Mus. Novit., no. 828, 1936, p. 12 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 198 (Ponapé). _Collocalia inquieta ponapensis_ Mayr, Amer. Novit., no. 915, 1937, p. 11 (Ponapé); Peters, Check-list Birds World, 4, 1940, p. 225 (Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 292 (Ponapé). _Collocalia inquieta_ Mayr, Proc. 6th Pac. Sci. Congr., 4, 1941, p. 204 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: According to Mayr (1936:12), "Very similar to _inquieta_, but much smaller; on the upper parts apparently somewhat less glossy, and not so dark, more brownish; under parts very variable, sometimes very dark (partly on account of greasing), sometimes quite silvery on the throat; very dark specimens show some greenish gloss not only on the longest under tail-coverts, but also on the entire under side, except on the throat; rump of the same color as the back; tarsus unfeathered." _Measurements._--Measurements are listed in table 31. _Specimens examined._--Total number, 37 (19 males, 18 females) from Caroline Islands, AMNH--Ponapé (Nov., Dec.). _Nesting._--Coultas obtained young birds from nests in caves in November and December. _Remarks._--I am following Mayr (1937:11) and Peters (1940:225) in this treatment of these Caroline swiftlets, even though the differences between _C. inquieta_ and _C. vanikorensis_ appear to be slight indeed. _C. inquieta_ appears closest to the forms of _C. vanikorensis_ in Northern Melanesia. The birds found in New Guinea and the Solomons are similar in size to the birds in the Carolines, while those in the Moluccas, Admiralties and Lihir are larger. Color differences are slight with the pale color of the sides of the head and underparts being variable. All of these dark-rumped birds evidently evolved in the Melanesian area. =Halcyon cinnamomina cinnamomina= Swainson Micronesian Kingfisher _Halcyon cinnamomina_ Swainson, Zool. Illustr., 2, 1821, text to pl. 67. (No type locality = Guam.) _Halcyon cinnamomina_ Hartlaub, Journ. f. Ornith., 1854, p. 167 (Marianen = Guam); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 5 (Ladrone or Marian Islands = Guam); Sharpe (part), Monogr. Alced., 1868-71, pp. xxxii, 213, pl. 80 (Guam); Gray, Hand-list Birds, 1, 1869, p. 93 (Mariannes = Guam); Oustalet, Le Nat., 1889, p. 260 (Mariannes = Guam); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 16 (Guam); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 175 (Guam); Hartert, Novit. Zool., 5, 1898, p. 53 (Guam); Matschie, Journ. f. Ornith., 1901, pp. 112, 113, 114 (Guam); Wharton, Ecol. Monogr., 16, 1946, p. 174 (Guam); Strophlet, Auk, 63, 1946, p. 538 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam). _Alcedo ruficeps_ Dumont, Dict. Sci. Nat., 29, 1823, p. 273 (Mariannes = Guam); Pucheran, Rev. et Mag. de Zool., 1853, p. 387 (Mariannes = Guam); Hartlaub, Journ. f. Ornith., 1855, p. 423 (Mariannen = Guam). _Dacela ruficeps_ Lesson, Traité d'Ornith., 1831, p. 247 (Mariannes = Guam). _Halcyon cinnamomeus_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 304 (Guahan). _Dacelo cinnamomina_ Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 131 (Guahan); Schlegel, Mus. Pays-Bas, 3, no. 17, 1863, p. 39; no. 39, 1874, p. 29 (Mariannes = Guam); Giebel, Thes. Ornith., 2, 1875, p. 3 (Mariannae = Guam). _Todiramphus cinnamominus_ Cassin, U. S. Expl. Exped. 1838-'42, 1858, pp. 220, 225 (Ladrone or Marianna Islands = Guam). _Sauropatis cinnamomina_ Cabanis, Mus. Hein., 2, 1859-'60, p. 159 (Marianen); Salvadori (part), Ornith. Papuasia, 1, 1880, p. 481 (Marianne = Guam). _Halcyon cinnamominus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 20 (Marianen = Guam); Sharpe, Cat. Birds British Mus., 17, 1892, p. 259 (Marianne = Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 45 (Guam); Safford, Osprey, 1902, p. 69 (Guam); Dubois, Syn. Avium, 1, 1902, p. 108 (Guam); Safford, The Plant World, 7, 1904, p. 263 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Mearns, Proc. U. S. Nat. Mus., 36, 1909, p. 476 (Guam); Reichenow, Die Vögel, 2, 1914, p. 116 (Marianen = Guam); Takatsukasa and Kuroda, Tori, 1, 1915, p. 63 (Mariannes = Guam); Cox, Islands of Guam, 1917, p. 21 (Guam); Thompson, Guam and its people, 1942, p. 23 (Guam). _Halcyon rufigularis_ Sharpe, Cat. Birds British Mus., 17, 1892, p. 260 (No type locality = Guam). _Halcyon cinnamanea_ Wheeler, Report Island of Guam, 1900, p. 12 (Guam). _Halcyon cinnamonius_ Prowazek, Die deutschen Marianen, 1913, p. 102 (Marianen = Guam). _Souropatis cinnamominus_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 59 (Guam). _Hyposyma cinnamomina_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 384 (Marianne = Guam). _Halcyon cinnamomina cinnamomina_ Hand-list Japanese Birds, rev., 1932, p. 179 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 200 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 293 (Guam); Peters, Check-list Birds World, 5, 1945, p. 206 (Guam); Watson, The Raven, 17, 1946, p. 41 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 63 (Guam). _Halcyon cinnamomius_ Bryan, Guam, Rec., vol. 13, no. 2, 1936, p. 25 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam. _Characters._--Adult male: Head, neck, upper back, and entire under surface near "Sanford's brown"; auriculars black with bluish wash; narrow black line extending around nape; orbital ring black; lower back, lesser wing-coverts, and scapulars deep greenish-blue; outer webs of wing feathers and tail blue; rump resembles tail but slightly lighter; under wing-coverts greenish-blue; feet dark brown; bill black, base of mandible paler; iris dark brown. Adult female: Resembles adult male, but chin, throat, and upper breast paler; rest of underparts and under wing-coverts white; a few cinnamon-tipped feathers on tibia and at bend of wing; back and scapulars darker olive-green and less blue. Immature: Resembles adult, but brown of crown mixed with greenish-blue; back and wing-coverts edged with pale cinnamon; chin and throat whitish; rest of underparts buffy-white in male and paler in female; feathers on breast and nape with dark edgings. _Measurements._--Measurements are listed in table 32. TABLE 32. MEASUREMENTS OF _Halcyon cinnamomina_ =====================+==========+==========+=========+=========+======== | | | | Exposed | SUBSPECIES | Number | Wing | Tail | culmen | Tarsus ---------------------+----------+----------+---------+---------+-------- _H. c. cinnamomina_ |31 males | 102 | 77 | 37 | 15 | | (96-105) | (73-83) | (35-39) | (14-17) | | | | | |25 females| 102 | 79 | 38 | 15 | | (99-106) | (74-84) | (35-38) | (14-17) | | | | | _H. c. pelewensis_ | 5 males | 89 | 61 | 39 | 14 | | (88-89) | (58-64) | (38-40) | (13-14) | | | | | | 4 females| 88 | 64 | 39 | 14 | | (88-89) | (61-67) | (38-39) | (13-14) | | | | | _H. c. reichenbachii_|14 males | 99 | 74 | 41 | 16 | | (96-101) | (72-77) | (39-43) | (16-17) | | | | | |15 females| 100 | 74 | 41 | 16 | | (96-102) | (71-76) | (39-42) | (15-17) ---------------------+----------+----------+---------+---------+-------- _Weights._--The NAMRU2 party obtained the following weights: 11 adult males, 56-62 (59); 10 adult females, 58-76 (66). _Specimens examined._--Total number, 72 (40 males, 32 females), as follows: Mariana Islands, USNM--Guam, 38 (Feb. 14, 24, March 8, May 25, 26, 30, June 2, 3, 4, 6, 13, 14, 16, 18, 19, 28, 29, July 6, 7, 10, 18, 20, Aug. 24, 30, Nov. 19); AMNH--Guam, 34 (Jan., Feb., March, April, July, Aug., Sept., Nov., Dec.). _Nesting._--In 1945, the NAMRU2 party found the kingfisher nesting in the months of March, April, May, and July. Nests were placed in hollows of trees, usually ten or more feet above the ground. On April 3, a nest was found in a banyan tree approximately 25 feet above the ground in a hollow limb. There were two entrances to the nest cavity and both the male and female were observed to feed the young. They did not enter the hollow but placed food in the protruding beaks of the young; the parents and nestling both were exceedingly noisy throughout most of the feeding period. On July 8, McElroy found a nest containing two white eggs, partly incubated, in a cavity of a felled coconut palm at Agfayan Bay. _Molt._--Examination of specimens indicates that the time of molt is irregular or that molting may occur at any time of the year. However, there may be a peak in molting in July, August and September; many of the adult birds taken then show evidence of molting of wing and tail. This is immediately following the period of greatest nesting activity. _Food habits._--The Micronesian Kingfisher at Guam feeds on various kinds of animal life; lizards and insects are the principal items. Of three birds taken on February 14, the stomach of one contained a blue-tailed skink; one contained parts of insects and one contained parts of a gecko. I watched a kingfisher capture and swallow a skink on January 14. The bird remained motionless on its perch until the reptile approached within striking distance. Seale (1901:45) writes that the bird has a bad reputation as a chicken thief. He remarks, "I rather doubted his ability in this line until one day I actually saw him attack a brood of small chicks quite near me, and he would have undoubtedly secured one had not the mother hen rushed to the rescue." _Parasites._--Wharton (1946:174) obtained the chigger (Acarina), _Trombicula_ sp., from the Guam Kingfisher. _Remarks._--In 1820, Quoy and Gaimard (1824:35) obtained five specimens of this kingfisher at Guam and called the bird "Martin-chasseur à têterouse." Kittlitz recorded the bird in March, 1828. Marche obtained a series of 57 skins at Guam in 1887 and 1888; these were sent to the Paris Museum. Sharpe described the female as a separate species in 1892. There is considerable variation in the coloration of adult birds, which is mostly due to fading, as suggested by Hartert (1898:52). Some individuals have the crown feathers much abraided as a result of rubbing the crown against the edge of the nest holes as the birds enter and leave them. The kingfisher is fairly common at Guam. It is primarily a bird of the forest, preferring particularly the marginal habitats between woodlands and openings. I saw only a few birds in open country; only rarely were birds seen sitting on the telephone lines along the roads. The writer (1947b:124) found that of all the birds frequenting habitat along roadways on Guam, the kingfisher comprised only 1.2 percent. Thus, it can be said that it is not a bird of very conspicuous habits, although its noisy "rattle" may be heard in the day and at night. =Halcyon cinnamomina pelewensis= Wiglesworth Micronesian Kingfisher _Halcyon pelewensis_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 15. (Type locality, Pelew Islands.) _Halcyon reichenbachii_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 4, 118 (Pelew); Sharpe, Cat. Birds British Mus., 17, 1892, p. 261 (Pelew). _Halcyon cinnamomina_ Sharpe (part), Monogr. Alced., 1868-'71, pp. xxxii, 213, pl. 30 (Pelew); Tristram (part), Cat. Birds, 1889, p. 92 (Pelew). _Dacelo reichenbachii_ Schlegel, Mus. Pay-Bas, 3, no. 39, 1874, p. 29 (Pelew). _Halcyon reichenbachi_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 11 (Palau); Reichenow, Die Vögel, 2, 1914, p. 116 (Palau). _Halcyon cinnamominus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 20 (Palau). _Sauropatis cinnamomina_ Salvadori (part), Ornith. Papuasia, 1, 1880, p. 481 (Pelew). _Halcyon pelewensis_ Hartert, Novit. Zool., 5, 1898, p. 53 (Pelew); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 53 (Pelew); Uchida, Annot. Zool. Japan., 9, 1918, p. 483 (Palau). _Halcyon Reichenbachi_ var. _pelewensis_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 186 (Pelew). _Halcyon cinnamominus_ var? _pelewensis_ Dubois, Syn. Avium, 1, 1902, p. 108 (Pelew). _Sauropatis reichenbachii pelewensis_ Kuroda, in Momiyama, Birds Micronesia, 1932, p. 60 (Angaur). _Hyposyma cinnamomina pelewensis_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 385 (Palau). _Halcyon cinnamomina pelewensis_ Hand-list Japanese Birds, rev., 1932, p. 180 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 200 (Babelthuap, Koror); Mayr, Birds Southwest Pacific, 1945, p. 293 (Palau); Peters, Check-list Birds World, 5, 1945, p. 206 (Babelthuap, Koror); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, pp. 63, 64 (Peleliu, Ngabad). _Geographic range._--Micronesia: Palau Islands--Kayangel, Babelthuap, Koror, Garakayo, Ngabad, Angaur. _Characters._--Adult: Resembles adult of _H. c. cinnamomina_, but smaller and with underparts white; auriculars with less bluish wash; outer webs of outer tail feathers edged with white. Immature: Resembles immature female of _H. c. cinnamomina_, but smaller with white underparts edged with black on throat, breast, and upper abdomen; outer webs of outer tail feathers edged with white. _Measurements._--Measurements are presented in table 32. _Specimens examined._--Total number, 17 (8 males, 8 females, 1 unsexed), as follows: Palau Islands, USNM--Babelthuap, 1 (Nov. 30)--Peleliu, 1 (Sept. 10)--Ngabad, 3 (Sept. 11); AMNH--exact locality not given, 12 (Oct., Nov., Dec.). _Food habits._--Stomachs of specimens obtained by the NAMRU2 party at Palau contained insects. One male had a large cicada in its stomach. Coultas (field notes) writes that foods of this bird consist of grubs and ants. _Parasites._--Uchida (1918:483) found the bird louse (Mallophaga), _Docophorus alatoclypeatus_, on this bird at Palau. _Remarks._--In 1945, the NAMRU2 party found this kingfisher in forested areas and at the edges of mangrove swamps on small islands near Peleliu. Only six birds were seen. The bird was located by listening for and determining the direction of its rasping call. After a search of the area of leafy foliage from where the call was coming, the bird would be seen sitting motionless on a near-by perch. McElroy of the NAMRU2 party saw a kingfisher with cinnamon underparts at Bulubul Island at Ulithi Atoll on August 21, 1945. It was not taken. =Halcyon cinnamomina reichenbachii= (Hartlaub) Micronesian Kingfisher _Todirhamphus Reichenbachii_ Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 131. (Type locality, Ponapé.) _Halcyon cinnamominus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 19 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); _idem_, Journ. f. Ornith., 1880, p. 285 (Ponapé); _idem_, Journ. f. Ornith., 1880, p. 285 (Ponapé); _idem_, Mitth. Ornith. Ver. Wien, 1884, p. 47 (Ponapé). _Sauropatis cinnamomina_ Salvadori (part), Ornith. Papuasia, 1, 1880, p. 481 (Ponapé). _Halcyon cinnamomina_ Finsch, Ibis, 1881, pp. 112, 114 (Ponapé); Tristram (part), Cat. Birds, 1889, p. 92 (Ponapé). _Halcyon mediocris_ Sharpe, Cat. Birds British Mus., 17, 1892, p. 260 (Type locality, Ponapé); Wiglesworth, Abhandl. and Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 16 (Ponapé); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, pp. 177, 180, 181, 184, 185, 186 (Ponapi); Reichenow, Die Vögel, 2, 1914, p. 116 (Ponapé). _Halcyon reichenbachi_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 15 (Ponapé); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, pp. 176, 180, 181, 182, 183, 184, 185, 186 (Ponapi); Hartert, Novit. Zool., 5, 1898, p. 53 (Ponapé); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). _Halcyon cinnamominus_ var. _reichenbachi_ Dubois, Syn. Avium, 1, 1902, p. 108 (Ponapé). _Halcyon cinnamominus_ var. _mediocris_ Dubois, Syn. Avium, 1, 1902, p. 108 (Ponapé). _Halcyon reichenbachii_ Takatsukasa and Kuroda, Tori, 1, 1915, p. 53 (Ponapé). _Sauropatis mediocris_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 195 (Ponapé). _Sauropatis reichenbachii reichenbachii_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 60 (Ponapé). _Hyposyma cinnamomina reichenbachii_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 384 (Ponapé). _Halycyon cinnamomina reichenbachii_ Hand-list Japanese Birds, rev., 1932, p. 180 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 200 (Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 293 (Ponapé); Peters, Check-list Birds World, 5, 1945, p. 206 (Ponapé). _Halcyon cinnamomina reichenbachii_ Bequaert, Mushi, 12, 1939, p. 82 (Ponapé); idem, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 290 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult male: Resembles adult male of _H. c. cinnamomina_, but with slightly smaller wing and smaller tail; slightly longer bill; top of head paler cinnamon; feathers of back tipped with cinnamon and bordered by backish; underparts white. Adult female: Resembles adult male, but feathers forward of black nape band may be mixed white and cinnamon; back and scapulars duller and less olive. Immature: Resembles adult, but crown streaked with greenish-black; back and scapulars darker; wing-coverts edged with cinnamon, in male chin and throat creamy, sides of throat, breast, and flanks cinnamon, and axillaries, under wing-coverts, abdomen, under tail-coverts paler cinnamon; in female chin and throat white and rest of underparts paler than in male. _Measurements._--Measurements are presented in table 32. _Specimens examined._--Total number, 49 (25 males, 24 females), as follows: Caroline Islands, USNM--Ponapé, 1 (Feb. 12); AMNH--Ponapé, 48 (Nov., Dec). _Molt._--Most of the specimens taken by Coultas in November and December are either worn or in molt. _Parasites._--Bequaert (1939:82 and 1941:290) records a fly (Hippoboscidae), _Ornithoica pusilla_, from the Micronesian Kingfisher at Ponapé. _Remarks._--The difference in coloration between the adults and immatures has resulted in considerable confusion concerning the taxonomy of this subspecies. According to Wiglesworth (1891a:15), the name _Halcyon reichenbachii_ was established by Gustav Hartlaub in 1852 for a kingfisher with a white abdomen in the Dresden Museum, which had been figured by Reichenbach (Synopsis Avium, Alcedineae, 1851) and called _Todiramphus cinnamomina_. This specimen had been mislabeled and Hartlaub and Finsch (1868a:4), noting a resemblance between this bird and specimens from the Palau Islands, used the name _H. reichenbachii_ for the birds from the Palaus. Later, when specimens from Ponapé were taken, Hartlaub's bird was found to be identical with them; thus the name _H. reichenbachii_ could be restricted to the bird at Ponapé, and Wiglesworth supplied the new name _H. pelewensis_ for the population at Palau. _H. mediocris_ was used by Sharpe to designate the cinnamon-breasted birds at Ponapé, because they were assumed to belong to a species different from the white-breasted ones. This confused situation was not clarified until additional collections were obtained by the Japanese. Coultas (field notes) comments on the conspicuously different field characters of the two color types in this bird. In 1930, he found the bird common and usually in marginal habitat in the lowlands and at the edges of mangrove swamps. _Evolutionary history of Halcyon cinnamomina._--The three races of kingfishers belonging to the species _H. cinnamomina_ have been derived from _H. chloris_. The principal distinction between the two species is the presence of the cinnamon coloring in _H. cinnamomina_, although within _H. chloris_ there are some subspecies possessing traces of this coloration. The link between these two species, as pointed out to me by Mayr, appears to be _H. chloris matthias_ Heinroth of the St. Matthias and Squally islands, which is colored like _H. chloris_ except that on the head, especially on the occiput, there is a faint wash of color ranging from buff to ochre. This coloration of the head is a step toward the condition in the Micronesian populations of _H. cinnamomina_. In _H. c. pelewensis_ and _H. c. reichenbachii_, the adult birds resemble each other, although the former subspecies is slightly smaller. The immatures of _H. c. reichenbachii_, however, possess cinnamon coloring on the cheeks, sides of body, and breast in addition to that present on the crown and nape. The crown and nape are of this same color in the adults. In the subspecies at Guam, _H. c. cinnamomina_, the adult male has the immature type of plumage found in _H. c. reichenbachii_. The female of _H. c. cinnamomina_ has this cinnamon coloring on the throat, but the breast, abdomen and under tail are white. The original stock from which the Micronesian birds came may have invaded the area via the Palau Islands, although Mayr (1940) is of the opinion that they reached Micronesia via Ponapé (eastern Carolines) and spread to Guam and Palau. He states further (1942b:181, 182) that the presence of _H. cinnamomina_ and _H. chloris_ as reproductively isolated groups in the Palaus may not indicate that they are distinct species, but that they represent the overlap of terminal links of the same species, which have diverged to such an extent as to leave these terminal links reproductively isolated. =Halcyon chloris teraokai= Kuroda White-collared Kingfisher _Halcyon chloris teraokai_ Kuroda, Tori, 1, 1915, p. 56, pl. 3, fig. 3. (Type locality, Pelew.) _Halcyon albicilla_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 828 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 4, 118 (Pelew); Gray (part), Hand-list Birds, 1, 1869, p. 93 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 49 (Palau, Mackenzie, Matetotas); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 171 (Pelew). _Halcyon chloris_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 93 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 10 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 14 (Pelew); Mayr, Amer. Mus. Novit., no. 469, 1931, p. 3 (Pelew). _Dacelo albicilla_ Giebel (part), Thes. Ornith., 2, 1875, p. 1 (Pelew). _Halcyon sanctus_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 50 (Palau); Sharpe, Cat. Birds British Mus., 17, 1892, p. 267 (Pelew). _Dacelo albicilla_ Giebel (part), Thes. Ornith., 2, 1875, p. 1 (Pelew). _Sauropatis chloris_ Salvadori, Ornith. Papuasia, 1, 1880, p. 470 (Pelew). _Halcyon chloris teraokai_ Uchida, Annot. Zool. Japon., 9, 1918, p. 482 (Palau); Kuroda, Ibis, 1927, p. 707 (Pelew); Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 484 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 180 (Palau); Bequaert, Mushi, 2, 1939, p. 82 (Palau); _idem_, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 290 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 201 (Babelthuap, Koror, Angaur); Mayr, Birds Southwest Pacific, 1945, p. 293 (Palau); Peters, Check-list Birds World, 5, 1945, p. 209 (Babelthuap, Koror, Angaur); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 64 (Peleliu, Garakayo). _Sauropatis chloris teraokai_ Oberholser, Proc. U. S. Nat. Mus., 55, 1919, p. 357 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 59 (Angaur); Mathews, Syst. Avium Australasianarum, 1, 1927, p. 381 (Palau). _Geographic range._--Micronesia: Palau Islands--Kayangel, Babelthuap, Koror, Garakayo, Peleliu, Angaur. _Characters._--Adult male: Dorsal surface bluish, head slightly darker, back and scapulars more greenish, rump lighter blue; outer webs of feathers of wing and of tail dark blue, entire first primary blue, inner webs of other primaries black; collar and underparts white; ariculars black with bluish wash, the black extending around neck above white band; spot on upper lores and narrow line above eye white; orbital ring and lower part of lores black; under wing-coverts white; under tail black; feet black; bill black, mandible with whitish base; iris dark brown. Adult female: Resembles adult male, but crown and back more green and less blue; auriculars with greenish-blue wash. Immature: Resembles adult, but feathers of forehead edged with buff; spot on lores and underparts buffy margined with dusky. _H. c. teraokai_ resembles closely _H. c. chloris_ (Boddaert), but more greenish and less bluish, especially on tail. _Measurements._--Measurements are listed in table 33. Adult males and females have similar measurements and are treated together. TABLE 33. MEASUREMENTS OF _Halcyon chloris_ IN MICRONESIA ==================+=====+===========+=========+=========+========= | | | | Exposed | SUBSPECIES | No. | Wing | Tail | culmen | Tarsus ------------------+-----+-----------+---------+---------+--------- _H. c. teraokai_ | 17 | 113 | 76 | 45 | 14 | | (110-116) | (72-81) | (41-52) | (13-16) | | | | | _H. c. orii_ | 9 | 111 | 80 | 44 | 16 | | (109-116) | (78-83) | (42-45) | (15-16) | | | | | _H. c. albicilla_ | 17 | 116 | 81 | 46 | 16 | | (109-119) | (78-84) | (42-49) | (14-17) | | | | | _H. c. owstoni_ | 3 | 115 | 81 | 44 | 17 | | (114-116) | (80-82) | (42-45) | (16-17) ------------------+-----+-----------+---------+---------+----------- _Specimens examined._--Total number, 53 (25 males, 28 females), as follows: Palau Islands, USNM--Garakayo, 3 (Sept. 20)--Peleliu, 14 (Aug. 27, 29, 30, 31, Sept. 1, 5, 6, Nov. 7); AMNH--exact locality not given, 36 (Oct., Nov., Dec.). _Food habits._--Unlike _H. cinnamomina_, _H. chloris_ obtains much of its food by fishing in inland waters or in tidal flats and lagoons. It does, however, obtain terrestrial foods also. Stomachs of birds taken by the NAMRU2 party at Palau contained insects, fish, crab, and shrimp. One stomach contained 3 cc. of fragments of crab, another 2 cc. of shrimp and other crustacea, and another 2 cc. of grasshoppers. Marshall (1949:210) records the house mouse as a food of this bird. _Parasites._--Uchida (1918:483) records the bird louse (Mallophaga), _Docophorus alatoclypeatus_, from this bird at Palau. Bequaert (1939:82 and 1941:290) lists the fly (Hippoboscidae), _Ornithoica pusilla_, from _H. c. teraokai_. _Remarks._--The White-collared Kingfisher at Palau is a showy and conspicuous bird. It cannot be classed as a forest bird but seems to prefer openings and marginal woodlands. Its range does not overlap that of the secretive and inconspicuous _H. cinnamomina pelewensis_, which prefers the denser forests. In 1945, the NAMRU2 party found _H. c. teraokai_ to be numerous in the cleared battle areas at Peleliu and Angaur. A favorite perch of this bird was the telephone lines, from which a number of our specimens were shot. Usually the bird was observed singly; occasionally two birds were found together. A pair was seen in copulation on August 29. The call of this bird, a loud and harsh rattle, is noticeably different from the low rasping note of _H. c. pelewensis_. Coultas found _H. c. teraokai_ to be numerous in 1931. He comments (field notes) that the bird frequents salt water areas, especially the mangrove swamps. He noted the bird fishing at the outer reef. =Halcyon chloris orii= Takatsukasa and Yamashina White-collared Kingfisher _Halcyon chloris orii_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 484. (Type locality, Rota.) _Halcyon albicillus_ Sharpe (part), Cat. Birds British Mus., 17, 1892, p. 249 (Marianne = Rota). _Halcyon albicilla_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 169 (Rota); Hartert (part), Novit. Zool., 5, 1898, p. 53 (Rota). _Sauropatis albicillus_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 58 (Rota). _Halcyon chloris orii_] Hand-list Japanese Birds, rev., 1932, p. 180 (Rota); Hand-list Japanese Birds, 3d ed., 1942, p. 200 (Rota, Saipan as straggler); Mayr, Birds Southwest Pacific, 1945, p. 293 (Rota); Peters, Check-list Birds World, 5, 1945, p. 210 (Rota); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 64 (Rota). _Geographic range._--Micronesia: Mariana Islands--Rota. _Characters._--Adult: Resembles _H. c. teraokai_, but loral spot larger and more buffy; occiput lightly streaked with white and white line above eye; top of head and back more oily green and less blue, darker in female. Immature: Resembles adult, but underparts and loral spot buffy with dusky edges; feathers of forehead tipped with buff; remainder of upper parts slightly darker. _Measurements._--Measurements are listed in table 33. _Weights._--The author (1948:64) lists the weights of two adult females as 84 and 85. _Specimens examined._--Total number, 11 (4 males, 6 females, 1 unsexed), from Mariana Islands, USNM--Rota (Oct. 18, 19, 22, 26, Nov. 2). _Molt._--The 11 specimens taken by the NAMRU2 party at Rota in October and November are in molt. _Remarks._--The kingfisher at Rota was taken by Marche in June and July, 1888, and reported by Oustalet (1895:169). It was taken later by the Japanese and described by Takatsukasa and Yamashina as a new subspecies. Apparently, no other specimens were taken until the NAMRU party visited Rota in October and November, 1945, and obtained 11 skins. The bird is conspicuous and common at Rota. The color characters of white feathers intermingled with the bluish coloring of the crown and the occiput and the large, whitish loral spot place this subspecies as intermediate between _H. c. teraokai_ and the two subspecies known from the more northern Marianas. =Halcyon chloris albicilla= (Dumont) White-headed Kingfisher _Alcedo albicilla_ Dumont, Dict. Sci. Nat., éd. Levrault, 29, 1823, p. 273. (Type locality, Marianne = Tinian.) _Alcedo albicilla_ Pucheran, Rev. et Mag. Zool., 1853, p. 388 (Marianne = Tinian); Hartlaub, Journ. f. Ornith., 1855, p. 423 (Mariannen = Tinian); Cassin, U. S. Expl. Exped. 1838-'42, 1858, p. 225 (Mariannes = Tinian). _Todiramphus albicilla_ Reichenbach, Syn. Avium, Alcedineae, 1851, p. 30 (Mariannen = Tinian). _Halcyon albicilla_ Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen = Tinian); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 5 (Ladrone or Marian Islands = Tinian); Gray (part), Hand-list Birds, 1, 1869, p. 93 (Mariannes = Tinian); Oustalet, Le Nat., 1889, p. 260, (Saypan); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 14 (Marianne = Tinian); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 169 (Saypan); Hartert (part), Novit. Zool., 5, 1898, p. 52 (Saipan); Matschie, Journ. f. Ornith., 1901, pp. 112, 113, 114 (Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 45 (Saipan). _Dacelo albicilla_ Giebel (part), Thes. Ornith., 2, 1875, p. 1 (Marianne = Tinian). _Sauropatis albicilla_ Salvadori, Ornith. Papuasia, 1, 1880, p. 470 (Marianne = Tinian). _Halcyon albicillus_ Sharpe (part), Cat. Birds British Mus., 17, 1892, p. 249 (Marianne = Saipan). _Halcyon saurophagus_ Schnee, Zeitschr. f. Naturwisch., 82, 1912, p. 463 (Saipan). _Sauropatis albicillus_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 58 (Saipan). _Leucalcyon albicilla albicilla_ Mathews (part), Syst. Avium Australasianarum, 1, 1927, p. 376 (Saipan). _Halcyon chloris albicilla_, Hand-list Japanese Birds, rev., 1932, p. 180 (Saipan, Tinian); Hand-list Japanese Birds, 3d ed., 1942, p. 200 (Saipan, Tinian, Yap?); Mayr, Birds Southwest Pacific, 1945, p. 293 (Saipan, Tinian); Peters, Check-list Birds World, 5, 1945, p. 210 (Saipan, Tinian); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 97 (Tinian); Stott, Auk, 64, 1947, p. 526 (Saipan). _Geographic range._--Micronesia: Mariana Islands--Saipan, Tinian. _Characters._--Adult: Resembles _H. c. teraokai_, but slightly larger; pileum white; white collar broad; black band on nape narrow and faint in some individuals; back and scapulars more oily green and less blue. Immature: Resembles adult, but pileum pale buff streaked with bluish-green; back and scapulars darker; upper wing-coverts edged with white; breast feathers edged with dusky black. _Measurements._--Measurements are listed in table 33. _Specimens examined._--Total number, 20 (12 males, 8 females), as follows: Mariana Islands, USNM--Saipan, 1 (Sept. 27)--Tinian, 4 (Oct. 18, 23, 26); AMNH--Saipan, 11 (July 8, 9, 11, 13, 15, 17, August 5, 21, 26)--Tinian, 4 (Sept. 7, 8, 10). _Nesting._--Hartert (1898:42) records an egg found in a hole of a tree at Saipan on July 31, 1895. He writes that the egg "is only slightly glossy, very thin, pure white, but soiled all over with deep brown spots, evidently from the decaying wood in the nest hole. It measures 33:25 mm." _Molt._--Most of the birds taken in July, August, September, and October are in molt. _Remarks._--Quoy and Gaimard, who visited the Marianas while on the expedition in the "Uranie," obtained this kingfisher at Tinian. Additional material was taken by Marche in 1887 at Saipan and by Owston's Japanese collectors in 1895. In 1932, Coultas (field notes) found the bird to be common on both Tinian and Saipan, especially in open country. At Saipan, Stott (1947:526) found the birds as singles or in pairs on wooded hillsides. At Tinian, Gleise (1945:220) estimated the population in 1945 as 150. The completely white head in _H. c. albicilla_ closely resembles that in _H. s. saurophaga_ Gould of Melanesia. These two species resemble each other in several other respects. _H. saurophaga_ is smaller than _H. chloris_ with black or greenish blue on the anterior part of the ear-coverts and the color of the back, wings, and tail is more greenish. The presence of both _H. saurophaga_ and _H. chloris_ on the same islands in Melanesia is an indication that the two groups are specifically distinct. =Halcyon chloris owstoni= Rothschild White-collared Kingfisher _Halcyon owstoni_ Rothschild, Bull. British Ornith. Club, 15, 1904, p. 6. (Type locality, Asuncion.) _Halcyon albicillus Sharpe_ (part), Cat. Birds British Mus., 17, 1892, p. 249 (Marianne = Pagan, Agrigan). _Halcyon albicilla_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, pp. 169, 170 (Pagan, Agrigan); Hartert, Novit. Zool., 5, 1898, p. 52 (Pagan, Agrigan). _Sauropatis chloris owstoni_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 59 (Asuncion). _Leucalcyon albicilla owstoni_ Mathews, Syst. Avium Australasianarum, 1, 1927, p. 376 (Asuncion). _Halcyon chloris owstoni_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 484 (Asuncion); Hand-list Japanese Birds, rev., 1932, p. 180 (Asuncion); Hand-list Japanese Birds, 3d ed., 1942, p. 200 (Assongsong, Pagan, Almagan); Mayr, Birds Southwest Pacific, 1945, p. 293 (Almagan, Pagan, Agrigan, Asuncion); Peters, Checklist Birds World, 5, 1945, p. 209 (Asuncion, Pagan, Alamagan); Borror, Auk, 64, 1947, p. 417 (Agrigan). _Geographic range._--Micronesia: Mariana Islands--Asuncion, Agrigan, Pagan, Almagan. _Characters._--Adult: Resembles _H. c. albicilla_, but hind part of crown blue-green and black collar broader. Immature: Resembles adult, but forehead buffy and edges of feathering on anterior crown, upper wing-coverts, and tips of secondaries brownish. _Measurements._--Measurements are listed in table 33. _Specimens examined._--Total number, 4 (2 males, 1 female, 1 unsexed), as follows: Mariana Islands, AMNH--Asuncion, 4 (Jan., July). _Remarks._--Marche obtained specimens of this bird at Pagan in November, 1887, and at Agrigan in December, 1888, and in February, 1889. Owston's Japanese collectors obtained birds at Asuncion in 1904, which were named as new by Rothschild. Apparently he used an immature specimen in preparing the diagnosis of his new subspecies. Borror (1947:417) visited Agrigan in 1945 and obtained specimens of this kingfisher. He reports that the bird is a "common and abundant species and probably nests on the island." _Evolutionary history of Halcyon chloris in Micronesia._--_Halcyon chloris_ is distributed from eastern Africa at the Red Sea eastward through southern Asia to Malaysia, Australia and the Pacific islands. Peters (1945:207-213) recognized 47 subspecies within this species. In its colonization of Micronesia, _H. chloris_ apparently arrived first at the Palaus probably from the Philippines or the Moluccas. Whether _H. cinnamomina_ was established at Palau prior to the arrival of _H. chloris_ is unknown. _H. chloris teraokai_ dominates most of the available habitats at Palau, although it has differentiated but little from subspecies to the west and southwest of Palau. Among named kinds it most closely resembles _H. c. chloris_ (Boddaert) of the Moluccas, Lesser Sundas and adjacent areas in color and structure. The species did not succeed in establishing itself in the Carolines or at Guam, but did so in the Marianas at Rota and northward. In comparison with other subspecies of _H. chloris_ those in the Marianas are characterized by a slight increase in size and a replacement of the bluish-green coloring of the head either partly or wholly by white. It is noteworthy that on the islands of Tinian and Saipan, which occupy a geographically intermediate position in the Mariana chain, the bird has an almost completely white head, whereas the birds on islands to the north and south have only partly white heads. The geographic ranges of _H. chloris_ and _H. cinnamomina_ in Micronesia overlap only at Palau as shown by Mayr (1942b:181). Even here each is restricted to a different habitat. Possibly the present ranges resulted from competition between each group, and both may have had more extensive ranges in Micronesia in the past. Another possibility is that the original stock of _H. chloris_ arrived in Micronesia via the Palaus and that of _H. cinnamomina_ via Ponapé (eastern Carolinas), and that the resulting successful colonizations were a matter of chance. If this were the case the present day ranges may represent the total amount of dispersal that has taken place. The absence of kingfishers from Kusaie, Yap, Truk and other apparently suitable islands favors this possibility. =Eurystomus orientalis connectens= Stresemann Dollar Bird _Eurystomus orientalis connectens_ Stresemann, Novit. Zool., 20, 1913, p. 302. (Type locality, Moa.) _Eurystomus orientalis connectens_ Yamashina, Tori, 10, 1940, p. 675 (Babelthuap); Hand-list Japanese Birds, 3d ed., 1942, p. 199 (Babelthuap). _Eurystomus orientalis pacificus_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Celebes and adjacent islands, Lesser Sunda Islands from Lombock to Damar, Southeastern Islands. In Micronesia: Palau Islands--Babelthuap. _Remarks._--Yamashina (1940:675) records an adult male taken at Babelthuap in 1938. He assigns it to _E. o. connectens_, comparing it with a series of 15 specimens of this race from Celebes, Halmahera and Batchian. Mayr (1045a:302) refers this visitor to Palau to _E. o. pacificus_ (Latham); this form is migratory and may fly north from Australia to the Melanesian area between breeding seasons. =Hirundo rustica gutturalis= Scopoli Eastern Barn Swallow _Hirundo gutturalis_ Scopoli, Del. Flor. et Faune, Insubr., 2, 1786, p. 96. (Type locality, "in Nova Guinea," error = Panay, Philippine Islands.) _Hirundo rustica_ Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 112 (Yap); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap). _Hirundo rustica gutturalis_ Hand-list Japanese Birds, rev., 1932, p. 178 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 198 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau); Baker, Smithson. Mus. Coll., vol. 107, no. 15, 1948, p. 65 (Guam, Angaur, Ngesebus). _Geographic range._--Breeds in northeastern Asia, winters south to Australia and Pacific islands. In Micronesia: Mariana Islands--Guam, Tinian; Palau Islands--Babelthuap, Koror, Ngesebus, Peleliu, Angaur; Caroline Islands--Yap. _Specimens examined._--Total number, 13 (9 males, 3 females, 1 unsexed), as follows: Mariana Islands, USNM--Tinian, 10 (Oct. 23, 25); Palau Islands, USNM--Babelthuap, 1 (Nov. 27)--Angaur, 1 (Sept. 21); AMNH--exact locality not given, 1 (Oct. 26). _Remarks._--This swallow is a winter migrant to western Micronesia from Asia. In the Palau Islands in September, 1945, the NAMRU2 party saw the swallow at Ngesebus and Angaur in small flocks. At Guam, the NAMRU2 party saw one bird on October 7 and four birds flying near Agaña River on October 11. Strophlet (1946:535) saw one bird on October 28, 1945, and six birds on November 16 at Guam. Marshall (1949:221) found swallows at Tinian, Saipan and Palau from October to February. He found only immature birds. =Edolisoma tenuirostre monachum= (Hartlaub and Finsch) Cicada Bird _Campephaga monacha_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 99. (Type locality, Pelew Islands.) _Volvocivora monacha_ Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 19, pl. 3, fig. 2-3 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, p. 28 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau). _Lalage monacha_ Sharpe, Cat. Birds British Mus., 4, 1879, p. 105 (Pelew); Tristram, Cat. Birds, 1889, p. 186 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 25 (Pelew); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 53 (Palau); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Palau); Dubois, Syn. Avium., 1, 1902, p. 303 (Pelew); Reichenow, Die Vögel, 2, 1914, p. 276 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 68 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 175 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 194 (Babelthuap, Koror). _Edolisoma monacha_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 541 (Pelew). _Edolisoma tenuirostre monacha_ Stresemann, Ornith. Monatsber., 47, 1939, p. 126 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 294 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 65 (Peleliu). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Peleliu. _Characters._--Adult male: Forehead, crown, nape, back, and underparts near "Tyrian blue"; auriculars darker than back; lores and chin black; throat black washed with blue gray; wing feathers black, margined with pale blue; black tail tipped with whitish, and basal part of middle two rectrices colored like back; under wing dark except for whitish inner margins of secondaries; bill and feet black; iris dark brown. Adult female: Resembles adult male, but forehead and under eye pale buff; superciliary stripe darker buff; crown, nape, and sides of neck dark slate-blue; mantle brown, feathers with buffy centers; back brown washed with burnt brown; feathers of rump and upper tail-coverts with terminal black bar edged with buff; wing and tail brownish-black, primaries margined with buff, innermost three secondaries and upper wing-coverts broadly edged with lighter buff, tail tipped with buff, more broadly so on outermost tail feathers, two outermost tail feathers with outer edge buff; two central tail feathers basally dark ochre; ear-coverts buff, tinged with black; chin, throat, and under wing-coverts deep buff; breast, abdomen, and flanks buff, feathers with subterminal blackish bar; under tail buff. Immature: Resembles adult female, but crown, nape, and sides of neck brown; back faintly mottled with buff; tail feathers and primary wing-coverts tipped with white; younger birds may have upper parts margined with pale buff. _Measurements._--Measurements are listed in table 34. _Specimens examined._--Total number, 23 (13 males, 10 females), as follows: Palau Islands, USNM--Koror, 4 (Nov. 6, 14, 26, Dec. 5)--Peleliu, 2 (Aug. 29, 30); AMNH--exact locality not given, 17 (Oct., Nov., Dec.). TABLE 34. MEASUREMENTS OF _Edolisoma tenuirostre_ IN MICRONESIA -------------------+------+----------+---------+-----------+----------- | | | | Exposed | SUBSPECIES | No. | Wing | Tail | culmen | Tarsus -------------------+------+----------+---------+-----------+----------- | | | | | _E. t. monachum_ | 10 | 98 | 80 | 21.0 | 23.0 | | 96-103 | 76-83 | 20.0-22.5 | 22.5-24. | | | | | _E. t. insperatum_ | 35 | 109 | 86 | 23.0 | 24.0 | | 107-112 | 82-91 | 22.0-24.0 | 23.0-25.0 | | | | | -------------------+------+----------+---------+-----------+----------- _Molt._--Molt in this bird appears to take place in the period from August to December. Most of the specimens taken in August, October, November and December were in molt. None was taken in other months. _Food habits._--This bird feeds principally on insects. A female taken on August 29 had in its stomach about one and a half cc. of parts of grasshopper. Marshall (1949:212) records both animal and vegetable matter in the stomach of this bird. _Remarks._--The Cicada Bird at Palau inhabits the jungles, especially the marginal areas between the thick jungle and the more open woodlands. In 1945, the NAMRU2 party observed only two birds, both of which were obtained. These were found at Peleliu in a small area of undisturbed woodland at the edge of a mangrove swamp. Each bird was perched approximately 25 feet above the ground on the outer branches of a densely foliated tree. The bird is thought not to be so rare as our records indicate; probably its secretive habits conceal it from man except as he makes special search for it. Coultas (field notes) describes the bird as one of the true forest. He found it shy and retiring and possessing a very weak voice. It may be noted that Delacour (1946:2) does not accept the genus _Edolisoma_ but places birds which are currently assigned to it in the genus _Coracina_. =Edolisoma tenuirostre nesiotis= (Hartlaub and Finsch) Cicada Bird _Campephaga nesiotis_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 98. (Type locality, Uap.) _Campehaga nesiotis_ Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap). _Volvocivora nesiotis_ Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 28 (Yap). _Edoliisoma nesiotis_ Sharpe, Cat. Birds British Mus., 4, 1879, p. 56 (Yap); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 25 (Uap); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 53 (Yap); Matschie, Journ. f. Ornith., 1901, p. 112 (Yap); Dubois, Syn. Avium, 1, 1902, p. 299 (Uap); Reichenow, Die Vögel, 2, 1914, p. 274 (Karolinen = Yap); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 68 (Mackenzie, Yap). _Edolisoma nesiotis_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 542 (Mackenzie group); Hand-list Japanese Birds, rev., 1932, p. 174 (Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 194 (Yap). _Edolisoma tenuirostre nesiotis_ Stresemann, Ornith. Monatsber., 49, 1939, p. 126 (Yap); Mayr, Birds Southwest Pacific, 1945, p. 294 (Yap). _Geographic range._--Micronesia: Caroline Islands--Yap. _Characters._--Adult male: Resembles adult male of _E. t. monachum_. Adult female: Resembles adult female of _E. t. monachum_, but wings and upper parts less buffy and more rufous; eye-stripe rufous; breast barred on sides only. _Remarks._--No specimen of the Cicada Bird from Yap has been examined by me. For a long time this bird was thought to be a species distinct from any other member of this genus, but Stresemann (1939:126) arranged it as a subspecies of _Edolisoma tenuirostre_. The type specimen is an immature, and the adult is unknown. The presence of rufous coloring shows a relationship with _E. t. insperatum_ of Ponapé, but Mayr, who has examined the type of _E. t. nesiotis_ in the Hamburg Museum, and has obligingly showed me his notes on the bird, says that it has a greater resemblance to the Cicada Bird at Palau especially because of the amount of barring on the underparts. The true status of this bird, as well as that of other members of the avifauna of Yap, will be incompletely known until such time as good collections are available from this island group. =Edolisoma tenuirostre insperatum= (Finsch) Cicada Bird _Volvocivora inseperata_ Finsch, Proc. Zool. Soc. London, 1875, (1876), p. 644. (Type locality, Ponapé.) _Volvocivora insperata_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 17, 27 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 779 (Ponapé); _idem_, Ibis, 1881, pp. 110, 112, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé). _Volvozivora insperata_ Finsch, Journ. f. Ornith., 1880, p. 289 (Ponapé). _Lalage insperata_ Sharpe, Cat. Birds British Mus., 4, 1879, p. 108 (Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 25 (Ponapé); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 53 (Ponapé); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Ponapé); Reichenow, Die Vögel, 2, 1914, p. 276 (Karolinen = Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 68 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 174 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 194 (Ponapé). _Lisomada insperata_ Mathews, Novit. Zool., 24, 1928, p. 372 (new generic name); _idem_, Syst. Avium Australasianarum, 2, 1930, p. 545 (Ponapé). _Edolisoma tenuirostre insperata_ Stresemann, Ornith. Monatsber., 47, 1939, p. 126 (Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 294 (Ponapé). _Edolisoma tenuirostre_ Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult male: Resembles adult male of _E. t. monachum_, but larger; upper parts more grayish-blue; wings with outer edges bluish-gray and inner webbings grayish-white; central tail feathers with subterminal, roundish, black spots; two outermost tail feathers black tipped with broad, pale bluish-gray coloring; lores more bluish-gray and less black; ear-coverts pale bluish-gray; chin, throat, breast, abdomen, flanks, under wing, and under tail-coverts grayish-blue; bill and feet black; iris dark brown. Adult female: Resembles adult female of _E. t. monachum_, but larger; forehead slate-gray; crown brownish-gray, browner on nape; back chocolate-brown; rump rufous; upper tail-coverts more cinnamon; wing and tail brownish-black, outer margins of primaries edged with buff; outer margins of secondaries and upper wing-coverts except primary wing-coverts edged with rufous; central tail feathers like back but tipped with buff, other tail feathers more broadly tipped with buff; lores grayish-black; malar stripe to auriculars darker and more brownish-black with lighter shafts; underparts rufous, under wing paler and more buffy. Immature: Resembles adult female, but forehead grayish tinged with ochre; crown and neck brown becoming slightly more reddish on back and more burnt reddish-brown on rump; tail edged and tipped with buff; primaries tipped with whitish, secondaries broadly edged with buff, primary wing-coverts tipped with buffy-white; lores blackish; ear-coverts rufous with lighter shafts; tail feathers pointed while in adult more rounded. Younger birds resemble older ones, but plumage except wings and tail may be spotted or barred with buff and black with whitish margins. _Measurements._--Measurements are listed in table 34. _Specimens examined._--Total number, 46 (23 males, 23 females), from Caroline Islands, AMNH--Ponapé (Nov., Dec.). _Nesting._--Coultas (field notes) writes that the nest is cup-shaped, made of grasses and strands of hair fern, and placed at low elevations in small trees and bushes. He was told that two eggs are laid. He comments that the nesting season had just been completed in November and December (the time of his visit to Ponapé), because he noted juveniles being attended and fed by the adults. _Molt._--Most of the specimens taken by Coultas in November and December are in fresh plumage or in the final stages of molt, indicating that the molt was initiated possibly in September and would be completed possibly in January. This time of molt appears to be approximately one month later than the time of molt of _E. t. monachum_ of Palau. Probably the bird at the Palau Islands breeds slightly earlier in the year than the subspecies on Ponapé. Examination of the large series of birds taken by Coultas at Ponapé shows the presence of three types of plumages. The writer has not made a thorough diagnosis of these plumages, but suspects that the phenomenon obtained here is the same as was found by Mayr (1933e) in his study of _Neolalage banksiana_ (Gray), which is a related bird. Immatures of _E. t. insperatum_ seemingly present two plumages, which, if Mayr's arrangement is followed, may be interpreted as a more primitive or "retarded" type in one case, with less striking plumage, barred with black and buff, and a more advanced or "progressive" type in the other case, with plumage of the latter resembling more the adult type, especially the adult female. It was not ascertained whether any of these specimens represented adult birds in "retarded" plumage. _Remarks._--The Cicada Bird at Ponapé resembles in habits its related subspecies at Palau. Coultas (field notes) writes that it is a forest bird, with retiring habits. He observed the birds in small groups, and describes their musical call notes as "to-to-wee, to-to-wee" repeated several times. _Evolutionary history of Edolisoma tenuirostre in Micronesia._--Mayr (in Stresemann, 1939:126) first pointed out the close relationship between the cicada birds of Micronesia and _Edolisoma tenuirostre_ of the Solomon Islands. Up to that time the Micronesian birds were considered to belong to the genus _Lalage_. The cicada birds probably invaded Micronesia along two independent routes from a dispersal center in the Papuan area. The form at Palau, _E. t. monachum_, resembles closely several of the subspecies to the south and southwest, particularly those in the New Guinea area. Aside from the smaller size of the Palau form there are differences in coloration between this bird and those of Melanesia. In the adult female and the juvenile there are differences in the amount of barring on the underparts and in the shade of color on the upper parts. In the adult male there are differences in the marginal coloring of the primaries and secondaries. _E. t. nesiotis_ may have arrived at Yap from Palau. Little is known concerning the taxonomic position of this bird. On the basis of the information available, it appears closer to the Palau bird than the Ponapé bird in color; however, in size it probably more closely approaches the latter subspecies. The Ponapé Cicada Bird, _E. t. insperatum_, appears to represent a colonization distinct from that which established the populations at Yap and Palau. This conclusion is based on the fact that the adult female of _E. t. insperatum_ has distinctive reddish coloring and lacks the barring on the underparts, and that it may have been derived from an ancestral stock, which was reddish and not barred, such as _E. t. remotum_ of the New Ireland area. The three subspecies in Micronesia may represent remnants of a single colonization, since additional material from Yap may prove that this island population has characters intermediate between those of the other subspecies of Micronesia. =Dicrurus macrocercus harterti= S. Baker Black Drongo _Dicrurus ater harterti_ S. Baker, Novit. Zool., 26, 1918, p. 299. (Type locality, Formosa.) _Dicrurus macrocercus_ Baker, Trans. 11th N. Amer. Wildlife Conf., 1946, p. 211 (Rota). _Dicrurus macrocercus harterti_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 65 (Rota). _Geographic range._--Formosa. In Micronesia: Mariana Islands--Rota (introduced). _Specimens examined._--Total number, 7 (4 males, 3 females), from Mariana Islands, USNM--Rota (Oct. 18, 19, Nov. 2). _Remarks._--This drongo was introduced from Formosa to Rota by the Japanese South Seas Development Company (Nanyo Kohatsu Kabushiki Kaisha) apparently in 1935. An illustrated booklet, printed by this organization and seen by members of the NAMRU2 party at the Rota Civil Government headquarters, showed pictures of the captive birds before release and indicated that they had been brought to Rota for the purpose of controlling destructive insects. Dr. Charles Vaurie has examined these birds and compared them with a series of drongos from Formosa in the collection of the American Museum of Natural History. The drongo appears well adapted at Rota, where it prefers cultivated areas and the bombed village sites to thick woodlands. Birds were found in small flocks often perched in large shade trees in village areas. Weights of two immature males are 53 and 61 grams. One adult male measures: wing, 144, tail, 153, culmen, 26, tarsus, 22. =Corvus kubaryi= Reichenow Marianas Crow _Corvus Kubaryi_ Reichenow, Journ. f. Ornith., 1885, p. 110. (Type locality, Palau, error = Guam.) _Corvus solitarius_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 305 (Guahan); Bonaparte, Comptes Rendus Acad. Sci. Paris, 37, 1853, p. 830 (Mariannes); Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 143 (Guahan); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 216 (Guam and Rota). _Corvus_ spec. Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen); Gray, Hand-list Birds, 2, 1870, p. 12 (Marianne). _Corvus kubaryi_ Hartert, Novit. Zool., 5, 1898, p. 59 (Guam, Rota); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Matschie, Journ. f. Ornith., 1901, p. 112 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1901, p. 55 (Guam); Safford, Osprey, 1902, p. 69 (Guam); _idem_, The Plant World, 7, 1904, pp. 3, 264 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Prowazek, Die deutschen Marianen, 1913, pp. 87, 102 (Marianen); Reichenow, Die Vögel, 2, 1914, p. 306 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Marianne); Cox, Island of Guam, 1917, p. 21 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 69 (Guam, Rota); Meinertzhagen, Novit. Zool., 33, 1926, p. 73 (Guam); Hand-list Japanese Birds, rev., 1932, p. 169 (Guam, Rota); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 25 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 187 (Guam, Rota); Mayr, Birds Southwest Pacific, 1945, p. 298 (Guam, Rota); Watson, The Raven, 17, 1946, p. 41 (Guam); Wharton, Ecol. Monogr., 16, 1946, p. 174 (Guam); Strophlet, Auk, 1946, p. 540 (Guam); Baker, Ecol. Monogr., 16, 1946, p. 408 (Guam); _idem_, Condor, 49, 1947, p. 125 (Guam); _idem_, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 66 (Guam, Rota). _Corone phillipina_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 46 (Marianne). _Corone kubaryi_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 46 (Pelew, error = Guam). _Geographic range._--Micronesia: Mariana Islands--Guam, Rota. _Characters._--Adult: A small, black crow with a slight greenish-black gloss on head; back, wings, and tail with bluish-black gloss; underparts with dull, greenish-black gloss; bases of feathers light grayish, more nearly white on neck, producing a somewhat ragged appearance; nasal bristles short but extending over nostrils and base of culmen; bill and feet black; iris dark brown. Female smaller. Immature: Resembles adult, but feathers with less gloss; wings and tail browner. _Measurements._--Measurements of _Corvus kubaryi_ are listed in table 35. _Weights._--The NAMRU2 party obtained weights of the Marianas Crow as follows: from Guam, 5 males, 231-270 (256), 11 females, 205-260 (242); from Rota, 1 male, 256; 1 female, 260 grams. TABLE 35. MEASUREMENTS OF _Corvus kubaryi_ =========+===========+===========+===========+=========+========= | Number | | | Full | LOCATION | and sex | Wing | Tail | culmen | Tarsus ---------+-----------+-----------+-----------+---------+--------- Guam | 9 males | 236 | 165 | 55 | 51 | | (229-244) | (158-170) | (51-57) | (49-52) | 19 females| 227 | 151 | 50 | 50 | | (222-241) | (143-166) | (47-54) | (46-54) | | | | | Rota | 3 males | 235 | 167 | 54 | 50 | | (233-236) | (166-169) | (53-56) | (49-51) ---------+-----------+-----------+-----------+---------+--------- _Specimens examined._--Total number, 49 (20 males, 27 females, 2 unsexed), as follows: Mariana Islands, USNM--Guam, 26 (May 25, 29, June 4, 7, 8, 9, 18, 28, 29, July 10, 12, 18, Sept. 5, 11)--Rota, 4 (Oct. 22, 25, 29); AMNH--Guam, 19 (Jan., Feb., March, Aug., Sept., Dec.). _Nesting._--In the spring of 1945, the NAMRU2 party obtained records of nesting activities by crows. One nest was observed on March 8 in a banyan tree. Specimens collected from May to September were not in breeding condition, and it is thought that the nesting period is concentrated in the winter and spring months. Watson (1946:41) reports finding a young crow being fed on May 8 by an adult. _Molt._--The Marianas Crow molts in the period from May to August or September. Most of the birds taken by the NAMRU2 party in this period were in the process of molt. Skins obtained at Rota in late October also exhibit signs of molt. Specimens taken in December, January and February are in fresh or slightly worn plumage. The crow presents an exceedingly shabby appearance in molt, because the grayish and whitish basal parts of the feathers are exposed. _Food habits._--The crow is an omnivorous feeder. Stomachs examined contained both plant and animal food. Both Seale (1901:55) and Safford (1905:79) comment on the damage which the crow does to the corn crop at Guam. Seale remarks that the crow has a reputation for plundering nests of other birds. The NAMRU2 party saw crows being chased by starlings on several occasions. _Parasites._--Wharton (1946:174) obtained the chigger (Acarina), _Trombicula_ sp., from the crow at Guam. _Remarks._--The Marianas Crow is confined to the forested areas and to the coconut plantations at Guam. The birds were seen as singles or in small flocks, often along the roadways. In a count of the number of birds seen along the roadways of Guam, the author (1947:124) found crows to constitute 2.4 per cent of the total population of birds counted and observed the crow on 21.6 per cent of the 125 roadway counts made. Coultas (field notes) noted the birds at the northern part of Guam. The NAMRU2 party found the birds distributed in most parts of the island but usually they were infrequent near areas where large numbers of service personnel were stationed. The birds were often noisy when flying in small flocks or in pairs; Seale (1901:55) also notes this. When observed in jungle areas, the birds were generally quiet, feeding and perching in dense foliage. At Rota, the NAMRU2 party found the bird to be fairly numerous and with habits resembling those of the crow at Guam. No differences in color or structure could be found between the specimens of crows obtained at the two islands. Kittlitz (1836:305) was the first person to write an account of the crow at Guam. He called it _Corvus solitarius_ and remarked that he later found the same species in the Philippines. Wiglesworth (1891a:46) also considered the crow at Guam to resemble one found in the Philippines and called it _Corone phillipina_. Later Reichenow named the bird _Corvus kubaryi_ with the type locality as the Palau Islands. This locality proved to be erroneous and the bird was judged to be from Guam by Hartert (1898:59), who did not use the name _C. solitarius_ because it was a _nomen nudum_, and recognized _C. kubaryi_ as the correct name. _Evolutionary history of Corvus kubaryi._--Meinertzhagen (1926:59) writes that "Environmental influences seem to be mainly, if not entirely, responsible for geographic differences in the genus _Corvus_." Such may be the case in _C. kubaryi_, which is a small, dull-colored crow with a relatively unmodified bill. In structure, it has little resemblance to other crows found in the Pacific area. Kittlitz was the first to note a resemblance between the bird at Guam and one in the Philippines. Oustalet (1896:70) wrote that the bird at Guam is related to crows of the Moluccas and New Guinea. Although not closely related to the Hawaiian Crow, _C. tropicus_, both have little gloss on their feathers, a character which is common to many of the insular populations of crows. Mayr (1943:46) is of the opinion that the Hawaiian bird was derived from a North American ancestor, although Bryan (1941:187) suggests that it is related to _C. macrorhynchus_ of southeastern Asia and remarks that the Hawaiian Crow, "has some relation to the Guam Crow." In looking for the ancestral stock of _C. kubaryi_, the several species of crows which occur to the north, west and south of the Marianas have been examined. In size and general structure, _C. kubaryi_ appears to be closest to the _C. enca_ group, and not as closely related to the _C. macrorhynchus_ group. The small size, the shape of the culmen, the lack of pointed feathers on the breast, and the presence of white on the basal parts of the feathers of the nape are characters which _C. kubaryi_ has in common with _C. enca_. Nasal bristles cover the frontal base of the culmen in _C. kubaryi_; this character is found also in _C. enca florensis_. _C. kubaryi_ differs from the _C. enca_ group by lacking the purple sheen on the upper parts; this sheen is conspicuous in the latter species. _C. kubaryi_ appears to have little in common with _C. meeki_ of the Solomons and _C. orru_ of the Moluccas and New Guinea area. There is apparently no close relation between the Marianas Crow and the crow which reaches the Bonins. The latter crow, according to the Hand-list of Japanese Birds (Hachisuka _et al._, 1932:1), is called _C. coronoides hondoensis_ Momiyama and is apparently now extinct in the Bonins. In summary, it may be said that _C. kubaryi_ is an isolated and modified species of crow, which probably has been living at Guam and Rota for a considerable length of time. Whether it once lived on other islands in Micronesia is unknown, but it is entirely possible that the present population may represent a remnant of one which formerly had a more extensive distribution. The characters which show its distinctness from possible ancestral species include its small size, its slender bill, and its dull coloration. It is thought to have been derived from the _C. enca_ group, _C. e. pusillus_ of the Philippines or _C. e. celebensis_ of the Celebean area. =Luscinia calliope calliope= (Pallas) Siberian Rubythroat _Motacilla Calliope_ Pallas, Reise durch versch. Prov. russ. Reichs, 3, 1776, pp. 261, 325, 697. (Type locality, Yenesei.) _Luscinia calliope calliope_ Hand-list Japanese Birds, rev., 1932, p. 178 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in northeastern Asia. Winters south to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Siberian Rubythroat is considered to be a casual winter visitor to the Palau Islands. =Monticola solitaria philippensis= (Müller) Chinese Blue Rock Thrush _Turdus philippensis_ Müller, Natursystem Supplements- und Register-Band, 1776, p. 145. (Type locality, Philippine Islands, _ex_ Buffon.) _Monticola philippensis philippensis_ Hand-list Japanese Birds, rev., 1932, p. 177 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Monticola solitarius philippensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Koror). _Geographic range._--Breeds in northeastern Asia and Japan. Winters south to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Chinese Blue Rock Thrush is apparently an infrequent winter visitor to the Palau Islands. =Turdus obscurus obscurus= Gmelin Dusky Thrush _Turdus obscuras_ Gmelin, Syst. Nat., 1, 1789, p. 816. (Type locality, Lake Baikal.) _Turdus obscuras_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 96 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 22 (Palau); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 66 (Pelew). _Merula obscura_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 39 (Pelew). _Turdus obscuras obscuras_ Hand-list Japanese Birds, rev., 1932, p. 177 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Koror); Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in northeastern Asia. Winters south to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Dusky Thrush is considered to be a casual winter visitor to the Palau Islands. It was first taken there by Captain Heinsohn, according to Hartlaub and Finsch (1872:96). =Psamathia annae= Hartlaub and Finsch Palau Bush-warbler _Psamathia annae_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 5, pl. 2. (Type locality, Pelew Islands.) _Psamathia annae_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 116, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 94 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 5, 22 (Palau); Nehrkorn, Journ. f. Ornith., 1879, pp. 399, 404 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Sharpe, Cat. Birds British Mus., 7, 1883, p. 101 (Pelew); Tristram, Cat. Birds, 1889, p. 155 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 40 (Pelew); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 57 (Palau); Matschie, Journ. f. Ornith., 1901, p. 112 (Palau); Reichenow, Die Vögel, 2, 1914, p. 536 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 67 (Pelew); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 629 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 177 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 196 (Babelthuap, Koror, Peleliu); Delacour, Ibis, 84, 1942, p. 514 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 294 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 197 (Peleliu, Ngabad). _Calamodyta annae_ Gray, Hand-list Birds, 1, 1869, p. 208 (Pelew). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Ngabad. _Characters._--Adult: A medium-sized warbler with a rather long bill and tail; upper parts near "buff olive," slightly lighter on head; lores olive-gray to olive-green; supraloral stripe and orbital ring pale yellow-buff; auriculars yellow-brown; underparts lighter and more olive-yellow than back, especially in midsection; chin paler; sides, tibia and under tail-coverts darker and more olivaceus; wings and tail dark brown with outer edges olive; under wing-coverts light yellow; axillaries more whitish; upper mandible horn-colored, darker at base; lower mandible yellowish, darker at base; legs and feet light yellowish-brown; iris grayish-brown. Adult female resembles adult male but is slightly smaller. Immature: Resembles adult but forehead and crown slightly lighter and more yellowish; back and rump more brownish. _Measurements._--Measurements are listed in table 36. TABLE 36. MEASUREMENTS OF _Psamathia annae_ ===============+=====+=========+=========+=============+============= | | | | Exposed | SEX | No. | Wing | Tail | culmen | Tarsus ---------------+-----+---------+---------+-------------+------------- Adult males | 7 | 74 | 64 | 21.0 | 28.5 | | (72-77) | (62-68) | (19.5-22.5) | (27.0-30.0) | | | | | Adult females | 11 | 69 | 58 | 21.0 | 26.5 | | (65-74) | (55-61) | (19.5-22.0) | (25.0-29.0) ---------------+-----+---------+---------+-------------+------------- _Specimens examined._--Total number, 23 (9 males, 14 females), as follows: Palau Islands, USNM--Koror, 5 (Nov. 7, 9, 11, 18, 19)--Peleliu, 4 (Aug. 29, 30, Sept. 4, Dec. 5)--Ngabad, 1 (Sept. 11); AMNH--exact locality not given, 13 (Nov., Dec.). _Nesting._--Nehrkorn (1879:399, 404) records the egg of _Psamathia_ from Palau. The NAMRU2 party obtained no evidence of nesting of this bird in August and September, 1945. In 1931, Coultas secured birds in November and December, which had enlarged gonads. Marshall (1949:219) records breeding in November and December. _Molt._--Most of the skins taken from August to December have worn or molting feathers. Apparently there is a high point in the molting process in autumn and early winter. _Food habits._--Stomachs obtained from birds taken by the NAMRU2 party in August and September contained parts of insects and small seeds. One stomach contained about one-half cc. of parts of insects. Coultas (field notes) found the bird scratching "on the ground for seeds as well as working in the low trees and bushes." Marshall (1949:212) records insects and snails as food items. _Remarks._--_Psamathia_ has the habit of a typical bushwarbler, occurring in jungle undergrowth and along woodland margins. In 1945, specimens were obtained by the NAMRU2 party in the scrub vegetation which was growing over the devastated battle areas of Peleliu. The bird was not common in this habitat, nor was it very numerous on the smaller offshore islands. Coultas (field notes) found the bird to be rather tame and frequently to live close to human habitation. Its call, as noted by Coultas, is a loud whistle that breaks off into a beautiful song. The bird is quick in its movements; one seen by the writer at Ngabad was constantly moving about in low, second-growth vegetation and was making a low, whistling call. The resemblance of _Psamathia_ to _Rukia palauensis_ is noteworthy. These two unrelated birds live together in jungle areas, although _Psamathia_ is perhaps confined more to the forested undergrowth and is more solitary in its habits. Aside from its longer legs and bill, _Psamathia_ closely resembles _Rukia_ in shape and coloration. They appear to have developed along somewhat similar evolutionary lines with regard to structure, color and ecologic requirements. The Palau Warbler was first discovered by Captain Tetens and described as belonging to a new genus by Hartlaub and Finsch (1868a:5). In the original description the authors remark that, "The generic position of this new form is in the _Calamoherpe_ group; the feet are the same as in _Calamoherpe_; but the beak is weaker and slenderer, and the wings are very different. _Calamoherpe_ has the first quill quite spurious, the third is the longest, and the second and sixth are subequal. In _Calamoherpe_ there are twelve tail-feathers; in _Psamathia_ I can find only ten. _Tatare_ is a very different form, with a scutellated tarsi, a very different structure of the plumage, a much more elongated beak, and a twelve-feathered tail. _Tatare syrinx_ is a typical Calamoherpe. In the structure of the wing of _Psamathia_, there seems to be a great resemblance to the genus _Arundinax_ of Blyth, a form with which it is not in my power to compare." The genera _Calamoherpe_ and _Tatare_ are now included in _Acrocephalus_; the describers were comparing the Palau Warbler with the reed-warblers of Micronesia and Polynesia. Sharpe (1883:93) writes that the Palau Bush-warblers are "Aberrant reed warblers, and should, in my opinion, be placed in future classifications of the Cichlomorphae near the genera _Cettia_ and _Acrocephalus_, from which they are separated by their larger first primary only. Through _Megalurus_ and _Sphenoeacus_ they approach the grass-warblers and Cisticolae especially." Mayr (1941b:203) cites _Psamathia_ as an example of "restricted endemism" and points out that the nearest relative occurs in the Philippines. Delacour (1942:514), in a discussion of the bush-warblers of the genera _Cettia_, _Bradypterus_ and related forms, says, "_Psamathia annae_, from Palau Islands, is related to _Cettia_, differing mainly in its much longer bill and legs." _Psamathia_ is a specialized bush-warbler and has followed a pattern of evolution which characterizes some of the other island birds in that the bill and legs are long and the wing is rather short and rounded. _Psamathia_ resembles many of the bush-warblers, as well as the reed-warblers {_Acrocephalus_); in general, body coloring being paler below and darker above. It differs from _Acrocephalus_ by having a longer tenth primary, smaller second and third primaries, only ten tail feathers, a more rounded wing, differently shaped nostrils, and by much softer plumage (the latter character is found also in _Collurcincla tenebrosus_ and _Cleptornis marchei_ of Micronesia). Rather than being related to the reed-warblers, as was supposed by Hartlaub and Finsch, _Psamathia_ seems closest to _Cettia_, especially to _Cettia_ (_Horeites_) _diphone seebohmi_ of the Philippine Islands. _Psamathia_ has a longer bill than this bird, but the general appearance and structure of the feet, tail, wing, body and bill are the same. =Acrocephalus luscinia luscinia= (Quoy and Gaimard) Nightingale Reed-warbler _Thryothorus luscinius_ Quoy and Gaimard, Voy. "l'Astrolabe," Zool., 1, 1830, p. 202, pl. 5, fig. 2. (Type locality, Marian Is. = Guam.) _Sylvia syrinx_ Kittlitz (part), Obser. Zool., in Lutké, Voy. "Le Seniavine," 3, 1836, p. 306 (Guahan); _idem_ (part), Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 141 (Guaham). _Tatare luscinia_ Gray, Genera Birds, 3, 1849, App. 8 (Marian Is. = Guam); Hartlaub, Journ. f. Ornith., 1854, p. 167 (Mariannen = Guam); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 14 (Ladrone or Marian Is. = Guam); Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 31 (Guaham); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 41 (Guam); Büttikofer, Notes Leyden Mus., 14, 1892, p. 16 (Guam); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 209 (Guam). _Tatare luscinius_ Bonaparte, Consp. Avium, 1, 1850, p. 224 (Guam); _idem_, Comptes Rendus Acad. Sci. Paris, 41, 1855, p. 1111 (Mariannes = Guam); Gray, Hand-list Birds, 1, 1869, p. 194 (Ladrone = Guam). _Hybristes_ [_luscinia_] Reichenbach, Syst. Avium, 1850, pl. 57, fig. 7 (no locality = Guam). _Acrocephalus orientalis_ Pelzeln, Reise, "Novara," Vögel, 1865, p. 64 (Guaham). _Tatares luscinius_ Giebel, Thes. Ornith., 3, 1877, p. 599 (Marianae). _Acrocephalus mariannae_ Tristram, Ibis, 1883, p. 45 (Type locality, Guam). _Tatare mariannae_ Sharpe, Cat. Birds British Mus., 7, 1883, p. 528 (Marianne = Guam); Oustalet, Le Nat., 1889, p. 260 (Mariannes = Guam). _Acrocephalus luscinia_ Hartert, Novit. Zool., 5, 1898, p. 57 (Guam, Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 53 (Guam, Saipan); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Guam, Saipan); Safford, Osprey, 1902, p. 69 (Guam); Dubois, Syn. Avium, 1, 1902, p. 369 (Marianne); Safford, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 264 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, pp. 30, 79 (Guam); Reichenow, Die Vögel, 2, 1914, p. 545 (Marianen); Cox, Island of Guam, 1917, p. 21 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 67 (Guam, Saipan); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 25 (Guam); Thompson, Guam and its people, 1942, p. 23 (Guam); Strophlet, Auk, 1946, p. 539 (Guam). _Conopoderas luscinia_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 594 (Marianas); Hand-list Japanese Birds, rev., 1932, p. 177 (Marianas). _Conopoderas luscinia hivae_ Yamashina, Bull. Biogeogr. Soc. Japan, 12, 1942, p. 81 (Type locality, Saipan); Hand-list Japanese Birds, 3d ed., 1942, p. 196 (Almagan, Saipan). _Conopoderas luscinia luscinia_ Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Guam). _Acrocephalus luscinia luscinia_ Mayr (part), Birds Southwest Pacific, 1945, p. 294 (Guam, Saipan, Almagan); Stott, Auk, 1947, p. 526 (Saipan); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 67 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam, Saipan, Almagan. _Character._--Adult: A rather large warbler with long, curved bill; upper parts near "Saccardo olive"; feathers of head grayer because of darker shafts; rump paler and browner; lores dark; supraloral stripe light buffy-yellow; auriculars, cheeks, and sides of neck slightly darker; chin, throat, breast, and abdomen pale buffy-yellow; tibia darker and more olivaceous-brown; under tail-coverts pale yellow-buff; wing and tail feathers brown, edged with ochraceous; under wing grayish, inner edges lighter; axillaries pinkish-white; upper mandible dark horn colored; lower mandible lighter yellow; feet light gray; iris brown. Female resembles male but is slightly smaller. TABLE 37. MEASUREMENTS OF _Acrocephalus luscinia_ -----------------+----+--------+-------+-------+-----------+----------- | | | | |Exposed | SUBSPECIES | No.| Sex | Wing | Tail |culmen | Tarsus -----------------+----+--------+-------+-------+-----------+----------- | | | | | | _A. l. luscinia_ | 11 | males | 84 | 83 | 36.0 | 30.5 | | |(81-86)|(80-86)|(35.5-39.0)|(30.0-31.0) | 1 | female | 78 | 73 | 37.0 | 28.5 | | | | | | _A. l. syrinx_ | 31 | males | 78 | 71 | 26.5 | 26.5 | | |(76-80)|(68-75)|(25.0-27.0)|(25.0-29.0) | 12 | females| 75 | 68 | 25.5 | 26.0 | | |(74-78)|(65-70)|(24.0-27.0)|(24.0-26.0) -----------------+----+--------+-------+-------+-----------+----------- Immature: Resembles adult, but upper parts duller and more brown and less olive; underparts less yellow; wing and tail feathers lighter brown. _Measurements._--Measurements are listed in table 37. _Weights._--The weights of three adult males obtained at Guam by the NAMRU2 party are 30, 30, and 31 grams. An adult female from Guam weighed 27 grams. _Specimens examined._--Total number, 12 (11 males, 1 female), as follows: Mariana Islands, USNM--Guam, 6 (June 2, 13, July 2, 18)--Saipan, 6 (Sept. 27, 30). _Nesting._--Oustalet (1895:209) writes that Marche found nests at Guam in June, 1887. The NAMRU2 party obtained two males with enlarged gonads in June, 1945. _Molt._--Specimens taken in June, July, and September are either in worn plumage or in molt. Birds in worn plumage become a faded straw-brown above. Oustalet apparently interpreted this coloring of the worn plumage as a seasonal coloration. _Food habits._--Seale (1901:53) reports that four stomachs which he examined contained insects and larvae. Marshall (1949:21) lists as food items: lizards, snails, spiders, and insects. _Remarks._--The Nightingale Reed-warbler at Guam is restricted to cane thickets and adjacent areas in and near fresh and brackish water marshes. In 1945, the NAMRU2 party found the bird fairly numerous in some of these habitats. Seale (1901:53) writes, "This bird is now quite scarce on the island of Guam. It lives exclusively among the reedy swamps, and those swamps are now being drained to make room for the Chinaman's rice paddies." Mayr (1945a:295) also notes the rarity of the species. As a result of the late war, the cultivation of rice was reduced and the reed-warbler probably has been able to increase in some of the now fallow areas. The most extensive range of this bird at Guam is found in the Agaña Swamp, where there is a large area consisting of thick cane. Here, and in the other large cane patches, the chief hazard to the bird population appears to be fire. In dry periods, the entire habitat might be easily destroyed by fire. The birds are extremely shy; their melodious songs may be heard in the reeds, but their active movements in the thick cane are difficult to observe. While hunting for these birds along the edges of Agaña Swamp on June 2, the writer observed, or located the calls of, at least six or seven individuals but could only get within shooting range of three birds. Within the cane thickets, these birds feed and move about near the ground or the surface of the water. Rarely do they perch in a conspicuous manner in the upper parts of the cover. Their color patterns blend perfectly with the coloration of the dry cane stalks. Perhaps failure to find many of the birds because of their secretive habits has caused many observers to assume that the bird is near extinction. Nevertheless, it is my contention that the bird, being restricted to these limited areas, has never been very abundant at Guam. The absence of natural enemies, especially snakes, may be one of the principal reasons why they have been able to survive. Reed-warblers were not found by the NAMRU2 party at Rota in 1945, nor have they been reported from Tinian. Yamashina in 1942 described the populations at Saipan and Almagan as distinct. I have not seen this description, but on the basis of examinations of specimens from Saipan, I can see no recognizable differences between these and birds from Guam. =Acrocophalus luscinia syrinx= (Kittlitz) Nightingale Reed-warbler _Sylvia syrinx_ Kittlitz, Mém. Acad. Imp. Sci. St. Petersbourg, 2, 1835, p. 6, pl. 8. (Type locality, Lugunor and Ulcei = Woleai.) _Sylvia syrinx_ Kittlitz (part), Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 297 (Lougounor); _idem_, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 92 (Ualan, Lugunor, Ulea). _Eparnetes_ Reichenbach, Syst. Avium, 1850, pl. 57 (no locality = Carolines); Bonaparte, Comptes Rendus Acad. Sci. Paris, 41, 1855, p. 1111 (Carolines). _Tatare syrinx_ Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 131 (Ualan, Lugunor); Pucheran, Voy. Pôle Sud, 3, 1853, p. 92 (Hogoleu = Truk); Hartlaub, Journ. f. Ornith., 1854, pp. 164, 168 (Hogoleu); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 14 (Ualan); Sharpe, Cat. Birds British Mus., 7, 1883, p. 527 (Carolines); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 41 (Ruk, Ualan, Luganor, Uleei, Nukuor, Ponapé); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 210 (Ruk, Ponapi, Mortlock, Kusaie, Uleei, Nukuor). _Acrocephalus orientalis_ Pelzeln, Reise "Novara," Vögel, 1865, pp. 63, 162 (Puynipet, Lugunor, Ulcei). _Calamodyta syrinx_ Gray, Hand-list Birds, 1, 1869, p. 208 (Ualan); Giebel, Thes. Ornith., 1, 1872, p. 529 (Carolin.). _Calamoherpe syrinx_ Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 17 (Ponapé, Lugunor, Ruck, Ualan, Uleei); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); _idem_, Journ. f. Ornith, 1880, pp. 287, 297 (Ponapé, Ruck, Mortlocks, Kuschai); _idem_, Proc. Zool. Soc. London, 1880, p. 575 (Ruk, Ponapé); _idem_, Ibis, 1881, pp. 108, 112, 115, 247 (Kuschai, Ruck, Ponapé, Mortlocks); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 298, 330, 353 (Ponapé, Mortlocks, Nukor, Ruk); Finsch, Ibis, 1883, p. 143 (Ruck); _idem_, Mitth. Ornith. Ver. Wien, 1884, p. 49 (Ponapé); _idem_, Sammlung wissensch. Vorträge, 14 ser., 1900, p. 659 (Carolinen). _Acrocephalus syrinx_ Seebohm, Cat. Birds British Mus., 5, 1881, p. 100 (Ponapé); Tristram, Ibis, 1883, p. 44 (Ponapé, Ruk, Mortlock, Lugunor, Uleei); _idem_, Cat. Birds, 1889, p. 152 (Ponape, Ruk); Nehrkorn, Kat. Eiers., 1899, p. 33 (Ponapé, Ruk); Hartert (part), Novit. Zool., 5, 1898, p. 58 (Carolines); _idem_, Novit. Zool., 7, 1900, p. 3 (Ruk); Seale (part), Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 53 (Ponapé); Matschie, Journ. f. Ornith., 1900, pp. 112, 113 (Ruk, Ponapé, Ualan); Dubois, Syn. Avium, 1, 1902, p. 369 (Ponapé); Reichenow, Die Vögel, 2, 1914, p. 545 (Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Ponapé, Ruk); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). _Conopoderas syrinx_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 214 (Ponapé, Truk); Takatsukasa and Yamashina, Dobotsu. Zasshi, 43, 1931, p. 485 (Caroline Is.); Yamashina, Tori, 7, 1932, p. 405 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 177 (Carolines). _Acrocephalus stentoreus syrinx_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 67 (Ruk, Ualan, Lugunor, Wolea, Nukuoro, Ponapé). _Conopoderas luscinia syrinx_, Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Wolea, Lamotrek, Truk, Lukunor, Nukuoro, Ponapé, Kusaie). _Acrocephalus luscinia syrinx_ Mayr, Birds Southwest Pacific, 1945, p. 294 (Carolines); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 67 (Truk). _Geographic range._--Micronesia: Caroline Islands--Woleai, Lamotrek, Truk, Lukunor, Nukuoro, Ponapé, Kusaie. _Characters._--Adult: Resembles _A. l. luscinia_, but smaller; with shorter, straighter bill; head and neck more reddish-brown; back, rump, wing, and tail edged with cinnamon; flight feathers faintly tipped with white. Immature: Resembles adult, but lighter and more rufous in color; wings and rump paler, wings edged with rufous buff. _Measurements._--Measurements are listed in table 37. _Specimens examined._--Total number, 62 (35 males, 20 females, 7 unsexed), as follows: Caroline Islands, USNM--Ponapé, 1 (Feb. 12)--Truk, 4 (Feb. 16, Mar. 15); AMNH--Ponapé, 35 (Nov., Dec.)--Truk, 22 (Feb., March, May, June, Nov.). _Nesting._--Birds nest in reedy swamps and scrub vegetation in the Caroline Islands, although Finsch (1881b:115), recording a field note by Kubary, states that nests were found in trees at Mortlock Atoll (= Lukunor). Yamashina (1932a:405) reports the collecting of seven sets of eggs at Ponapé in July and August, 1931. The sets consisted of one or two eggs each. McElroy of the NAMRU2 party obtained specimens with enlarged gonads at Truk in December and noted that birds were carrying nest materials to cane swamps. Of the birds secured by Coultas in November and December at Ponapé, only a small number had enlarged gonads. He also found nests containing no eggs in low bushes at Ponapé. Hartert (1900:3) reports that at Truk Owston's Japanese collectors obtained "many nests" from the end of May to the beginning of July. These nests contained one or two eggs and were found 7 to 20 feet above the ground in breadfruit, coconut and ivory-nut palm trees. Hartert writes, "The eggs are white, covered with darker and lighter brown patches, and underlying ashy grey or lavender-grey spots. These spots are generally thicker near the broad end, sometimes forming a loose ring, and they are sometimes equally spread over the whole surface." He lists measurements of 48 eggs. _Molt._--Of the specimens examined by me, those taken in the spring and summer are in fresh or worn plumage; those taken in fall and winter are in molt, with a few skins exhibiting worn or fresh plumage in the latter period. Apparently the peak in the molting process occurs from September to December. _Food habits._--The reed-warbler is an insect feeder. Coultas, in his observations of the bird at Ponapé, relates that he was able to locate the warbler by listening for the "snapping of the mandibles as the bird is catching food." _Remarks._--From the observations of Kittlitz, Kubary, Coultas, McElroy, and others, it is apparent that the Nightingale Reed-warbler in the Caroline Islands is restricted to the lower elevations of the islands. Whereas the reed-warbler at Guam seems closely associated with cane swamps and adjacent vegetation, the bird in the Carolines may range more extensively into brush lands, forest margins and grass lands. Coultas (field notes) notes that the reed-warbler at Ponapé is a "common bird of the small bush and grasslands. One is attracted by its warbler-like song. The bird spends hours perched on a stem of a bush caroling the time of day. When feeding, one finds it on the ground or working away quietly among the bushes. _Acrocephalus_ is a friendly bird who does not become frightened easily. He responds to man-made calls." The Nightingale Reed-warbler is found on many of the islands in the Caroline Chain, including both the "high" volcanic islands (Ponapé and Truk) and the "low" coral islands (Lukunor and Nukunor). Although the bird has been recorded at Kusaie by Kittlitz and Finsch, it was not taken there by Coultas in 1931. Reed-warblers are unknown at Yap, Ulithi, Fais or at other islands of the extreme western Carolines, or in the Palau Archipelago. They are unrecorded also in the Marshall Islands, but at Nauru in the Gilbert Islands, to the southeast, an isolated population of this bird occurs and has been named _A. l. rehsei_ (Finsch). =Acrocephalus luscinia yamashinae= (Takatsukasa) Nightingale Reed-warbler _Conopoderas yamashinae_ Takatsukasa, Dobutsu. Zasshi, 43, 1931, p. 485. (Type locality, Pagan.) _Tatare syrinx_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 210 (Pagan). _Acrocephalus syrinx_ Hartert (part), Novit. Zool., 5, 1898, p. 58 (Pagan); Seale (part), Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 53 (Pagan). _Acrocephalus stentoreus syrinx_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 67 (Pagan). _Conopoderas yamashinae_, Hand-list Japanese Birds, rev., 1932, p. 177 (Pagan). _Conopoderas luscinia yamashinae_ Hand-list Japanese Birds, 3d ed., 1942, p. 196 (Pagan). _Acrocephalus luscinia yamashinae_ Mayr, Birds Southwest Pacific, 1945, p. 294 (Pagan). _Geographic range._--Micronesia: Mariana Islands--Pagan. _Characters._--Resembles _A. l. syrinx_, but duller and more brownish and less olive-rufous on back, rump and tail; bill shorter and more curved. Takatsukasa (1931:485) gives the following description: "Upperparts dark olive brown, paler on the lower rump; remiges and rectrices dark olive-brown, margined with brown. Superciliary stripe distinct and buff; chin, throat, breast and abdomen pale brown; ear-coverts, sides of neck, sides of breast and flanks dusty greyish brown, belly and under tail-coverts pale buff. Bill clove brown, legs grey, and iris Van Dyke brown." He continues, "It differs from _Conopoderas syrinx_ of Caroline Islands by its colouration and the shape of the bill, namely in the new form the culmen is more curved and more stout, and the tail is less roundish and nearly square." _Measurements._--Takatsukasa and Yamashina (1931b:485) lists the following measurements: 13 adult males--wing, 75-80; tail, 65-70; culmen, 20-22; 6 adult females--wing, 73-77; tail, 60-65; culmen, 20-22. Mayr examined seven specimens from Pagan in the Paris Museum. His measurements are: five males--wing, 76-79; tail, 66-69; bill from nostril, 14-14.5; two females--wing, 75, 77; tail, 66, 67; bill from nostril, 14.5, 15. _Remarks._--No specimens have been examined by me. Oustalet (1895:210) was the first to note the difference between the reed-warblers from Pagan and those from Guam and Saipan (_A. l. luscinia_). He regarded those from Pagan as similar to the population in the Carolines, calling them _Tatare syrinx_. Hartert, Seale, and Momiyama followed Oustalet in this regard, and it was not until 1931 that the population at Pagan was recognized as distinct, when further collections were made by the Japanese. =Acrocephalus luscinia nijoi= (Yamashina) Nightingale Reed-warbler _Conopoderas luscinia nijoi_ Yamashina, Tori, 10, 1940, p. 674. (Type locality, Agiguan.) _Conopoderas luscinia nijoi_ Hand-list Japanese Birds, 3d ed., 1942, p. 196 (Agiguan). _Acrocephalus luscinia luscinia_ Mayr (part), Birds Southwest Pacific, 1945, p. 294 (Agiguan). _Geographic range._--Micronesia: Mariana Islands--Agiguan. _Characters._--Adult: Resembles _A. l. luscinia_, but with shorter bill. Yamashina (1940:674) describes the birds as, "upper parts much less rusty in colour and the flanks and bellies are darker and more brownish than those of the specimens from Almagan and Saipan." _Measurements._--Yamashina (1940:674) gives the measurements of five adult birds from Agiguan as: exposed culmen 27-29, bill from nostril 17.0-20.0; as compared with 27 adult birds from Almagan and Saipan as: exposed culmen 30-34, bill from nostril 21.2-24.5. _Remarks._--No specimens have been examined by me. The island of Agiguan is a very small one lying offshore from Tinian and not far from Saipan, where _A. l. luscinia_ occurs. _A. l. nijoi_ is given tentative recognition, on the basis of the measurements of the five adult specimens given by Yamashina. These indicate that the population has a distinctly shorter bill. _Evolutionary history of Acrocephalus luscinia._--The species of _Acrocephalus_ in Micronesia and Polynesia have received several taxonomic treatments. In regard to the Micronesian forms, Quoy and Gaimard called the population at Guam _Thryothorus_ while Kittlitz called the population in the Carolines, _Sylvia_. Evidently to emphasize the distinctness of these two birds, Reichenbach in 1850 renamed the bird in the Marianas as _Hybristes_ and the bird in the Carolines as _Eparnetes_. The birds were later placed in the genus, _Tatare_, by Hartlaub, Gray, Sharpe and other workers. Gray also used the name, _Calamodyta_, for the bird in the Carolines. The generic term, _Calamoherpe_, was employed also by a number of workers for the Caroline population. Sharpe (1883:525) placed the reed-warblers in the family Timelidae and retained the name, _Tatare_, for the Micronesian and Polynesian forms. In distinguishing _Acrocephalus_ from _Tatare_ he has the following to say of _Acrocephalus_: "besides having a much shorter bill, possesses a very much more pointed wing, the distance between the primaries and the secondaries being much more than the length of the hind toe and claw; whereas in _Tatare_ the wing is much more obtuse, and the distance between the primaries and the secondaries is less than the length of the hind toe and claw." More recent authors have followed Sharpe using the generic name, _Conopoderas_ (= _Tatare_, old name preoccupied). However, Tristram (1883:38-46) regarded the separation of these oceanic forms from _Acrocephalus_ as a taxonomic error. He said that this is "one of the very few links (the others being the solitary _Hirundo tahitica_ and the Merulae) between the avifauna of Oceania and our own; and it has a much wider range east and west than either of the other links, extending from the Carolines in the east to the Marquesas in the west." Mayr has pointed out (orally to the writer) that the separation of the Oceanic reed-warblers from _Acrocephalus_ is an unnatural one, although it is perfectly true that the extreme members (_A. caffra_ and _A. l. luscinia_) have a very long bill, but forms with shorter bills like _A. l. syrinx_ point to the close affinity between the continental species and these insular birds. This has also been noted by Hartert (1898:58). Mayr (_in litt._) comments that "There is no difference between _Acrocephalus_ and _Conopoderas_ in regard to the wing formula, provided that we compare the Polynesian species with the tropical forms of _Acrocephalus_ (such as _toxopei_ and _cervinus_). The character mentioned by Sharpe is very artificial and merely indicates the difference in the wing between a migrant of the temperate zone and a resident of the tropics. There is no denying that some of the warblers of eastern Polynesia are no longer reed-warblers but have become dwellers of trees and bushes. However, this same tendency prevails among some of the unquestionable species of _Acrocephalus_ (_scirpaceus_ and _palustris_) and at any rate a slight change in habits is not sufficient for generic separation." Earlier, Mayr (1942b:169) used _Conopoderas_ as one of the several genera that is based on "morphologically distinct geographic forms." The degree of modification that has occurred in these oceanic reed-warblers, would, if the birds were in a continental area, undoubtedly be considered worthy of specific or even generic rank by some authors; however, as Mayr (1942b:162) points out, "the majority of well-isolated subspecies have all the characters of good species and are indeed considered to be such by the more conservative systematists." Owing to their differentiation, the Micronesian and Polynesian reed-warblers might not be considered by some ornithologists as belonging to a single superspecies; however, all evidence seems to point to the origin of this group by a single invasion from Asia." Tristram (1883:41) was the first worker to recognize the relationship of the Micronesian and Polynesian reed-warblers to the continental forms, when he placed them within the genus _Acrocephalus_. Rothschild (1893:2) further stated, "_Tatare_ cannot be separated generically from _Acrocephalus_." In discussing the status of the Hawaiian species, _A. familiaris_, Hartert (1898:58) also follows this treatment. Bryan (1941:187) also comments on the relationship of the "miller" birds of Laysan and Nihoa to species at Guam, Christmas and other islands of the Pacific. The reed-warblers of Polynesia and Micronesia represent an ancient invasion from Asia. The continental form, _Acrocephalus arundinaceous_, is apparently closest to the ancestral stock of these oceanic birds. This species resembles the oceanic populations in size, general coloring, shape of bill, and wing and tail structure. Some of the continental races of this species have a shorter first primary which is similar to that in the oceanic forms. How rapid the spread was of the reed warbler through the large insular area that it now occupies is unknown. _A. syrinx_ of Micronesia has a shortened wing and some populations have a long bill. Species in Polynesia have stronger wings than the one in Micronesia, but have become differentiated in other ways, as, for example, by the long bill of _A. caffra_ and the small size of _A. aequinoctialis_. In addition, call notes have become varied, as noted by Chapin (in Mayr, 1942b:54). Also certain of the reed-warblers have become bush and tree-living birds. The Hawaiian birds are reduced in size and have become tree-living in a manner similar to that of other Polynesian species. These modifications of the reed-warblers of the Oceanic area appear, according to Murphy and Mathews (1929), to indicate their long-time residence in the islands, as compared with subspecies of _A. arundinaceous_ that are found in Melanesia. The latter birds, which are not ancestral to the Polynesian birds, resemble closely their Asiatic ancestors and have also retained their swamp-living habits. This would seem to indicate that the birds in Melanesia may be of more recent occurrence. Stresemann (1939b:324) presents a map of the distribution of _A. arundinaceous_ in southeastern Asia and adjacent islands. The original stock came from a point in China, north of Indochina, spreading to the Philippines and to Celebes, from where it reached the Solomons and New Guinea via the Lesser Sundas and Australia. [Illustration: FIG. 15. Geographic distribution of _Acrocephalus_ in the Pacific area and routes of its dispersal. (1) _A. arundinaceus_; (2) _A. luscinia_; (3) ranges of _A. atypha_, _A. caffra_, and _A. vaughani_; (4) _A. aequinoctialis_; (5) _A. familiaris_.] The path of invasion of Oceania by the reed-warbler is pictured in figure 15. Probably the birds became established in Micronesia by an invasion from the Bonins, where _A. arundinaceus orientalis_ is known to occur today. From the Marianas and Carolines, the birds spread to Polynesia; _A. l. rehsei_ of the Gilbert Islands (Nauru) might well be a connecting link. Possibly, the Hawaiian birds came as a separate invasion _via_ the Volcano and Bonin islands or through the Micronesia Chain, or through the Line and Christmas islands from the south. It seems evident, however, that owing to their geographic proximity and comparative structural similarity, the species in Hawaii is closest to _A. luscinia_ of Micronesia. The absence of reed-warblers from the western Carolines and Palaus seems to reduce the possibility of an invasion from the Philippine region. However, reed-warblers are absent from the Marshall and the northern Gilbert islands, where there is undoubtedly suitable habitat for their occurrence. Possibly these islands were once occupied by the birds but they were eliminated by natural causes or by man and his land uses. =Rhipidura rufifrons uraniae= Oustalet Rufous-fronted Fantail _Rhipidura Uraniae_ Oustalet, Bull. Soc. Philom. Paris, (7), 5, 1881, p. 76. (Type locality, Mariannes = Guam.) _Rhipidura pectoralis_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 17 (Ladrone or Marian Is. = Guam). _Rhipidura uraniae_ Reichenow and Schlow, Journ. f. Ornith., 1884, p. 398 (Mariannes = Guam); Hartert, Novit. Zool., 5, 1898, p. 53 (Guam); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 20 (Marianne = Guam); Büttikofer, Notes Leyden Mus., 15, 1893, p. 76 (Guam); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 48 (Guam); Safford, Osprey, 1902, p. 69 (Guam); Dubois, Syn. Avium, 1, 1902, p. 277 (Guam); Safford, The Plant World, 7, 1904, p. 263 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Mearns, Proc. U. S. Nat. Mus., 36, 1909, p. 477 (Guam); Schnee, Zeitschr. f. Naturwisch., 82, 1910, p. 464 (Marianen = Guam); Reichenow, Die Vögel, 2, 1914, p. 267 (Marianen = Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 65 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 25 (Guam). _Rhipidura atrigularis_ Reichenow, Journ. f. Ornith., 1885, p. 110 (Type locality, Palau, error = Guam); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 21 (Pelew, error = Guam); Takatsukasa and Kuroda, Tori, 1, 1915, p. 63 (Marianne = Guam). _Rhipidura versicolor_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 190 (Guam). _Rhipidura rufifrons uraniae_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 490 (Marianne = Guam); Hand-list Japanese Birds, rev., 1932, p. 176 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 195 (Guam); Mayr, Birds Southwest Pacific, 1945, p. 295 (Guam); Watson, The Raven, 17, 1946, p. 42 (Guam); Mayr and Moynihan, Amer. Mus. Novit., no. 1321, 1946, pp. 3, 9 (Guam); Baker, Proc. Biol. Soc. Washington, 59, 1946, p. 77 (Guam); _idem_, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 67 (Guam). _Rhipidura rufifrons_ Wharton, Ecol. Monogr., 16, 1948, p. 174 (Guam); Strophlet, Auk, 1946, p. 339 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam. _Characters._--Adult: Forehead and anterior crown near "cinnamon-buff"; lores and orbital ring black, auriculars more brownish than lores; malar stripe white; a few feathers in posterior malar region tipped with "citrine drab"; anterior part of chin white; posterior part of chin, throat, and upper breast black; feathers on breast edged with white; lower breast, abdomen, sides, flanks, tibia, vent, and under tail-coverts near "royal brown," becoming lighter on breast and more rufous on under tail-coverts; sides of neck and back near "Dresden brown," becoming grayer on neck and crown where feathers have darker shafts; rump and upper tail-coverts near "orange rufous"; basal half of tail slightly lighter than rump; terminal part of tail black, tipped with white; wings dark edged with coloring like back; under wing grayish with axillaries tipped with buffy-white; bill black with base of upper mandible lighter; feet dark brown; iris dark brown. Immature: Resembles adult, but head, neck, scapulars, and secondaries edged with rufous; feathers of chin and throat edged with whitish. Younger birds may have less rufous on head but feathers of body more rufous with creamy edges. _Measurements._--Measurements are listed in table 38. TABLE 38. MEASUREMENTS OF _Rhipidura rufifrons_ IN MICRONESIA ===================+============+=======+=======+===========+=========== | Number | | | Exposed | SUBSPECIES | and sex | Wing | Tail | culmen | Tarsus -------------------+------------+-------+-------+-----------+----------- _R. r. uraniae_ | 11 males | 66 | 78 | 13.6 | 16.6 | |(64-69)|(75-82)|(13.1-14.5)|(15.6-17.2) | | | | | | 6 females | 65 | 76 | 12.3 | 16.8 | |(61-68)|(73-81)|(11.6-12.5)|(16.1-17.6) | | | | | _R. r. saipanensis_| 7 males | 68 | 81 | 13.3 | 17.3 | |(68-69)|(80-83)|(13.0-13.5)|(16.2-18.4) | | | | | | 6 females | 64 | 76 | 12.7 | 17.9 | |(62-66)|(72-81)|(12.4-13.4)|(17.2-18.1) | | | | | _R. r. mariae_ | 2 males | 65, 67| 82, 82| 12.1, 12.4|17.1, 17.2 | | | | | _R. r. kubaryi_ | 14 males | 77 | 88 | 14.4 | 20.0 | |(75-79)|(82-95)|(13.6-15.0)|(19.0-21.0) | | | | | | 10 females | 72 | 87 | 14.5 | 20.0 | |(69-75)|(83-90)|(14.0-15.0)|(20.0-20.5) -------------------+------------+-------+-------+-----------+----------- _Weights._--The NAMRU2 party recorded the weights of nine males as 9.0-10.0 (9.0); of three females as 7.2-9.6 (8.8) grams. _Specimens examined._--Total number, 41 (19 males, 14 females, 8 unsexed), as follows: Mariana Islands, USNM--Guam, 17 (May 29, 30, June 6, 14, 18, July 12, 20); AMNH--Guam, 24 (Jan., Feb., March, Aug., Sept., Dec.). _Nesting._--Hartert (1898:54) recorded nests taken at Guam in February and March. _Molt._--On the basis of specimens examined, it is apparent that molt begins in August or September and continues through the months of the fall. _Parasites._--Wharton (1946:174) obtained the chigger (Acarina), _Trombicula_ sp., from this bird at Guam. _Remarks._--The Rufous-fronted Fantail at Guam is a bird of the forest and forest scrub. It prefers the areas where leafy undergrowth is present. It moves rapidly about continually fluttering its wings and spreading its long fanlike tail. The birds are usually observed in pairs. On January 21, 1945, E. W. Coleman of the NAMRU2 party killed a fantail but before he could retrieve it, a large toad (_Bufo marinus_) seized the fallen bird and carried it into a hole in the ground. =Rhipidura rufifrons saipanensis= Hartert Rufous-fronted Fantail _Rhipidura saipanensis_ Hartert, Novit. Zool., 5, 1898, p. 54. (Type locality, Saipan). _Rhipidura versicolor_ Oustalet, Le Nat., 1889, p. 260 (Mariannes = Saipan); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 21 (Marianne = Saipan); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 190 (Saipan). _Rhipidura saipanensis_ Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 48 (Saipan); Dubois, Syn. Avium, 1, 1902, p. 277 (Saipan); Takatsukasa and Kuroda, Tori, 1, 1915, p. 63 (Marianne = Saipan). _Rhipidura rufifrons saipanensis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 65 (Saipan); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 490 (Saipan); Hand-list Japanese Birds (part), rev., 1932, p. 176 (Saipan, Tinian); Hand-list Japanese Birds (part), 3d ed., 1942, p. 195 (Saipan, Tinian); Mayr (part), Birds Southwest Pacific, 1945, p. 295 (Saipan, Tinian); Mayr and Moynihan (part), Amer. Mus. Novit., no. 1321, 1946, p. 3 (Saipan, Tinian); Baker, Proc. Biol. Soc. Washington, 59, 1946, p. 77 (Saipan, Tinian); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 98 (Tinian). _Rhipidura lepida saipanensis_ Stott, Auk, 64, 1946, p. 527 (Saipan). _Geographic range._--Micronesia: Mariana Islands--Saipan, Tinian. _Characters._--Adult: Resembles adult of _R. r. uraniae_, but forehead and anterior crown more rufous; posterior crown and nape lighter; rump and upper tail-coverts lighter and richer in color; white malar stripe broader; chin with white feathering more extensive, covering edge of upper throat. _Measurements._--Measurements are listed in table 38. _Specimens examined._--Total number, 16 (9 males, 6 females, 1 unsexed), as follows: Mariana Islands, USNM--Saipan, 1 (Dec. 15)--Tinian, 3 (Oct. 16, 23); AMNH--Saipan, 6 (July, Aug.)--Tinian, 6 (Sept.). _Molt._--Molt begins in July and extends through the autumn. Most of the specimens examined, that were taken in this period, are in molt. _Food habits._--Stott (1947:527) writes that the fantail forages for insects in the undergrowth and also while on the wing captures flying insects. Downs (1946:99) made similar observations concerning this bird at Tinian. _Remarks._--In studying the collection of fantails obtained by Marche at Guam and Saipan, Oustalet (1895:191) reached the conclusion that the birds from these two islands were the same as the bird from Yap, which he called _R. versicolor_. He thought that the white-throated birds were in breeding plumage, and that the black-throated birds (from Guam) were in autumn and winter dress. This error was corrected by Hartert (1898:53). Downs (1946:98-100) has published some interesting observations concerning the fantail at Tinian. He describes feeding behavior and the song which he says is "a beautiful rolling whistle, starting rather shrilly, then rolling on. Something like a meadow-lark and song sparrow combined." Gleise (1945:220) estimated the population of fantails at Tinian to be "40-50" in 1945. In 1931, Coultas found the bird at Tinian but not at Saipan. Stott (1947:527) observed the bird at Saipan "in forested areas and vine-draped crevices in the lava above Magicienne Bay." =Rhipidura rufifrons mariae= R. H. Baker Rufous-fronted Fantail _Rhipidura rufifrons mariae_ R. H. Baker, Proc. Biol. Soc. Washington, 59, 1946, p. 7. (Type locality, Rota.) _Rhipidura rufifrons saipanensis_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 222 (Rota); Hand-list Japanese Birds (part), rev., 1932, p. 176 (Rota); Hand-list Japanese Birds (part), 3d ed., 1942, p. 195 (Rota); Mayr (part), Birds Southwest Pacific, 1945, p. 295 (Rota); Mayr and Moynihan (part), Amer. Mus. Novit., no. 1321, 1946, p. 3 (Rota). _Rhipidura rufifrons mariae_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 68 (Rota). _Geographic range._--Micronesia: Mariana Islands--Rota. _Characters._--Adult: Resembles adult of _R. r. saipanensis_, but with richer brown coloring on the breast and abdomen; darker above, especially the forehead, rump, and basal part of tail; chin with small mount of white; malar line of white thinner. _Measurements._--Measurements are listed in table 38. _Weights._--Baker (1946:78) records the weights of two adult males from Rota as 8.3 and 9.0 grams. _Specimens examined._--Total number, 2 males, from Mariana Islands, USNM--Rota (Oct. 22). _Remarks._--Takatsukasa and Yamashina (1932:222) published the first account of the fantail from Rota although Coultas (field notes) obtained a report of its presence at Rota in 1931. The NAMRU2 party obtained the two specimens studied, and reported that the birds were numerous in the forested areas of Rota in 1945. =Rhipidura rufifrons versicolor= Hartlaub and Finsch Rufous-fronted Fantail _Rhipidura versicolor_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 96. (Type locality, Uap.) _Rhipidura versicolor_ Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Sharpe, Cat. Birds British Mus., 4, 1879, p. 320 (Yap); Nehrkorn, Journ. f. Ornith., 1879, p. 402 (Yap); Oustalet, Bull. Soc. Philom. Paris, (7), 5, 1881, p. 76 (Uap); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 21 (Uap); Büttikofer, Notes Leyden Mus., 15, 1893, p. 78 (Uap); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 191 (Yap); Hartert, Novit. Zool., 5, 1898, p. 54 (Yap); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 54 (Yap); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Yap); Dubois, Syn. Avium, 1, 1902, p. 277 (Yap); Reichenow, Die Vögel, 2, 1914, p. 267 (Yap); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Mackenzie = Yap); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 66 (Yap); Hand-list Japanese Birds, rev., 1932, p. 176 (Yap). _Rhipidura rufifrons versicolor_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 489 (Uap); Hand-list Japanese Birds, 3d ed., 1942, p. 196 (Yap); Mayr, Birds Southwest Pacific, 1945, p. 295 (Yap); Mayr and Moynihan, Amer. Mus. Novit., no. 1321, 1946, p. 3 (Yap). _Geographic range._--Micronesia: Caroline Islands--Yap. _Characters._--Adult: Resembles _R. r. uraniae_, but chin and upper throat white; upper parts darker; abdomen whitish. The description of the adult given by Hartlaub and Finsch (1872:96) is "Upper parts a rich brown with a slight reddish tinge; forehead bright rufous; upper and under tail-coverts rufous; throat white, margined underneath by an irregular jugular band of pure black; pectoral plumes black, broadly margined with yellowish white; middle of abdomen whitish, sides of a paler olive-brown under wing-coverts whitish; wing-feathers blackish brown; tail feathers brownish black, all largely tipped with white, the four middle ones rufous at the base, the white terminal spots becoming smaller towards the middle; beak fuscous, the under mandible paler except at tip; feet fuscous." Hartert (1898:54) writes that _R. r. saipanensis_ differs from the bird at Yap "in having the bases of all rectrices rufous, the rump and upper tail-coverts rufous. The sides of the abdomen are not olive-brown, but rufous." _Remarks._--No specimens of the Rufous-fronted Fantail of Yap have been seen by me. On the basis of published descriptions and comments, it appears that the bird is subspecifically distinct from the forms in the Marianas but shows close relationships to them. _R. r. versicolor_ has the chin and throat white; _R. r. saipanensis_ has the chin and part of the throat white and a heavy, white line in the malar region; _R. r. mariae_ has the chin and only a small amount of the throat white and a thinner, white malar stripe; _R. r. uraniae_ has only a small amount of white present on the chin and a very thin, white line in the malar region. =Rhipidura rufifrons kubaryi= Finsch Rufous-fronted Fantail _Rhipidura kubaryi_ Finsch, Proc. Zool. Soc. London, 1875 (1876), p. 644. (Type locality, Ponapé.) _Rhipidura kubaryi_ Finsch, Journ. Mus. Godeffroy, 12. 1876, pp. 17, 29, pl. 2, fig. 2 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 779 (Ponapé); Nehrkorn, Journ. f. Ornith., 1879, p. 403 (Ponapé); Finsch, Journ. f. Ornith., 1880, p. 289 (Ponapé); _idem_, Ibis, 1881, pp. 110, 112, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Tristram, Cat. Birds, 1889, p. 198 (Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 20 (Ponapé); Büttikofer, Notes Leyden Mus., 15, 1893, p. 76 (Ponapé); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Ponapé); Dubois, Syn. Avium, 1, 1902, p. 277 (Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, pp. 54, 64 (Ponapé); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zool., 63, 1919, p. 204 (Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 65 (Ponapé); Yamashina, Tori, 7, 1932, p. 403 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 176 (Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 196 (Ponapé). _Rhipidura kubarii_ Sharpe, Cat. Birds British Mus., 4, 1879, p. 314 (Ponapé); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 55 (Ponapé). _Rhipdura rufifrons kubaryi_ Mayr, Birds Southwest Pacific, 1945, p. 295 (Ponapé); Mayr and Moynihan, Amer. Mus. Novit., no. 1321, 1946, pp. 3, 6, 9, 11, 12, 15, 16 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: Upper parts smoky olivaceous-brown, less smoky on rump and upper tail-coverts; anterior forehead and supraloral region narrowly edged with white; lores and orbital ring black; auriculars brown; feathers of chin and malar region tipped with white; rest of chin and throat black, lower feathers of throat edged with white; abdomen dark olivaceous-brown with whitish mid-portion anteriorily; sides and under tail-coverts ashy, the latter broadly tipped with white; wings and tail dark, tail tipped with white and outer rectrices more broadly so; axillaries and under wing-coverts gray, broadly tipped with white; bill and feet black, mandible basally whitish; iris dark brown. _R. r. kubaryi_ resembles _R. r. uraniae_, but larger; lacking rufous coloring; smaller and shorter, white malar stripe; white on chin reduced. _Measurements._--Measurements are listed in table 38. _Specimens examined._--Total number, 40 (24 males, 15 females, 1 unsexed), as follows: Caroline Islands, USNM--Ponapé, 1 (Feb. 12); AMNH--Ponapé, 39 (Nov., Dec.). _Nesting._--Yamashina (1932a:403) records nests containing one or two eggs taken at Ponapé in 1931 on the following dates: July 11, August 2, 14, 19, 22, 30. Coultas (field notes) obtained reports that the eggs are two in number and laid in a cup-shaped nest of grass and fern, which is placed near the ground. _Molt._--Many of the specimens examined that were taken in November and December are in fresh or slightly worn plumage. Only a few are molting. Apparently molt occurs earlier, perhaps beginning in August and continuing until October or November. _Remarks._--Coultas obtained a large series of these birds at Ponapé in 1931. He writes (field notes) that the fantail is a common bird and is found in forest and brush lands. This bird has a nervous behavior similar to that of other fantails and is constantly "wagging its long tail." Coultas describes it as an aggressive bird, chasing honey-eaters and white-eyes. =Rhipidura lepida= Hartlaub and Finsch Palau Fantail _Rhipidura lepida_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 6. (Type locality, Pelew Islands.) _Rhipidura lepida_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 117, 118 (Pelew Islands); Gray, Hand-list Birds, 1, 1869, p. 331 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 97 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 21, pl. 4, fig. 2-3 (Palau); Sharpe, Cat. Birds British Mus., 4, 1879, p. 322 (Pelew); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Tristram, Cat. Birds, 1889, p. 198 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 21 (Pelew); Büttikofer, Notes Leyden Mus., 15, 1893, p. 81 (Pelew); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 55 (Palau); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Palau); Dubois, Syn. Avium, 1, 1902, p. 278 (Pelew); Reichenow, Die Vögel, 2, 1914, p. 267 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 66 (Pelew); Mathews, Syst. Avium Australasianarum], 2, 1930, p. 484 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 176 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 196 (Babelthuap, Koror, Peliliu); Mayr and Moynihan, Amer. Mus. Novit., no. 1321, 1946, pp. 3, 5, 8, 10, 12, 19 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 68 (Peleliu). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Ngabad. _Characters._--Adult: Upper parts near "cinnamon-rufous," slightly lighter on the upper wing-coverts, scapulars, edges of inner secondaries, and rump; lores blackish; orbital ring and auriculars dark brown; chin, upper throat, and malar region white; lower throat and upper breast black with ashy-gray sides; lower breast whitish; rest of underparts like back but slightly paler; wings dark; tail black with tips rufous, inner rectrices with rufous tips narrower than on tail; under wing-coverts and axillaries broadly edged with rufous; bill blackish, lower mandible whitish at base; feet brownish; iris dark brown. Female slightly smaller. Immature: Resembles adult, but head and neck brown; throat coloring dingy; patch on breast blackish cinnamon. Younger individuals may be more tinged with rufous above and below. _Measurements._--Measurements are listed in table 39. TABLE 39. MEASUREMENTS OF _Rhipidura lepida_ ================+=========+=========+=============+============= Number and Sex | Wing | Tail | Culmen | Tarsus ----------------+---------+---------+-------------+------------- 7 adult males | 80 | 89 | 15.5 | 23.3 | (77-83) | (85-94) | (14.5-16.0) | (23.0-24.0) | | | | 7 adult females | 77 | 86 | 15.5 | 22.5 | (76-79) | (83-88) | (14.5-15.0) | (21.7-23.0) ----------------+---------+---------+-------------+------------- _Specimens examined._--Total number, 18 (9 males, 9 females), as follows: Palau Islands, USNM--Koror, 2 (Nov. 6, 18)--Babelthuap, 1 (Nov. 27)--Peleliu, 4 (Aug. 29, 30, 31); AMNH--exact locality not given, 11 (Nov., Dec.). _Molt._--Some of the birds taken in August are in molt. Specimens taken in November and December are mostly in fresh plumage. Apparently this bird molts in late summer and early fall. _Remarks._--In 1945 the NAMRU2 party found the Palau Fantail in small numbers at Peleliu, Garakayo and Ngabad. At Peleliu the birds were noted as singles or in pairs in brushy undergrowth in forested areas. The birds were observed also in the second growth vegetation in the battle areas. Coultas (field notes) found the bird to be rare and restricted to the true forest, when he visited the Palau Islands in 1931. The fantail is one of the most attractive birds found in the jungles of the Palau Islands. Its bright rufous coloring is conspicuously displayed by the rapid movements of the wings and tail as the bird moves and feeds in the undergrowth. The population is apparently not large, and the individual or pair of birds probably ranges in a relatively large home territory. _Evolutionary History of Rhipidura in Micronesia._--The evolutionary history of _Rhipidura_ in Micronesia has been studied considerably more than that of some of the other genera in the area. Oustalet (1896:70) notes a close relation between _Rhipidura_ of the Marianas and _R. rufifrons_ of Australia. Mayr (1941b:202, 203) regards the genus _Rhipidura_ as typical of the Polynesian area and remarks that speciation within this genus has proceeded at a relatively rapid rate. Mayr and Moynihan (1946) have devoted a 21-page paper to a thorough discussion of the _R. rufifrons_ group, based on the extensive collections at the American Museum of Natural History. They remark that no other genera are closely related to _Rhipidura_ and that evolution has proceeded further in _R. rufifrons_ than in any other species of the genus. These authors regard the Papuan area, probably New Guinea, as the original home of this group. From their study they point out that many of the subspecies of _R. rufifrons_ of the Papuan area, especially those of the Louisiades and the Solomons, appear to be the least specialized of the species, and that this lack of specialization in these subspecies indicates that the ancestral stock of the species _R. rufifrons_ acquired its specificity somewhere in that area. With regard to the kinds of _Rhipidura_ in Micronesia, Mayr and Moynihan (1946:fig. 2) have logically found three separate colonizations within the area: one represented today by _R. lepida_ at Palau; one of subspecies of _R. rufifrons_ at Yap and in the Marianas; and one by _R. r. kubaryi_ at Ponapé. _R. lepida_, according to Mayr and Moynihan (1946), is a result of an early colonization by _Rhipidura_. It is related to _R. dedemi_, _R. superflua_, and _R. teijsmanni_, which are mostly monotypic or have only two or three subspecies within the species. These three species are found in the region including Celebes and the Moluccas. _R. lepida_ apparently invaded the Palau Islands from Celebes or an adjacent area and, among named species, most closely resembles _R. teijsmanni_. Both of these species have a white chin and throat, black breast patch, and rufous abdomen. _R. lepida_ has become differentiated chiefly by the presence of a rufous head and back, a more distinct breast band, and proportionately different amounts of rufous and black coloration of the tail feathers. Mayr and Moynihan (1946:6) give as the chief characters of _R. rufifrons_ the following: "a rufous forehead, a grayish brown head and upper back, a well-defined rufous rump, a white chin and throat, a black breast band with scaling at its lower edge, and a dark brown tail with a distinct rufous base and a white tip." The Micronesian subspecies of _R. rufifrons_ at Yap and in the Marianas display these characters. Of the four subspecies found in the area including Yap and the Marianas, _R. r. versicolor_, _R. r. saipanensis_, _R. r. mariae_ and _R. r. uraniae_, the two first named most closely approach the ancestral stock, which may have been _R. r. commoda_ Hartert of the northern Solomons or some near relative in Melanesia. The amount of white on the chin and throat and on the malar stripe, in _R. r. versicolor_ and _R. r. saipanensis_ is probably nearer that which obtained in the ancestor. At Rota, _R. r. mariae_, exhibits less white on the throat and a thinner, white malar stripe, while at Guam, _R. r. uraniae_ possesses only a small amount of white on the chin and only a very thin line of white in the malar region. This variation in coloration suggests that the birds may have originally become established at Yap, Saipan and Tinian and later, birds from Saipan and Tinian spread to Rota and lastly to Guam. _R. r. kubaryi_ of Ponapé, although considered as a subspecies of _R. rufifrons_ by most workers, has lost the rufous coloring found in most members of the species. Mayr and Moynihan (1946:6) point to its evolution through subspecies in the Santa Cruz Islands, where in _R. r. agilis_ Mayr the rufous of the lower back is restricted to the upper tail-coverts, and in _R. r. melanolaema_ Sharpe and _R. r. utupuae_ Mayr the rufous is absent. In the latter two subspecies, as well as in _R. r. kubaryi_, the forehead is white instead of rufous. The invasion of Micronesia by _Rhipidura_ has undoubtedly been the result of abnormally long flights by a relatively weak flyer. The fact that _Rhipidura_ has succeeded in establishing itself at only a few of the seemingly suitable islands in Micronesia may indicate that the possibilities for chance migration and resulting colonization are small, but that new colonization may be expected in the future. It is my opinion that the populations of _Rhipidura_, as I have observed them in Micronesia, are small because each individual or pair of birds is dependent on a relatively large area of woodland to satisfy its habitat requirements, especially for food. This suggestion needs to be tested by observation made in the field. In comparison with the insect fauna of New Guinea or some other large island, that of Micronesia is indeed small in number of kinds. Hesse, Allee and Schmidt (1937:524) explain the absence of insectivorous animals such as "swallows, swifts, flycatchers, and insectivorous bats" in island communities on the basis of the small number of flying insects in these communities. Probably _Rhipidura_ is able to forage for sedentary insect life as well as for the flying forms. =Metabolus rugensis= (Hombron and Jacquinot) Truk Monarch _Muscicapa Rugensis_ Hombron and Jacquinot, Ann. Sci. Nat. Paris, (2), 16, 1841, p. 312. (Type locality, Roug = Truk.) _Monarcha rugensis_ Hartlaub, Archiv. f. Naturgesch., 18, 1852, p. 133 (Gruppe Roug. = Truk); _idem_, Journ. f. Ornith., 1854, p. 168 (Carolinen = Truk); _idem_, Proc. Zool. Soc. London, 1867 (1868), p. 829 (Hogoleu = Truk); Gray, Hand-list Birds, 1, 1869, p. 321 (Caroline = Truk); Giebel, Thes. Ornith., 2, 1875, p. 614 (Carolinae = Truk); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk). _Colluricincla rugensis_ Pucheran, Voy. Pôle Sud, Zool., 3, 1853, p. 62 (Ruk); Hartlaub, Journ. f. Ornith., 1854, p. 162 (Roug = Truk). _Metabolus rugensis_ Bonaparte, Comptes Rendus Acad. Sci. Paris, 38, 1854, p. 650 (no locality = Truk); Sharpe, Cat. Birds British Mus., 4, 1879, p. 238 (Ruk); Finsch, Proc. Zool. Soc. London, 1880, p. 575 (Ruk); Tristram, Cat. Birds, 1889, p. 197 (Ruk); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 19 (Ruk); Nehrkorn, Kat. Eiers., 1899, p. 26 (Ruk); Hartert, Novit. Zool., 7, 1900, p. 4 (Ruk); Matschie, Journ. f. Ornith., 1901, p. 112 (Ruk); Reichenow, Die Vögel, 2, 1914, p. 262 (Karolinen = Truk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Ruk); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zool., 63, 1919, p. 203 (Truk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 63 (Ruk); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 470 (Ruk); Yamashina, Tori, 7, 1932, p. 404 (Truk); Hand-list Japanese Birds, rev., 1932, p. 178 (Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 197 (Truk); Mayr, Birds Southwest Pacific, 1945, p. 295 (Truk). _Monarcha (Metabolus) rugensis_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 19 (Caroline Islands). _Geographic range._--Micronesia: Caroline Islands--Truk. _Characters._--Adult male: White feathers (with dark bases) throughout except for black ones on forehead, lores, chin, and throat; chin and throat with steel-blue gloss; tips of second to fifth or seventh primaries black, black coloring extending along inner webs; shafts of primaries and basal half of tail feathers black; bill and feet black. Adult female: Resembles adult male, but generally sooty-black, darker above; under tail-coverts and sometimes rump splotched with white; white coloring may also be present on tips of secondaries, on chin, and on tail. Immature: Resembles adult, but bright cinnamon on upper parts and on wings and tail; inner webs of primaries grayish or dark brown, shafts of primaries lighter on basal half; lores, chin and throat white or washed with creamy-buff; breast and abdomen whitish, washed with cinnamon, sides darker rufous, under wing-coverts, axillaries, and under tail-coverts usually light rufous although somewhat variable in color; basal part of bill yellow, tip of bill horn colored. Immatures may be observed in all stages of color change toward the adult condition. _Measurements._--Measurements are listed in table 40. TABLE 40. MEASUREMENTS OF _Metabolus rugensis_ ================+==========+=========+=========+========= NUMBER AND SEX | Wing | Tail | Culmen | Tarsus ----------------+----------+---------+---------+--------- 8 males | 103 | 91 | 27 | 26 | (98-105) | (88-93) | (26-28) | (25-27) | | | | 6 females | 100 | 87 | 27 | 26 | (97-101) | (86-89) | (26-28) | (25-27) ----------------+----------+---------+---------+--------- _Specimens examined._--Total number, 27 (14 males, 13 females), as follows: Caroline Islands, USNM--Truk, 2 (Feb. 16, not dated); AMNH--Truk, 25 (Jan. 29, Feb. 1, 8, 10, 11, May 6, 9, June 11, 13, 14, 15, Oct. 11, 31, Nov. 2, 11, Dec. 3, 12, 17, 20). _Nesting._--Yamashina (1932a:404) reports on the taking of a nest containing one egg at Natsushima, Truk Atoll, in May, 1931. According to Hartert (1900:5) Owston's collectors obtained nests on June 1, 4, and 12. Two were in breadfruit trees about twenty feet above the ground. Each nest contained one egg. Hartert writes, "The eggs are cream-coloured, speckled with brownish red, more frequently and often very thickly on the large end, and with some deeper lying pale purplish grey patches, and one has some very fine black lines on the large end." _Molt._--A study of adult specimens obtained at various times of the year indicates that _Metabolus_ normally molts in the period from about October through January. Mayr (1933e:1-10) has studied the variation of immature and adult plumages in _Neolalage banksiana_ (Gray) and other birds pointing out the occurrence of "retarded" and "progressive" plumages. Bogert has followed this work in interpreting the condition of the plumages in _Metabolus_, and through the kindness of Ernst Mayr I have examined Bogert's unpublished manuscript on the series of _Metabolus_ at the American Museum of Natural History, from which the following account of the plumage is taken. In the series of skins, there are specimens of non-molting, immature males with "normal" plumage (that is to say, plumage with upper parts cinnamon-colored and lower parts whitish and darker buff) taken in October and in February. There are also specimens of non-molting, immature females with "normal" plumage taken in November and in May. These immatures are in fresh or slightly worn plumages. In addition, there is one non-molting, male specimen (November) which has some white on the crown and throat, some black on the lores and chin, but because the black feathers are fresh, the specimen is considered to be a "transition" bird and may be either a "retarded" adult or a "progressive" immature male. One non-molting female (October) shows some sooty-black mottling on the chin and throat and a few black feathers on the crown; this is apparently a "progressive" immature because the lower mandible has a yellow basal part, characteristic of the immature. Another female (June) shows black feathers on the crown, nape, chin, throat, and breast; this bird is in the process of molting with the black feathers representing new growth and is an immature assuming the adult condition--in "progressive" plumage. One non-molting male (January) has an intermingling of white feathers in the cinnamon coloring of the head and body, black on the forehead, chin and throat, primaries black with cinnamon edges, and bill similar in color to that of the adult; it is considered to be an adult with "retarded" plumage. Two molting males (December) resemble adults except for cinnamon coloring on shoulders, back, primaries, retrices and a slight cinnamon wash on breast feathers; these may be "retarded" adults. One molting female (June) has mixed cinnamon and sooty-black feathering; this may also be a "retarded" adult. Another molting female (December) with more sooty-black feathering and less cinnamon feathering is also considered to be a "retarded" adult. In fully adult birds there is considerable individual variation, especially in the males where the amount of black on the throat, the extent of the black on the terminal part of the primaries, and the extent of the black on the basal part of the tail feathers is variable. Scattered white feathers may be present on adult females. _Remarks._--Hombron and Jacquinot first obtained the Truk Monarch, but it was not until the time of Kubary and of the Japanese collectors of Owston that very much was learned concerning the bird. In 1945, McElroy of the NAMRU2 party reported that he found no birds at the several islands of Truk that he visited in December. Some of the Japanese residents of the islands told McElroy that they did not know the bird. Evidently, its numbers are low or it has been eliminated, at least on the islands then populated by the Japanese. _Metabolus_ belongs to a group of flycatchers including the genera _Pomarea_, _Mayrornis_, _Neolalage_, _Monarcha_, and _Clytorhynchus_. The different plumages of the adults and the immatures are not unusual in this group of genera, this feature being observed in many of the flycatchers of Oceania. Mayr (1933c:1) points out some of the relationships between _Metabolus_ and some of these other genera; he comments that all of them have rather thin bills, in contrast to those of other flycatchers. _Metabolus_ became established at Truk probably as the result of an independent colonization. It is a well differentiated genus showing little resemblance to _Monarcha godeffroyi_ of Yap. In looking over the genera found in the Pacific area, it appears that _Metabolus_ is closest to _Clytorhynchus_ of the Melanesian region, especially to _Clytorhynchus hamlini_ Mayr, which is resident at Rennell in the Solomon Islands. The bills of these two birds are similar, both being long and thin, with a pronounced hook. In coloration there is some resemblance; _C. hamlini_ has the blackish forehead and chin like the male _Metabolus_ and also the burnt-orange underparts. In _C. hamlini_, however, the sexes are similar, _Metabolus_ also resembles _C. nigrogularis_. Like _Metabolus_, the immatures of this latter species are different in color from the adults. =Monarcha godeffroyi= Hartlaub Yap Monarch _Monarcha godeffroyi_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 829, pl. 38. (Type locality, Yap.) _Monarcha godeffroyi_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 50 (Yap); Sharpe, Cat. Birds British Mus., 4, 1879, p. 432 (Yap); Nehrkorn, Journ. f. Ornith., 1879, p. 403 (Yap); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 56 (Yap); Dubois, Syn. Avium, 1, 1902, p. 289 (Yap); Reichenow, Die Vögel, 2, 1914, p. 261 (Yap); Mayr, Birds Southwest Pacific, 1945, p. 295 (Yap). _Monarcha godeffroyi_ Gray, Hand-list Birds, 1, 1869, p. 321 (Yap); Hand-list Japanese Birds, rev., 1932, p. 175 (Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 194 (Yap). _Monarches godeffroyi_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 97 (Yap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 63 (Yap). _Pomarea godeffroyi_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 19 (Yap); Matschie, Journ. f. Ornith., 1901, p. 112 (Yap). _Monarcharses geoffroyii_ Mathews, Bull. British Ornith. Club, 45, 1925, p. 94 (new generic name); _idem_, Syst. Avium Australasianarum, 2, 1930, p. 514 (Yap). _Monarcharses godeffroyi_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 486 (Yap?). _Geographic range._--Micronesia: Caroline Islands--Yap. _Characters._--Adult male: according to Sharpe (1879:432). "General colour above white, from the hind neck to the rump and including scapulars; wings black, the quills browner; upper tail-coverts and tail black; head all around black, including the lower throat; sides of neck and rest of under surface, from the foreneck downwards, pure white; thighs and under tail-coverts black; under wing-coverts black, quills ashy blackish below; white along the inner edge of the primaries; 'bill entirely blue; feet whitish blue; iris black' (Kubary M. S.)." Adult female: "Entirely black, excepting the hind neck and upper mantle, sides of neck, lower throat, and fore neck, which are pure white" (Sharpe, 1879:432). Immature: "Above brown, the head and hind neck ashy grey, the scapulars rufescent at the tips, the rump rufous, becoming paler and more fulvous on the upper tail-coverts; wing-coverts dusky brown, broadly edged externally with rufous-buff, becoming fulvous on the median and greater coverts; quills dark brown, externally edged with rufous, the primaries narrowly, the secondaries more broadly, the innermost of the latter edged and tipped with buff; tail-feathers ashy brown, narrowly edged with ochraceous brown and tipped with white, more broadly on the outer feathers; lores and a broad eyebrow rufous-buff; ear-coverts rather deeper rufous, shading on to the sides of the throat; under surface of body light cinnamon-rufous inclining to rufous on the throat and under tail-coverts; under wing-coverts light cinnamon, like the breast; quills light brown below, whitish along the inner web; 'bill horn-colour, the point brown, under mandible paler, feet dirty white, iris black' (Kubary M. S.)." (Sharpe, 1879:433). _Remarks._--No specimens of this species have been seen by me. Most taxonomists have regarded this bird as a member of the genus _Monarcha_, although Mathews did propose the name _Monarcharses_ for this bird. On the basis of descriptions and pictures (especially plate 38 in Hartlaub, 1868:828) the bird appears to be related to the monarch flycatchers of the Melanesian area. It may be closest to _Monarcha menckei_ from the Bismarcks, _M. manadensis_ of the New Guinea region, _M. barbatus_ from the Solomons or to _M. leucurus_ from Buru. The drab color of the immatures and the black and white color of the adults are characteristics of the Yap Monarch which are shared with some of the other species of _Monarcha_. The connection between _M. godeffroyi_ and _Metabolus rugensis_ of Truk is not known, but they evidently represent separate colonizations. _M. takatsukasae_ of Tinian appears to be an offshoot of _M. godeffroyi_ of Yap, in which the black and white plumage has been suppressed (or never developed). As indicated by the published descriptions, the immature of _M. godeffroyi_ shows a close resemblance to the adult of _M. takatsukasae_. The latter also shows relationships to immature specimens of _M. leucotis_ and to _M. guttula_ of Melanesia. The relationship of the two species of _Monarcha_ in Micronesia to the Hawaiian Flycatcher, _Chasiempsis sandwichensis_ is not known. It is apparent that this Hawaiian form was derived from some ancestor from Melanesia, which arrived in the Hawaiian Islands by way of either Polynesia or Micronesia. Mayr (1943:45) has already pointed out that _Chasiempsis_ is "related to the _Monarcha_ group (_Pomarea_, _Mayrornis_, etc.)." =Monarcha takatsukasae= (Yamashina) Tinian Monarch _Monarcharses takatsukasae_ Yamashina, in Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 485. (Type locality, Tinian.) _Monarcha takatsukasae_ Yamashina, Tori, 7, 1932, p. 400 (Tinian); Hand-list Japanese Birds, rev., 1932, p. 175 (Tinian); Hand-list Japanese Birds, 3d ed., 1942, p. 195 (Tinian); Mayr, Birds Southwest Pacific, 1945, p. 296 (Tinian); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 100 (Tinian). _Geographic range._--Micronesia: Mariana Islands--Tinian. _Characters._--Adult male: Forehead, lores, eyering, auriculars, and underparts rufous, chin paler; under tail-coverts white; crown and nape dark slate-gray; back reddish-brown; rump white; wing and tail dark brown, outer edges of first three primaries white, tail with white tips, more broadly tipped on outer tail feathers; outer edges of scapulars and secondaries buffy but tips more whitish, forming two wing bars; under wing-coverts whitish; bill slate-blue, tip pearl; feet dark slate; iris dark brown. Adult female: Resembles adult male, but slightly smaller and crown more brownish. Immature: Resembles adult, but base of bill lighter and underparts paler. According to the original description by Yamashina, _M. takatsukasae_ resembles closely the immature _M. godeffroyi_ of Yap in coloration; however, the Tinian Monarch has a shorter wing. _Measurements._--Measurements are listed in table 41. TABLE 41. MEASUREMENTS OF _Monarcha takatsukasae_ ================+=========+=========+=============+============= NUMBER AND SEX | Wing | Tail | Full culmen | Tarsus ----------------+---------+---------+-------------+------------- 6 males | 70 | 68 | 18.0 | 22.0 | (67-72) | (65-70) | (17.5-19.0) | (21.0-23.0) | | | | 10 females | 67 | 67 | 17.2 | 22.5 | (65-68) | (64-69) | (17.0-19.0) | (21.7-23.0) ----------------+---------+---------+-------------+------------- _Specimens examined._--Total number, 20 (10 males, 10 females), as follows: Mariana Islands, USNM--Tinian, 10 (Oct.); AMNH--Tinian, 9 (Sept.); KMNH--Tinian, 1 (Sept.). _Nesting._--Yamashina (1932a:400, 401) records two nests of the Tinian Monarch. He writes of one nest containing two eggs taken at Churo, Tinian, on January 29, 1932, that was "hung on a fork of an upward pointing branch of a road side tree commonly called 'Oba' 1.5 m. high from the ground in a forest.... The ground color of the egg shells is white. The spots are pale reddish-brown and distributed all round the surface like small dots, being concentrated especially round the larger end." Another nest containing three eggs was found on January 29, 1932. Yamashina writes that the eggs measure 20.5 x 15, 21 x 15, and 18 x 15 mm. In describing these nests Yamashina notes, "The shape of the two nests mentioned above is like a deep cup. The outer layer of them is made chiefly of dead leaves, fibers, cotton, wools and moss, and the inner layer of fine stems and fibers only." Downs (1946:101) writes that a nest found near Lake Hagoi at Tinian on August 31, 1945, "was about three feet from the ground carefully woven into the framework of a triangular crotch.... It was composed exteriorly of small leaves, scattered white feathers, and heavy grass; interiorly of grasses only." In the nest he found a young bird which "was black-skinned, with ugly white quills and a few short dark feathers on its tail and wings. The back feathers were rusty brown as were the tufted head feathers." Marshall (1949:219) assumes that this bird breeds all year. _Molt._--Birds taken by Coultas in September are in fresh plumage. _Remarks._--The Tinian Monarch is known only from Tinian, where it was described in 1931 by Yamashina. Downs (1946:100-103) presents a detailed account of this bird as he saw it in 1945. He found it living in brushy woodlands where other birds, including _Rhipidura rufifrons_, were observed. From his description, the actions and food-catching behaviors of this bird must be much like those of _Rhipidura_. Gleise (1945:220) estimated the population of these birds to be 40 to 50 in 1945. =Myiagra oceanica erythrops= Hartlaub and Finsch Micronesian Broadbill _Myiagra erythrops_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 6. (Type locality, Pelew Islands.) _Myiagra erythrops_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 117, 118 (Pelew Islands); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 97 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 20 (Palau); Giebel, Thes. Ornith., 2, 1875, p. 658 (Pelew); Nehrkorn, Journ. f. Ornith., 1879, pp. 399, 403 (Palau); Sharpe, Cat. Birds British Mus., 4, 1879, p. 383 (Pelew); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 23 (Pelew); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 195 (Palaos); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 55 (Palau); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Palau); Dubois, Syn. Avium, 1, 1902, p. 283 (Pelew); Reichenow, Die Vögel, 2, 1914, p. 260 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 64 (Pelew); Yamashina, Tori, 10, 1940, p. 674 (Palau); Handlist Japanese Birds, 3d ed., 1942, p. 195 (Babelthuap, Koror); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 69 (Peleliu, Ngabad, Garakayo). _Submyiagra erythrops_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 504 (Palau); Hand-list Japanese Birds, rev., 1932, p. 176 (Palau). _Myiagra oceanica erythrops_ Mayr, Birds Southwest Pacific, 1945, p. 296 (Palau). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Ngabad. _Characters._--Adult male: Crown, occiput, nape, and auriculars dark "slate-blue"; forehead, lores and orbital ring dark "cinnamon-rufous"; black and upper wing-coverts olive-brown; rump more like crown; underparts near "cinnamon," paler on middle of abdomen, sides, and under tail-coverts; wings and tail dark brown, edged with white; secondaries edged with brownish; under wing-coverts whitish with dusky bases; bill and feet black. Adult female: Resembles adult male, but slightly smaller and paler in color. Immature: Resembles adult, but head and rump browner; forehead, lores, and orbital ring sandy in some individuals, more rufous in others; underparts usually paler than in adult; bill basally lighter. _Measurements._--Measurements are listed in table 42. TABLE 42. MEASUREMENTS OF ADULT SPECIMENS OF _Myiagra oceanica_ ==================+============+=========+=========+=============+========== | Number | | | | SUBSPECIES | and sex | Wing | Tail | Full culmen | Tarsus ------------------+------------+---------+---------+-------------+---------- _M. o. erythrops_ | 14 males | 69 | 53 | 16.4 | 19.5 | | (68-71) | (51-56) | (16.0-17.3) | (18.5-20) | | | | | | 11 females | 66 | 51 | 16.1 | 19.5 | | (64-68) | (48-53) | (15.5-17.0) | (18.5-20) | | | | | _M. o. freycineti_| 25 males | 70 | 60 | 16.3 | 19.5 | | (67-73) | (57-64) | (15.8-17.0) | (18.5-20) | | | | | | 16 females | 67 | 57 | 16.0 | 19.0 | | (65-70) | (55-62) | (15.5-17.0) | (18.0-19) | | | | | _M. o. oceanica_ | 11 males | 81 | 68 | 20.1 | 20.0 | | (78-83) | (65-71) | (19.5-20.5) | (19.5-21) | | | | | | 10 females | 79 | 66 | 20.0 | 20.0 | | (77-81) | (65-68) | (20.0-20.5) | (19-20.5) | | | | | _M. o. pluto_ | 14 males | 82 | 74 | 17.5 | 19.0 | | (79-83) | (71-77) | (17.5-18.0) | (18.5-20) | | | | | | 14 females | 80 | 73 | 17.5 | 19.0 | | (78-84) | (69-77) | (17.0-18.0) | (18.5-20) ------------------+------------+---------+---------+-------------+---------- _Specimens examined._--Total number, 33 (17 males, 15 females, 1 unsexed), as follows: Palau Islands, USNM--Babelthuap, 1 (Nov. 27)--Koror, 4 (Nov. 6, 19, 26)--Garakayo, 1 (Sept. 18)--Peleliu, 2 (Aug. 30)--Ngabad, 2 (Sept. 11); AMNH--exact locality not given, 23 (Oct., Nov., Dec.). _Molt._--Molt apparently takes place in fall and early winter. Of the specimens examined, there is little evidence of molt in those obtained in August and September while there is considerably more evidence of molt in those taken in November and December. _Food habits._--A bird taken by the writer on September 17, 1945, at Garakayo had approximately one-half cc. of insect parts in its stomach. _Remarks._--The Micronesian Broadbill at Palau is a friendly little bird and easily called-up to within a few yards of a person by imitating its note. It was seen by the NAMRU2 party in 1945 as singles and in pairs in the dense underbrush of the undisturbed forested areas. The bird was seen at only one woodland area at Peleliu (Southeastern Peninsula), but it was observed more frequently on the smaller islands of Ngabad and Garakayo. Coultas (field notes) also notes that in 1931 this bird was found more frequently on the smaller islands. _Myiagra_ was found to be much less conspicuous at Palau than _Rhipidura lepida_. _Myiagra_ appears to be less active, more solitary in its habits, and possibly more restricted in the territory that it covers in feeding than _Rhipidura_. =Myiagra oceanica freycineti= Oustalet Micronesian Broadbill _Myiagra freycineti_ Oustalet, Bull. Soc. Philom. Paris, (7), 5, 1881, p. 73. (Type locality, Mariannes = Guam.) _Myiagra freycineti_ Reichenow and Schalow, Journ. f. Ornith., 1884, p. 395 (Mariannes = Guam); Oustalet, Le Nat., 1889, p. 260 (Mariannes = Guam); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 24 (Marianne = Guam); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 194 (Guam); Hartert, Novit. Zool., 5, 1898, p. 54 (Guam); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 50 (Guam); Safford, Osprey, 1902, p. 69 (Guam); _idem_, Amer. Anthro., 4, 1902, p. 711 (Guam); _idem_, The Plant World, 7, 1904, p. 263 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Reichenow, Die Vögel, 2, 1914, p. 260 (Marianen); Cox, Island of Guam, 1917, p. 21 (Guam); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 65 (Guam); Bryan, Guam Rec., vol. 13, no. 2, 1936, p. 25 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 195 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 68 (Guam). _Submyiagra freycineti_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 504 (Guam); Hand-list Japanese Birds, rev., 1932, p. 176 (Guam). _Myiagra oceanica freycineti_ Mayr, Birds Southwest Pacific, 1945, p. 296 (Guam). _Myiagra oceanica_ Strophlet, Auk, 1946, p. 539. (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam. _Characters._--Adult male: A small flycatcher with head and neck near "dark delft blue" with a metallic luster; lores and anterior forehead ashy-gray, more bluish and darker on auriculars and sides of neck than on lores; back and upper wing-coverts near "green-blue slate" but darker and with metallic luster less apparent than on head; rump grayer than back; chin and throat white; breast light "cinnamon," fading to pale buff and white on abdomen, sides, and under tail-coverts; tibia smoky-gray, tips of feathers paler; wings dark brown edged with light bluish-gray; tail bluish-slate, especially middle rectrices, tips of tail feathers edged with white; bill and feet black; iris dark brown. Adult female: Resembles adult female of _M. o. erythrops_, but crown and neck near "deep Payne's gray," auriculars grayer than neck; anterior forehead and lores buffy and tinged with cinnamon; back browner than lores with upper wing-coverts and scapulars edged with slightly lighter brown; rump resembles crown but grayer; underparts paler than those of _M. o. erythrops_, especially chin and throat; tibia more brownish. Immature male: Resembles adult male, but back more brown and less blue-green, lacking luster; anterior forehead more rufous; scapulars, upper wingcoverts, and wings edged with light brown; underparts variable but generally more buffy than those of adult. Immature female: Resembles adult female, but more brown and less blue on head and back; underparts more buffy; base of bill paler. _Measurements._--Measurements are listed in table 42. _Weights._--The author (1948:68) records the weights of five adult males as 10.5-12.5 (11.9), and those of two adult females as 11.4 and 12.0 grams. _Specimens examined._--Total number, 64 (33 males, 22 females, 9 unsexed), as follows: Mariana Islands, USNM--Guam, 26 (Jan. 21, March 16, May 21, 29, 30, June 1, 3, 14, 24, 26, July 10, 12, 13, 20, 23, Aug. 30); AMNH--Guam, 38 (Jan., Feb., March, July, Aug.). _Nesting._--The writer (1948:68) records a nest containing one egg found by Muennink at Guam near Mt. Santa Rosa on May 7, 1945. The nest was in a bamboo stump approximately six feet from the ground. The egg hatched on about May 21. Seale (1901:50) reports on a nest and egg taken in the period from May to July. The NAMRU2 party obtained a female on March 15 with an enlarged gonad. Strophlet (1946:539) observed a pair of broadbills building a nest on September 20, 1945; it was completed on October 4 and was approximately seven feet above the ground. Hartert (1898:33) reports on a nest taken at Guam on February 14, 1895. _Molt._--As shown by the specimens examined, molt begins in June or July. _Food habits._--The stomach of a bird obtained on January 21, 1945, contained one unidentified bug (Hemiptera) and several parts of other insects. _Remarks._--The Micronesia Broadbill at Guam is not a common bird, and like its relative _Rhipidura rufifrons_ is an inhabitant of forested areas, especially those containing brushy undercover. It is an active bird, although less conspicuous than _Rhipidura_. The birds were found as singles or in pairs. The pair of birds which had a nest at the west base of Mount Santa Rosa in May, 1945, allowed the observers to approach closely to them. The birds are easily attracted by squeaking sounds. There is considerable variation in the amount of cinnamon coloring on the breasts of adult birds. The Micronesian Broadbill at Guam was first discovered by Quoy and Gaimard, who called it "Moucherolle à gorge rouge." Kittlitz (1836:304) evidently records two species of flycatchers from Guam, which he calls _Muscicapa_. I judge these birds to be _Myiagra_ and _Rhipidura_. It was not until 1881 that Oustalet recognized this bird to be new. The first large series of specimens was obtained by Marche for the Paris Museum and was reported on by Oustalet (1895:194). Marche collected 12 skins in August and September, 1887, and 4 additional skins in February, 1889. =Myiagra oceanica oceanica= Pucheran Micronesian Broadbill _Myiagra oceanica_ Pucheran, Voy. Pôle Sud, Zool., 3, 1853, p. 77. (Type locality, Hogoleu = Truk.) _Myiagra oceanica_ Hartlaub, Journ. f. Ornith., 1854, p. 168 (Carolinen = Truk); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 18 (Hogoleu = Truk); Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 94 (Hogoleu = Truk); Gray, Hand-list Birds, 1, 1869, p. 328 (Caroline Is. = Truk); Pelzeln, Journ. f. Ornith., 1875, p. 51 (Hogoleu = Truk); Sharpe, Cat. Birds British Mus., 4, 1879, p. 383 (Hogoleu = Truk); Nehrkorn, Journ. f. Ornith., 1879, p. 403 (Ruk); Finsch, Proc. Zool. Soc. London, 1880, p. 575 (Ruk); Oustalet, Bull. Soc. Philom. Paris, (7), 5, 1881, p. 73 (Carolines = Truk); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk); Reichenow and Schalow, Journ. f. Ornith., 1884, p. 395 (Carolines = Truk); Tristram, Cat. Birds, 1889, p. 200 (Ruk); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 23 (Ruk); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 196 (Hogoleu = Truk); Nehrkorn, Kat. Eiers., 1899, p. 30 (Ruk); Hartert, Novit. Zool., 7, 1900, p. 5 (Ruk); Matschie, Journ. f. Ornith., 1901, pp. 111, 112, 113 (Ruck); Dubois, Syn. Avium, 1, 1902, p. 283 (Hogoleu = Truk); Reichenow, Die Vögel, 2, 1914, p. 260 (Karolinen = Truk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Ruk); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 204 (Truk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 64 (Ruk); Hand-list Japanese Birds, 3d ed., 1942, p. 195 (Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 68 (Truk). _Myiagra albiventris_ Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 93 (Hoguleu = Truk); Giebel, Thes. Ornith., 2, 1875, p. 658 (Carolinae = Truk). _Submyiagra oceanica_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 505 (Ruk); Hand-list Japanese Birds, rev., 1932, p. 175 (Truk). _Myiagra oceanica oceanica_ Mayr, Birds Southwest Pacific, 1945, p. 296 (Truk). _Geographic range._--Micronesia: Caroline Islands--Truk. _Characters._--Adult male: Resembles _M. o. freycineti_, but larger with crown and nape less green and with less metallic luster; lores and anterior forehead darker gray; chin, throat, and sides of neck more buffy-cinnamon; back, rump, upper wing-coverts, and scapulars less blue and more ashy gray; tibia, wings, and tail more brownish. Adult female: Resembles adult male, but smaller with less blue and more gray on crown; lores and anterior forehead lighter. Immature: Resembles adult, but crown and nape grayish, slate-blue; under-parts paler. _Measurements._--Measurements are listed in table 42. _Specimens examined._--Total number, 23 (12 males, 10 females, 1 unsexed), as follows: Caroline Islands, USNM--Truk, 2 (Feb. 16); AMNH--Truk, 21 (Feb., June, Nov., Dec.). _Nesting._--Hartert (1900:5) reports the taking of several nests in the period from March to July by Owston's Japanese collectors. One nest contained two eggs, the other nests contained one. _Remarks._--The broadbill at Truk was first taken by Hombron and Jacquinot, who called it "Platyrhynque océanien." Later, Kubary obtained material which was studied by Finsch (1880e:575). In December, 1945, McElroy of the NAMRU2 party examined two adults with enlarged gonads. Specimens obtained by him at Truk were lost in shipment to the United States. In coloration this subspecies is closest to _M. o. freycineti_; in size it is closest to _M. o. pluto_. =Myiagra oceanica pluto= Finsch Micronesian Broadbill _Myiagra pluto_ Finsch, Proc. Zool. Soc. London, 1875 (1876), p. 644. (Type locality, Ponapé.) _Myiagra pluto_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 17, 19 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 779 (Ponapé); Sharpe, Cat. Birds British Mus., 4, 1879, p. 380 (Ponapé); Nehrkorn, Journ. f. Ornith. 1879, p. 404 (Ponapé); Finsch, Journ. f. Ornith., 1880, p. 288 (Ponapé); _idem_, Proc. Zool. Soc. London, 1880, p. 576 (Ponapé); _idem_, Ibis, 1881, pp. 110, 112, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 280 (Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 23 (Ponapé); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 195 (Ponapi); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 55 (Ponapé); Nehrkorn, Kat. Eiers., 1899, p. 26 (Ponapé); Christian, The Caroline Islands, 1899, p. 358 (Ponapé); Matschie, Journ. f. Ornith., 1901, pp. 111, 112, 113 (Ponapé); Dubois, Syn. Avium, 1, 1902, p. 283 (Ponapi); Reichenow, Die Vögel, 2, 1914, p. 260 (Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, p. 54 (Ponapé); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 204 (Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 64 (Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 195 (Ponapé). _Submyiagra pluto_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 505 (Ponapé); Yamashina, Tori, 1, 1932, p. 401 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 176 (Ponapé). _Myiagra oceanica pluto_ Mayr, Birds Southwest Pacific, 1945, p. 296 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult male: A dark, bluish-gray broadbill with head, ear-coverts, and nape dark, metallic, steel-blue; back and rump darker and more slate-blue than head; upper tail-coverts blackish; tail black edged with greenish gloss; wings dark brown, scapulars and secondaries with outer edges tinged with metallic bluish-gray; lores black; chin, throat, and upper breast dark with light metallic-blue wash; lower breast and abdomen slate-gray; under wing-coverts brownish-black; bill black; feet bluish-black; iris dark brown. Female resembles male, but slightly smaller and somewhat duller. Immature duller. _Measurements._--Measurements are listed in table 42. _Specimens examined._--Total number, 42 (23 males, 19 females), as follows: Caroline Islands, USNM--Ponapé, 3 (Feb. 11); AMNH--Ponapé, 39 (Nov., Dec.). _Nesting._--Yamashina (1932a:401) records nests and eggs of the Ponapé broadbill. The nests were at heights of between .9 and 2.2 meters above the ground. Nests, each containing a single egg, were obtained on July 21, 25, and August 6. The eggs measure 19.5 by 16, 20.5 by 15.7, 20.5 by 16, and 20.2 by 16. Coultas (field notes) describes the nest as a cup-shaped structure, made of fine grasses and ferns, and placed in small trees and bushes at low elevations. Of specimens taken by Coultas in November and December, 1931, approximately fifty percent of the males had enlarged gonads. According to his specimen labels, none of the females was in breeding condition. _Molt._--Of the large series of broadbills taken by Coultas, approximately twenty percent of those taken in November were in molt whereas only approximately ten percent of those taken in December were in molt. Specimens taken in February were not in molt. It is evident that molting takes place in the fall, possibly from August to December. _Remarks._--The coloration of the Micronesian Broadbill at Ponapé is in marked contrast to that of other representatives of _Myiagra_ in Micronesia, being dark, bluish-gray in color. Probably the bird has taken on melanistic characters, which is not unusual in birds which have become isolated; examples of this condition may be observed in _Rhipidura_, _Terpsiphone_ and other genera. Coultas (field notes) writes that the bird is "Common everywhere on the island except in the grasslands. Two birds are working together usually, darting around in the low trees, among the branches or on the ground. The birds are playful, friendly and inquisitive. I should not call them noisy as one or more will sit for many minutes watching the intruder without making a peep. Their call, "Que Que," is a spasmodic outburst that might be repeated many times or just once. The male, presumably, erects the long crown feathers when calling. Perhaps both male and female do this, I can't say. The bird flutters on the wing and displays the feathers as does _Rhipidura_. When sitting, the bird often erects the crest and fluffs the tail and feathers." _Evolutionary History of Myiagra oceanica._--According to Mayr (1933d:1) _Myiagra_ "is easily recognizable by its broad bill and the color pattern which is similar in all species." The range of the genus _Myiagra_ extends from Australia and Tasmania westward to Timor, northward to the Moluccas, and Micronesia, and eastward to Polynesia. _Myiagra oceanica_ is restricted to Micronesia and consists of four subspecies, which until recently have been considered as four separate species. Unlike many of the species of this genus, _M. oceanica_ shows comparatively little sexual dimorphism. The male of _M. oceanica_ has metallic coloring on the head and the upper back and often has rich, rufous coloring on the breast. The female is less brilliant in coloring, lacking the sheen. The four subspecies vary from each other in size, color and even, to some extent, in basal breadth of the bill. _M. oceanica_ resembles several broadbills, including _M. galeata_ of the Moluccas, _M. rubecula_ of Australia, _M. vanikorensis_ of Fiji, and _M. ruficollis_ of Australia and the Lesser Sundas; however, in my opinion, it has probably been derived from _M. galeata_ of the Moluccan area or from a closely related species. In Micronesia, _M. o. oceanica_ and _M. o. freycineti_ appear to resemble closely this parent stock, whereas _M. o. erythrops_ and _M. o. pluto_ are more differentiated but are considered to have been derived from this same colonization. _M. o. pluto_ bears some resemblance to _M. atra_ of the Papuan area, particularly in the dark coloring; this is probably only a parallel evolution, since they have little else in common. _M. vanikorensis_ of the Fiji area is close to _M. oceanica_ in color and structure; the two species, I suspect, have been derived from a common source rather than from each other. Study of the evolutionary history of the entire genus is necessary before we can understand fully the derivation of the Micronesian and Polynesian species. It seems safe to say that the center of dispersal has been in the Australian region; the lack of diversity of this genus within the Papuan area is at present unexplained. =Muscicapa narcissina narcissina= Temminck Narcissus Flycatcher _Muscicapa narcissina_ Temminck, Pl. Col., 3, 1835, pl. 577, fig. 1. (Type locality, Japan.) _Muscicapa narcissina narcissina_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in eastern Asia and Japan. Winters south to Malaysia. In Micronesia: Palau Islands--exact locality unknown. _Remarks._--Mayr (1945a:302) records the Narcissus Flycatcher as a migrant visitor to the Palau Islands on the basis of two specimens in the Turloff collection, formerly in the Zoölogical Museum in Hamburg. =Muscicapa griseisticta= (Swinhoe) Chinese Gray-spotted Flycatcher _Hemichelidon griseisticta_ Swinhoe, Ibis, 1861, p. 330. (Type locality, Amoy.) _Hemichelidon griseisticta_ Hand-list Japanese Birds, rev., 1932, p. 175 (Koror); Hand-list Japanese Birds, 3d ed., 1942, p. 194 (Koror). _Muscicapa griseisticta_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau); Marshall, Condor, vol. 51, 1949, p. 221 (Palau). _Geographic range._--Breeds in northwestern Asia and Japan. Winters south to Malaysia. In Micronesia: Palau Islands--Koror. _Remarks._--The Chinese Gray-spotted Flycatcher is a casual winter visitor to the Palaus. Marshall (1949:221) took two specimens at Palau on November, 1945. =Colluricincla tenebrosa= (Hartlaub and Finsch) Palau Morning Bird _Rectes tenebrosus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 6. (Type locality, Pelew Islands.) _Rectes tenebrosus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 118 (Pelew Islands); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 99 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 18, pl. 3, fig. 1 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 27 (Pelew). _Colluricincla tenebrosa_ Gray, Hand-list Birds, 1, 1869, p. 386 (Pelew); Dubois, Syn. Avium, 1, 1902, p. 496 (Pelew); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 5 (Palau); _idem_, Birds Southwest Pacific, 1945, p. 297 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 69 (Peleliu, Ngabad, Garakayo). _Pinarolestes tenebrosus_ Sharpe, Cat. Birds British Mus., 3, 1877, p. 298 (Pelew); Matschie, Journ. f. Ornith., 1901, p. 112 (Palau); Reichenow, Die Vögel, 2, 1914, p. 296 (Palau); Takasukasa and Kuroda, Tori, 1, 1915, p. 54 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 69 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 174 (Palau). _Myiolestes tenebrosus_ Tristram, Cat. Birds, 1899, p. 188 (Pelew). _Caleya tenebrosus_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 649 (Pelew). _Malacolestes tenebrosus_ Mayr, Amer. Mus. Novit., no. 590, 1933, p. 5 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 193 (Babelthuap, Koror, Peliliu). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Ngabad. _Characters._--Adult: Upper parts between "snuff brown" and "bister," head blacker; chin, throat, and upper breast like upper parts but darker; lower breast and abdomen lighter and more buffy, sides darker; feathers of underparts with darker shafts producing a streaked appearance; underside of wing and under tail-coverts light-colored; bill dark brown; feet lighter brown; iris yellowish. Female smaller. Immature: Resembles adult, but head and neck lighter; ear-coverts, sides of neck, throat, upper breast darker; lower breast and abdomen paler. _Measurements._--Measurements are listed in table 43. TABLE 43. MEASUREMENTS OF _Colluricincla tenebrosus_ ================+===========+=========+=============+========= NUMBER AND SEX | Wing | Tail | Full culmen | Tarsus ----------------+-----------+---------+-------------+--------- | | | | 20 males | 104 | 76 | 23.5 | 31 | (100-107) | (73-79) | (22.5-24.5) | (29-31) | | | | 9 females | 97 | 73 | 23.0 | 30 | (94-101) | (71-76) | (22.0-24.0) | (30-31) ----------------+-----------+---------+-------------+--------- _Specimens examined._--Total number, 32 (21 males, 11 females), as follows: Palau Islands, USNM--Koror, 6 (Nov. 5, 18)--Garakayo, 3 (Sept. 18)--Peleliu, 5 (Aug. 29, 30, Sept. 1, 6)--Ngabad, 2 (Sept. 11); AMNH--exact locality not given, 16 (Oct. 8, 13, 26, Nov. 11, 13, 17, 19, 21, 23, Dec. 9). _Molt._--The molting process in this species seemingly takes place from August until December. Most of the birds taken by the NAMRU2 party in August and September were in molt. Molting specimens were obtained by Coultas in October, November and December. _Food habits._--The Palau Morning Bird feeds on plant and animal materials. Stomachs obtained by the NAMRU2 party contained green plant material, seeds, insect parts, and grit. The bird feeds principally on the ground or in low bushes. _Remarks._--The Palau Morning Bird is a thrushlike bird which spends its time on or near the ground in areas where ground cover is thick. In 1945, the NAMRU2 party found the bird in the thick matting of vines which had covered over the battle-cleared areas. I did not find the bird at elevations of more than three to four feet above the ground. When flushed, it would flutter a short distance and disappear into the brush. It has a sweet song and may be considered as one of the finest singers in Micronesia. It heralds the break of day with its melodious carol, and its name is derived from its calling early in the morning. I heard the bird only infrequently in the hot part of the day, although it would sing when the skies were overcast. Its song could be heard also as evening approached. The bird is moderately common, and evidently is more abundant on the smaller islands than on Peleliu. Its occurrence on the smaller islands was noted also by Coultas. The taxonomic status of the Palau Morning Bird has been one of uncertainty as shown by the fact that the bird has been treated under six generic names since its discovery by Captain Tetens. Mayr (1933a:5) erected a new genus, _Malacolestes_, for the morning bird pointing to its differences from "_Rhectes_ (= _Pitohui_) and _Pinarolestes_ (= _Myiolestes_)." Later, he (1944b:5) disregards this name and places the bird in the genus _Colluricincla_ stating that its special characters "are due to isolation." This treatment is followed here. The Palau Morning Bird is the most northern representative of a group of birds which have their center of dispersal in the New Guinea and Australian area. As Mayr has pointed out, _C. tenebrosus_ appears closest to the _C. megarhynchus_ group of New Guinea. These species have bills of similar shape, coloration which is darker above and lighter below, soft feathers on underparts, and streaked appearance of throat and breast. The resemblances between _C. tenebrosus_ and _C. megarhynchus_ might be such as to indicate that these are merely subspecifically distinct from each other. =Artamus leucorhynchus pelewensis= Finsch White-breasted Wood-swallow _Artamus pelewensis_ Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 41. (Type locality, Palau.) _Artamus leucorhynchus_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 116, 118 (Pelew); _idem_, Proc. Zool. Soc. London, 1872, pp. 89, 99 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 18 (Palau); Walden, Ibis, 1876, p. 188 (Pelew). _Artamus pelewensis_ Finsch, Proc. Zool. Soc. London, 1877 (1878), p. 739 (Pelew); Tweeddale, Ibis, 1878, p. 385 (Pelew); Sharpe, Cat. Birds British Mus., 13, 1890, p. 9 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 26 (Pelew); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 62 (Palau); Matschie, Journ. f. Ornith., 1901, p. 112 (Palau); Dubois, Syn. Avium, 1, 1902, p. 533 (Pelew); Reichenow, Die Vögel, 2, 1914, p. 346 (Pelew). _Artamus leucorhynchus pelewensis_ Stresemann, Novit. Zool., 20, 1913, p. 293 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 193 (Babelthuap, Koror); Mayr, Birds Southwest Pacific, 1945, p. 297 (Palau). _Artamus melanoleucus pelewensis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 69 (Pelew); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 635 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 174 (Palau). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Angaur. _Characters._--Adult: Upper surface black, except for back which is slightly brownish and for rump which is white; underparts white, except for chin, throat and upper breast which are black; wings with grayish tips; bend of wing black; bill milky blue, nostril and tip black; feet black; iris dark brown. Immature: Resembles adult, but black feathers with brownish tinges; primaries tipped with white. _Measurements._--Measurements are listed in table 44. TABLE 44. MEASUREMENTS OF _Artamus leucorhynchus pelewensis_ Finsch ------------------+-----------+---------+---------+------------- Number and Sex | Wing | Tail | Culmen | Tarsus ------------------+-----------+---------+---------+------------- | | | | 5 males | 134 | 68 | 25 | 16.5 | (132-136) | (66-69) | (24-26) | -- | | | | 4 females | 134 | 68 | 24 | 17.0 | (132-136) | (67-69) | -- | (16.5-17.0) ------------------+-----------+---------+---------+------------- _Specimens examined._--Total number, 12 (7 males, 5 females), from Palau Islands, AMNH--exact locality not given (March, Nov., Dec.). _Remarks._--Little is known concerning the habits and distribution of the white-breasted Wood-Swallow at Palau. Coultas obtained a series of eight birds in 1931; he writes (field notes) that his native hunter took every bird that he saw. The natives told him that they did not know the nest of the bird. Coultas concluded that the bird was not common. He commented that it may be found perched in the top of a tree on a dead branch or "even displaying in the air." The NAMRU2 party found no evidence of this bird in the southern Palaus in 1945. The specimens obtained by Coultas in November and December, 1931, were in molt and had small gonads. This wood-swallow is the only Micronesian representative of _Artamus leucorhynchus_. Like several other species of birds it has become established only at the Palau Islands, and has either been unsuccessful in colonizing other parts of Micronesia or has not had the opportunity to do so. This bird had been compared with specimens representing ten subspecies of _A. leucorhynchus_ in Melanesia and Malaysia. _A. l. pelewensis_ differs from these subspecies examined by its blacker appearance, with only a faint brownish wash on the back, and by its shorter, first primary. The curvature of the upper mandible of the bird in the Palaus is similar to that of _P. l. leucorhynchus_ of the Philippines; the mandible is less curved than that of _P. l. celebensis_ of Celebes; the mandible is slightly thicker than that of _P. l. leucopygialis_ of the New Guinea and Australian region. In length of wing _P. l. pelewensis_ resembles closely _P. l. leucorhynchus_; _P. l. celebensis_ has a longer wing and _P. l. leucopygialis_ has a shorter one. Stresemann (1913:293) points to a close relationship between _P. l. pelewensis_ and _P. l. musschenbreeki_ of Tenimber and Babber islands and _P. l. melaleucus_ of New Caledonia; Mayr (1945a:284) says the bird in the Palaus came from the Papuan area. Probably _P. l. pelewensis_ has reached the Palau Islands from the New Guinea area by way of the Philippines. =Aplonis opacus opacus= (Kittlitz) Micronesian Starling _Lamproth[ornis] opaca_ Kittlitz, Kupfertaf. Naturgesch. Vögel, 2, 1833, p. 11, pl. 15, fig. 2. (Type locality, Ualan = Kusaie.) _Turdus colombinus_ Lesson (part), Traité d'Ornith., 1832, p. 406 (Carolines = Kusaie?). _Lamproth[ornis] opaca_ Kittlitz, Mém. Acad. Imp. Sci. St. Petersbourg, 2, 1935, p. 7 (Ualan); _idem_ (part), Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 285, 297 (Ualan); Pelzeln, Reise "Novara," Vögel, 1865, p. 68 (Ualan). _Lamprotornis columbinus_ Bonaparte (part), Consp. Avium, 1, 1850, p. 417 (Carolinen = Kusaie?). _Lamprotornis columbina_ Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 133 (Ualan); _idem_ (part), Journ. f. Ornith., 1854, p. 168 (Carolinen = Kusaie?); Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, p. 376 (Ualan). _Calornis opaca_ Gray (part), Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 26 (Oualau = Kusaie); Tristram, Cat. Birds, 1889, p. 255 (Kusaie); Hartert, Kat. Vogelsamml. Senckenb., 1891, p. 75 (Ualan). _Calornis kittlitzi_ Finsch and Hartlaub (part), Fauna Central polynesiens, 1867, p. 109 (Ualan, Puynipet, Marianen; type locality, by subsequent restriction, Ualan = Kusaie); Finsch (part), Journ. Mus. Godeffroy, 8, 1875, p. 23 (Ualan). _Calornis kittlitzii_ Hartlaub, Proc. Zool. Soc. London, 1867 (1868), p. 830 (Ualan). _Amadina Kittlitzi_ Gray, Hand-list Birds, 2, 1870, p. 58 (Ualan). _Calornis pacifica_ Sharpe, Ibis, 1876, p. 47 (Caroline Is. = Kusaie?); Finsch (part), Mitth. Ornith. Ver. Wien, 1884, p. 49 (Kuschai). _Calornis pacificus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, p. 32 (Ualan); _idem_ (part), Journ. f. Ornith., 1880, pp. 289, 301 (Kuschai); _idem_, (part), Proc. Zool. Soc. London, 1880, p. 576 (Kuschai); _idem_, (part), Ibis, 1881, pp. 103, 104, 108, 111 (Kuschai). _Aplonis kittlitzi_ Sharpe (part), Cat. Birds British Mus., 13, 1890, p. 136 (Kuschai); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 44 (Ualan); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 216 (Oualan); Hartert (part), Novit. Zool., 5, 1898, p. 59 (Ualan); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ualan); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Kusaie). _Lamprocorax kittlitzi_ Dubois (part), Syn. Avium, 1, 1902, p. 542 (Kuschai). _Aplonis opaca_ Oberholser, Bull. U. S. Nat. Mus., 98, 1917, p. 59 (Ualan); Wetmore (part), in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 219 (Kusaie). _Aplonis kittlitzi kittlitzi_ Momiyama (part), Tori, 2, 1920, p. 1 (Kusaie). _Aplonis opaca opaca_ Momiyama (part), Birds Micronesia, 1922, pp. 6, 12 (Kusaie); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 70 (Kusaie); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 847 (Kusaie); Takatsukasa and Yamashina, Tori, 7, 1931, p. 109 (Kusaie); Hand-list Japanese Birds, rev., 1932, p. 170 (Kusaie). _Aplornis opaca opaca_, Hand-list Japanese Birds, 3d ed., 1942, p. 188 (Kusaie). _Aplonis opacus opacus_ Mayr, Birds Southwest Pacific, 1945, p. 298 (Kusaie). _Geographic range._--Micronesia: Caroline Islands--Kusaie. _Characters._--Adult: Feathers black with dusky appearance caused by lighter bases; edges of feathers with slight amount of steel-green gloss; underparts slightly duller than upper parts; bill black, with maxilla rather strongly curved; feet black, iris yellow. Females slightly smaller. Immature: Resembles adult, but upper parts more brown and less black; underparts dusky with edges of feathers tinged with smoky yellow producing a streaked appearance; base of bill horn-colored. _Measurements._--Measurements are listed in table 45. _Specimens examined._--Total number, 30 (18 males, 12 females), as follows: Caroline Islands, USNM--Kusaie, 5 (Feb. 8); AMNH--Kusaie, 25 (Jan., Feb., March). TABLE 45. MEASUREMENTS OF ADULT SPECIMENS OF _Aplonis opacus_ ====================+============+=========+=======+========+=========== | Number | | | | Depth of SUBSPECIES | and | Wing | Tail | Full | culmen at | sex | | | culmen | nostril --------------------+------------+---------+-------+--------+----------- _A. o. opacus_ | 15 males | 124 | 80 | 24 | 9.5 | | 121-125 | 76-85 | 24-26 | 9.0-10.0 | | | | | | 12 females | 119 | 77 | 24 | 9.0 | | 115-125 | 72-82 | 23-26 | 8.5-9.0 | | | | | _A. o. ponapensis_ | 17 males | 133 | 87 | 27 | 9.5 | | 130-138 | 85-91 | 26-29 | 9.0-10.0 | | | | | | 11 females | 126 | 83 | 27 | 9.0 | | 122-127 | 81-85 | 26-28 | 8.5-9.0 | | | | | _A. o. angus_ | 16 males | 129 | 88 | 28 | 9.5 | | 125-131 | 84-92 | 27-29 | 8.0-9.0 | | | | | | 7 females | 124 | 85 | 27 | 8.5 | | 121-129 | 83-88 | 25-28 | 8.0-9.0 | | | | | _A. o. orii_ | 11 males | 128 | 86 | 27 | 7.5 | | 124-131 | 83-90 | 25-28 | 7.5-8.5 | | | | | | 7 females | 124 | 79 | 26 | 7.5 | | 121-126 | 77-82 | 25-27 | 7.5-8.0 | | | | | _A. o. guami_ | 41 males | 128 | 86 | 27 | 9.5 | | 120-136 | 81-92 | 24-29 | 8.5-10.5 | | | | | | 32 females | 121 | 84 | 26 | 9.5 | | 117-126 | 78-89 | 24-30 | 8.5-10.5 --------------------+------------+---------+-------+--------+----------- _Remarks._--The Micronesian Starling at Kusaie was first taken by Kittlitz (1833:11), who named it in the following manner: "_Turdus columbinus_ Gm. L. oder _Lamproth. opaca_ Lichtenstein." The bird was later given the name of _Calornis kittlitzi_ by Finsch and Hartlaub (1867:109). Oberholser (1917:59) has shown that the specific name _opaca_ is applicable, since the manuscript name _Lamprothornis opaca_ of Lichtenstein is made available by Kittlitz's published description and figure, and since it is the earliest name used. Mathews (1938:342) reports that the name _Aplornis_ appeared a few days before the name _Aplonis_. I have been unable to check his source of information. The Micronesia Starling is one of the most abundant birds at Kusaie. Coultas (field notes) observed the bird in all parts of the island, when he visited there in 1931. He found the bird in flocks of two to six or more and noted that birds in immature plumage seemed to outnumber the birds in adult plumage approximately five to one. This subspecies is characterized by the presence of only a slight amount of gloss on the black feathers of the adult. =Aplonis opacus ponapensis= Takatsukasa and Yamashina Micronesian Starling _Aplonis opaca ponapensis_ Takatsukasa and Yamashina, Tori, 7, 1931, p. 109. (Type locality, Ponapé.) _Calornis columbina_ Pelzeln, Reise "Novara," Vögel, 1865, pp. 88, 162 (Puynipet). _Calornis kittlitzi_ Finsch and Hartlaub (part), Fauna Centralpolynesiens, 1867, p. 109 (Puynipet); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 298 (Ponapé). _Calornis opaca_ Gray (part), Hand-list Birds, 2, 1870, p. 27 (Seniavin = Ponapé). _Calornis pacificus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 32 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 779 (Ponapé); _idem_ (part), Journ. f. Ornith., 1880, p. 289 (Ponapé); _idem_, (part), Proc. Zool. Soc. London, 1880, p. 576 (Ponapé). _Calornis pacifica_ Finsch, Ibis, 1881, p. 115 (Ponapé); _idem_, (part), Mitth. Ornith. Ver. Wien. 1884, p. 49 (Ponapé). _Aplonis kittlitzi_ Sharpe (part), Cat. Birds British Mus., 13, 1890, p. 136 (Ponapé); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 44 (Ponapé); Bolau (part), Mitteil. Naturhist. Mus. Hamburg, 1898, p. 62 (Ponapé); Nehrkorn, Kat. Eiers., 1899, p. 122 (Ponapé); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ponapé); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 55 (Ponapé). _Lamprocorax kittlitzi_ Dubois (part), Syn. Avium, 1, 1902, p. 542 (Ponapé). _Aplonis opaca_ Wetmore (part), in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 219 (Ponapé); Mayr. Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). A_plonis kittlitzi kittlitzi_ Momiyama (part), Tori, 2, 1920, p. 1 (Ponapé). _Aplonis opaca opaca_ Momiyama (part), Birds Micronesia, 1922, p. 12 (Ponapé); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 70 (Ponapé). _Aplonis opaca ponapensis_ Yamashina, Tori, 7, 1932, p. 394 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 170 (Ponapé). _Aplonis opaca ponapensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 188 (Ponapé). _Aplonis opacus ponapensis_ Mayr, Birds Southwest Pacific, 1945, p. 297 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: Resembles _A. o. opacus_, but larger with a longer bill and richer green luster on the back and breast. Immature: Resembles immature of _A. o. opacus_, but underparts more brightly streaked but still dingy in appearance. _Measurements._--Measurements are listed in table 45. _Specimens examined._--Total number, 47 (31 males, 16 females), as follows: Caroline Islands, USNM--Ponapé, 1 (Feb. 11); AMNH--Ponapé, 46 (Nov., Dec.). _Nesting._--Yamashina (1932a:394) reports the taking of an egg on August 2, 1931, and two eggs on August 30, 1931, at Ponapé. Coultas (field notes) writes that the nests of these birds are hidden in the tops of the tree-ferns and in holes in the trees. The natives told him that the starling lays two eggs. _Molt._--Most of the adult specimens taken by Coultas in November and December, 1931, are in molting plumage. _Remarks._--Coultas (field notes) writes that the starling is a common bird at Ponapé. He found it in flocks of from two to 12 or more birds. As at Kusaie he noted more birds in the immature plumage than in the adult plumage at Ponapé. The starling occurs in large numbers even though the people of the island hunt this bird persistently for part of their food supply. The Micronesian Starling at Palau has the longest wing of any of the subspecies of _Aplonis opacus_. It most closely resembles _A. o. opacus_; both of these subspecies have only a faint amount of bronzy-green luster of the feathers, and the immatures have dingy yellow streaks on the abdomen. =Aplonis opacus angus= Momiyama Micronesian Starling _Aplonis opaca anga_ Momiyama, Birds Micronesia, 1922, p. 6. (Type locality, Toroas, Ruk Island.) _Lamproth[ornis] opaca_ Kittlitz (part), Observ. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 297 (Lougounor = Lukunor). _Lamprotornis columbinus_ Bonaparte (part), Consp. Avium, 1, 1850, p. 417 (Carolinen = Lukunor?). _Lamprotornis columbina_ Hartlaub (part), Journ. f. Ornith., 1854, p. 168 (Carolinen = Lukunor?). _Calornis kittlitzi_ Hartlaub and Finsch (part), Proc. Zool. Soc. London, 1872, pp. 89, 100 (Mackenzie = Ulithi?); Finsch (part), Journ. Mus. Godeffroy, 8, 1875, p. 23 (Mackenzie = Ulithi?); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, pp. 298, 330, 353 (Mortlock, Nukuor, Ruk). _Calornis pacificus_ Finsch (part), Journ. Mus. Godeffroy, 8, 1875, p. 23 (Mackenzie = Ulithi?); _idem_ (part), Journ. f. Ornith., 1880, p. 290 (Ruck, Mortlocks); _idem_ (part), Proc. Zool. Soc. London, 1880, p. 576 (Ruk); _idem_ (part), Ibis, 1881, p. 111 (Ruk). _Calornis pacifica_ Finsch (part), Mitth. Ornith. Ver. Wien, 1884, p. 49 (Rukgruppe). _Aplonis kittlitzi_ Sharpe (part), Cat. Birds British Mus., 13, 1890, p. 136 (Ruk, Lugunor); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 44 (Ruk or Luganor, Nukuor); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 216 (Ruk, Nukuor, Luganor); Hartert (part), Novit. Zool., 5, 1898, p. 59 (Ruk, Luganor); _idem_, Novit. Zool., 7, 1900, p. 6 (Ruk); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ruck); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 55 (Ruk). _Lamprocorax kittlitzi_ Dubois (part), Syn. Avium, 1, 1902, p. 542 (Ruk, Luganor). _Aplonis opaca_ Wetmore (part), in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 219 (Truk). _Aplonis kittlitzi kittlitzi_ Momiyama (part), Tori, 2, 1920, p. 1 (Truk, Wolea). _Aplonis opaca anga_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 71 (?Luganor or Ruk, ?Nukuor, Wolea or Oleai); Takatsukasa and Yamashina, Tori, 32, 1930, p. 109 (Ruk); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 847 (Ruk); Hand-list Japanese Birds, rev., 1932, p. 170 (Uluthi, Feys, Wolea, Ifalik, Faraulep, Lamotrek, Truk, Nukuoro). _Aplornis apaca anga_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 458 (Truk?); Hand-list Japanese Birds, 3d ed., 1942, p. 188 (Uluthi, Feys, Wolea, Ifalik, Faraulep, Lamotrek, Truk, Nukuoro). _Aplonis opacus angus_ Mayr, Birds Southwest Pacific, 1945, p. 297 (Truk and western Carolines); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, pp. 70, 71 (Ulithi Truk). _Geographic range._--Micronesia: Caroline Islands--Ulithi, Fais, Wolea, Ifalik, Faraulep, Lamotrek, Truk, Nukuoro, Lukunor. _Characters._--Adult: Resembles _A. o. opacus_, but larger and with bill less deep and feathers with distinct greenish luster both on the upper parts and the lower parts. Female smaller. Immature: Resembles immature of _A. o. opacus_, but underparts streaked with brighter, buffy-yellow coloring. _Measurements._--Measurements are listed in table 45. _Specimens examined._--Total number, 38 (24 males, 14 females), as follows: Caroline Islands, USNM--Ulithi, 27 (Aug. 15, 16, 19, 20, 21, 22)--Truk, 2 (Feb. 16, Dec. 13); AMNH--Truk, 9 (Jan. 29, Feb. 1, 28, June 14, Oct. 9, 14). _Nesting._--Hartert (1900:6) reports that at Truk nests of the starling were obtained by Owston's Japanese collectors from May to July and one in March. Nests contained from one to three eggs each. _Molt._--Adult birds taken by the NAMRU2 party at Ulithi in August are in molting plumage. _Food habits._--The stomachs of starlings obtained in August at Ulithi contained pieces of fruit and seeds. Twelve stomachs contained between one and three cc. of these foods. Papaya and small berries were the foods most frequently observed in the stomachs. _Remarks._--The Micronesian Starling of the central and western Carolines is one of the few land birds which lives on both the "high" islands and the "low" coral islands in Micronesia. It is found on several of the coral atolls in the Carolines. In the Hand-list of Japanese Birds (Hachisuka _et al._, 1932:170), the birds at Ulithi and Fais are placed in the subspecies _A. o. angus_, although these islands are only a short distance from Yap, at which place another subspecies, _A. o. kurodai_, occurs. Specimens from Yap are not available for comparison. Specimens from Ulithi and from Truk closely resemble one another. The NAMRU2 party found the starling to be numerous at Truk and at Ulithi in 1945. At both places the natives make use of the birds as food. At Truk, McElroy found a larger number of birds in immature plumage than that of birds in adult plumage. Similar observations have been made at several other islands in Micronesia. At Ulithi, the NAMRU2 party found the starling at all islands in the atoll visited in 1945. The bird was more numerous at the islands of Potangeras and Mangejang, and less numerous at the island of Losiep; the former two islands were occupied--at the time of the visit in 1945--by service personnel and the vegetation was disturbed, whereas Losiep was uninhabited and rarely visited by people. I attribute the smaller population of starlings at Losiep to the fact that on this island the large monitor lizard, _Varanus indicus_, was numerous while at Potangeras and Mangejang it was apparently entirely absent. These large lizards depend principally on the birds, rodents, and insects for their food supply. At Potangeras the rat _Rattus exulans_ was exceedingly numerous, while at Losiep no sign of rodents was found nor were any taken in traps set during the daytime. =Aplonis opacus kurodai= Momiyama Micronesian Starling _Aplonis kittlitzi kurodai_ Momiyama, Tori, 2, 1920, p. 1. (Type locality, Yap.) _Calornis kittlitzi_ Hartlaub and Finsch (part), Proc. Zool. Soc. London, 1872, p. 100 (Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 123 (Yap); Finsch (part), Journ. Mus. Godeffroy, 8, 1875, pp. 5, 24 (Yap); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 298 (Yap). _Calornis pacificus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, p. 32 (Yap). _Aplonis kittlitzi_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 44 (Yap); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 216 (Yap); Hartert (part), Novit. Zool., 5, 1898, p. 58 (Yap); Bolau (part), Mitteil. Naturhist. Mus. Hamburg, 1898, p. 62 (Yap); Matschie (part), Journ. f. Ornith., 49, 1901, p. 112 (Yap); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Yap). _Aplonis opaca kurodai_ Momiyama, Birds Micronesia, 1922, p. 11 (Yap); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 71 (Yap); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 848 (Yap); Hand-list Japanese Birds, rev., 1932, p. 170 (Yap). _Aplonis opaca kurodai_ Takatsukasa and Yamashina, Dobutsu, Zasshi, 43, 1931, p. 458 (Yap?); Hand-list Japanese Birds, 3d ed., 1942, p. 188 (Yap). _Aplonis opacus kurodai_ Mayr, Birds Southwest Pacific, 1945, p. 297 (Yap); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 71 (Yap). _Geographic range._--Micronesia: Caroline Islands--Yap. _Characters._--Adult: According to Momiyama (1922:11), "Similar to _A. o. anga_ from Ruk group, but the bill thicker (9-10.5 mm.; that of the latter 8.5-9.5 mm.) and much longer (24-27.5 mm.; that of the latter 21.5-25 mm.) and the wing also longer in average (119.5-130 mm. instead of 116.5-129.5 mm.). It differs from typical _opaca_ by the edge of feathers of both body sides very distinctly tinged with a bronzy-green lustre, by the bill being longer and thicker (in typical _opaca_ exposed culmen 21.5-24.5 mm., depth of bill 9-9.5 mm.)." Immature: "Similar to the immature of the typical form, but both sides of body somewhat deeper in colour and the edge of feathers distinctly tinged with lustrous bronzy-green. It differs from the same stage of _A. o. anga_ by the under-parts being without pale-yellowish area." Momiyama (1922:11). Young: "Similar to the young of typical bird, but differs from it by the mantle being very faintly tinged with bronzy-green and by the under-parts being somewhat tinged with brown. In the same stage of the typical form, the under-parts are much more greyish-ashy in colour." Momiyama (1922:11). _Remarks._--No specimens have been examined. Momiyama (1920:1) regarded the birds at Yap and at Saipan as _A. o. kurodai_. Later (1922:10) he separated the birds at Saipan as _A. o. harterti_, remarking that the birds from Saipan differ "from _A. o. kurodai_ Momiyama from Yap islands, by the green lustre on both sides of body being less distinct and showing tendency to a purplish lustre, by the bill being decidedly shorter, and by the same thickness." Price (1936a:19) describes a method by which starlings and other birds are captured by the natives of Yap. The natives make slashes in the trunk of a breadfruit tree and allow the exuding juice to harden. This material is then chewed until soft and adhesive. It is then placed on a stick which has been secured directly under a papaya fruit. When the birds alight on this perch, they become stuck and are captured. =Aplonis opacus orii= (Takatsukasa and Yamashina) Micronesian Starling _Aplornis opaca orii_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 458. (Type locality, Coror, Pelew Islands.) _Calornis kittlitzii_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 7, 117, 118 (Pelew). _Calornis opaca_ Gray (part), Hand-list Birds, 2, 1870, p. 27 (Pelew). _Calornis kittlitzi_ Hartlaub and Finsch (part), Proc. Zool. Soc. London, 1872, p. 89 (Pelew); Finsch (part), Journ. Mus. Godeffroy, 8, 1875, pp. 5, 23 (Palau); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 298 (Palau). _Calornis kittlitzi_ Kubary, Journ. Mus. Godeffroy, 4, 1873, p. 225 (Palau-Inseln). _Calornis pacificus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 32 (Palau); _idem_ (part), Journ. f. Ornith., 1880, p. 289 (Palau); _idem_ (part), Proc. Zool. Soc. London, 1880, p. 576 (Palau); _idem_ (part). Ibis, 1881, p. 111 (Pelew). _Aplonis kittlitzi_ Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 44 (Pelew); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 212 (Palaos); Hartert (part), Novit. Zool., 5, 1898, p. 58 (Pelew); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Palau); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 55 (Pelew). _Aplonis opaca_ subsp nov.? Momiyama, Birds Micronesia, 1922, p. 13 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 72 (Pelew). _Aplornis opaca orii_ Hand-list Japanese Birds, 3d ed., 1942, p. 188 (Babelthuap, Koror, Peliliu, Anguar). _Aplonis opaca orii_ Hand-list Japanese Birds, rev., 1932, p. 169 (Palau); Yamashina, Tori, 10, 1940, p. 673 (Palau). _Aplonis opacus orii_ Mayr, Birds Southwest Pacific, 1945, p. 297 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 71 (Peleliu, Ngesebus, Garakayo). _Geographic range._--Micronesia: Palau Islands--Kayangel, Babelthuap, Koror, Garakayo, Ngesebus, Peleliu, Ngabad, Angaur. _Characters._--Adult: Resembles adult of _A. o. opacus_, but slightly larger with bill longer and shallower, and feathers with distinct greenish gloss both on the upper parts and the lower parts. Resembles _A. o. angus_ in the amount of greenish gloss on feathers, but bill shallower. Depth of bill of _A. o. opacus_ measures, on the average, 9.5 for males and 9.0 for females; of _A. o. angus_ 8.5 for both males and females; of _A. o. orii_ 7.5 for both males and females. Immature: Resembles immature of _A. o. angus_, but streaking on underparts duller. _Measurements._--Measurements are listed in table 45. _Specimens examined._--Total number, 40 (21 males, 19 females), as follows: Palau Islands, USNM--Koror, 3 (Nov. 6)--Garakayo, 2 (Sept. 19)--Ngesebus, 1 (Sept. 20)--Peleliu, 7 (Aug. 28, 29, 30, 31, Sept. 5); AMNH--exact locality not given, 27 (Oct., Nov., Dec.). _Molt._--Many of the specimens taken in August and September show evidence of molt; most of the specimens taken in October, November and December are not in molt. _Remarks._--The amount of greenish gloss on the feathers of _A. o. orii_ and _A. o. angus_ appears to be the same, but the streaked underparts of the immature of _A. o. orii_ are duller than those of the immature of _A. o. angus_. The shallower bill in the Palau starling is caused by the lower edge of the mandible being generally straighter than that in _A. o. angus_ and _A. o. opacus_. In comparing _A. o. orii_ with _A. o. kurodai_, Takatsukasa and Yamashina (1931a:458) state that "the greenish gloss is less pronounced and of a duller shade than that of _A. o. kurodai_ Momiyama." The starling is probably the most abundant land bird in the Palaus. It was found as singles or in small flocks at all islands visited by the NAMRU2 party in 1945. As at the other islands of Micronesia, the starling at Palau is noisy and conspicuous. It is a most inquisitive bird, often following the collector through the woodlands. Apparently the starling prefers the open woodlands and marginal areas to the thicker jungles; as a result of clearing operations during the war, the bird probably has increased. The starling is primarily a vegetarian; I found no animal matter in stomachs examined at Palau or at Ulithi or Guam. At Palau, as at other islands, more of the starlings seen were in immature plumage than in adult plumage. Coultas (field notes) found the birds to be abundant at Koror and highly prized as food by the natives and Japanese. He writes, "It is surprising what a fine wholesome meal certain people can get out of handful of rice and a starling's breast." =Aplonis opacus guami= Momiyama Micronesia Starling _Aplonis opaca guami_ Momiyama, Birds Micronesia, 1922, p. 9. (Type locality, Guam). _Turdus columbinus_ Lesson (part), Traité d'Ornith., 1831, p. 406 (Mariannes = Guam). _Lamproth[ornis] opaca_ Kittlitz (part), Kupfertaf. Naturgesch. Vögel, 2, 1833, p. 11, pl. 15, fig. 2 (Marianen = Guam); idem (part), Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, pp. 298, 304 (Guahan). _Lamprotornis columbinus_ Bonaparte (part), Consp. Avium, 1, 1850, p. 417 (Mariann. =Guam). _Lamprotornis columbina_ Hartlaub (part), Journ. f. Ornith., 1854, p. 167 (Mariannen =Guam); Kittlitz, Denkw. Reise russ. Amer. Micron, und Kamchat., 1, 1858, pp. 367, 376 (Guaham). _Calornis opaca_ Gray (part), Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 26 (Ladrone or Marian Is.); _idem_, (part), Hand-list Birds, 2, 1870, p. 27 (Ladrone = Guam?). _Calornis kittlitzi_ Finsch and Hartlaub (part), Fauna Centralpolynesiens, 1867, p. 109 (Marianen = Guam?); Oustalet, Le. Nat., 1889, p. 261 (Mariannes). _Calornis columbina_ Giebel (part), Thes. Ornith., 2, 1875, p. 427 (Marianae = Guam?). _Calornis pacificus_ Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 32 Marianne). _Aplonis kittlitzi_ Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 44 (Marianne; Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 212 (Guam, Saypan); Hartert (part), Novit. Zool., 5, 1898, p. 58 (Guam, Saipan); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 54 (Marianas); Matschie, Journ. f. Ornith., 1901, p. 112 (Guam); Safford, Osprey, 1902, p. 69 (Guam); _idem_, The Plant World, 7, 1904, p. 264 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Mearns, Proc. U. S. Nat. Mus., 36, 1909, p. 477 (Guam); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Marianas); Cox, Island of Guam, 1917, p. 21 (Guam); Bryan, Guam Rec, vol. 13, no. 2, 1936, p. 25 (Guam). _Aplonis opaca_ Wetmore (part), in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 219 (Guam). _Aplonis kittlitzi kurodai_ Momiyama, Tori, 2, 1920, p. (Saipan). _Aplonis opaca guami_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 71 (Guam); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 847 (Guam); Yamashina, Tori, 7, 1932, p. 394 (Saipan, Rota); Hand-list Japanese Birds, rev., 1932, p. 169 (Guam, Rota, Tinian, Saipan). _Aplonis opaca harterti_ Momiyama (part), Birds Micronesia, 1922, p. 10 (Type locality, Saipan); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 71 (Saipan); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 847 (Saipan). _Aplornis opaca harterti_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 487 (Saipan). _Aplornis opaca guami_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 221 (Tinian, Rota); Hand-list Japanese Birds, 3d ed., 1942, p. 188 (Saipan, Tinian, Rota, Guam). _Aplonis opacus guami_ Mayr, Birds Southwest Pacific, 1945, p. 297 (Guam, Rota, Tinian, Saipan); Watson, The Raven, 17, 1946, p. 41 (Guam); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 103 (Tinian); Stott, Auk, 1947, p. 527 (Saipan, Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 69 (Guam, Rota, Tinian, Saipan). _Aplonis opacus_ Wharton, Ecol. Monogr., 16, 1946, p. 174 (Guam); Strophlet, Auk, 1946, p. 540 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam, Rota, Tinian, Saipan. _Characters._--Adult: Resembles closely _A. o. angus_ in the amount of greenish gloss present on the body feathers, but with slightly shorter and deeper bill. Immature: Resembles the immature of _A. o. angus_ but streaks on underparts brighter and less-dingy yellow. _Measurements._--Measurements are listed in table 45. The writer (1948:69) has given average measurements for the length of wing of adult males from Guam as 127, from Rota as 122, from Tinian as 131, and from Saipan as 131; for depth of bill of adult males from Guam as 9.0, from Rota as 9.0, from Tinian as 9.5, and from Saipan as 10.0. _Weights._--The NAMRU2 party obtained weights of six adult males from Guam as 84-96 (87); of eight adult females from Guam as 78-108 (86); of two juvenal males from Guam as 88 and 90; of five juvenal females from Guam as 77-87 (80); of two adult males from Rota as 70 and 83; and of five juvenal males from Rota as 64-80 (76). _Specimens examined._--Total number, 95 (55 males, 37 females, 3 unsexed), as follows: Mariana Islands, USNM--Guam, 44 (Jan. 21, 22, Feb. 5, March 8, 13, April 12, May 18, 22, 24, 27, 29, 30, June 3, 4, 6, 14, 16, 18, July 6, 7, 14, 20, Aug. 24, Oct. 8, Nov. 19, 23)--Rota, 12 (Oct. 18, 19, 26, 27, Nov. 2)--Tinian, 4 (Oct. 12, 18); AMNH--Guam, 16 (Jan. 23, 24, 29, March 3, 12, 13, 24, May, Aug. 12, Nov. 23, 28, Dec. 26)--Tinian, 15 (Sept. 7, 8, 10, 11, 12)--Saipan, 4 (July 9, 17, Aug. 26, Sept. 2). _Nesting._--The NAMRU2 party found evidence of nesting by starlings at Guam as early as January 28, in 1945. On this date a bird was seen to carry food into a hollow tree at Oca Point. Signs of nesting activities were observed in the months that followed, the last record being obtained on June 11. Starlings nest in cavities in trees, in holes in rocky cliffs, and probably in the tops of coconut palms. On June 2 a nest was found by Muennink in a cavity of a banyan tree at Oca Point, Guam. The nest was approximately 12 feet from the ground and consisted of a flattened mass of green foliage at the bottom of the cavity. Two eggs found in the nest have been described by the author (1948:69) as "Niagara green" with scattered, irregular spots of color, near "russet," "Mars brown" and "pallid purple-drab," most abundant near the large ends. Measurements are 32.1 by 22.1 and 32.0 by 22.4. Yamashina (1932a:394) records two eggs taken at Saipan on April 14, 1931; two eggs taken at Rota on March 10, 1931; and one egg taken at Rota on March 11, 1931. Seale (1901:54) writes that the starling nests in a hole in the dead trunk of the coconut palm and may lay three or four eggs. Hartert (1898:59) reports that two eggs were taken at Guam on March 11. _Food habits._--Probably the chief food of the starling at Guam is the fruit and seeds of the papaya. This plant grows in most parts of the island, especially in the lowlands where land uses have disturbed the climax vegetation. Many of the garden plots lay fallow during the war and were allowed to grow up in thick stands of papaya. As a fruit began to ripen, the starlings would peck out one side of a ripe fruit, feeding on the tissues and the seeds. It was seldom that a fully ripe papaya fruit was found that had not been at least partly eaten by the starlings. Apparently the birds do not feed on the fruit before it is fully ripened. Seeds of other types of vegetation were also eaten by the birds. _Parasites._--Wharton (1946:174) records the chigger (Acarina), _Trombicula_ sp., from the starling at Guam. _Remarks._--According to Oustalet (1895:212), the starling was taken in the Marianas by the expedition in the "Uranie" in 1820 and by the expedition in the "Astrolabe" in 1829. Kittlitz, who visited Guam from March 1-20, 1828, also recorded the starling. It was not until 1922, however, that the starling in the Marianas was recognized as subspecifically distinct from the birds in the Carolines and Palaus. The Japanese ornithologists named the bird at Guam as _A. o. guami_ and the bird at Saipan as _A. o. harterti_, but later regarded these as a single subspecies _A. o. guami_. Momiyama (1920:2) had, previously to the naming of the new forms in the Marianas, considered the bird at Saipan as belonging to the same subspecies as that found at Yap. Among named kinds, _A. o. guami_ found at Guam, Rota, Tinian, and Saipan appears to be most closely related to _A. o. angus_. These two subspecies differ in that the streaking of the underparts in the immatures is brighter in _A. o. guami_ and duller in _A. o. angus_. The bird at Saipan has a longer wing and a deeper bill than the bird at Guam; however, birds at Tinian show intermediate measurements. At Guam, the starling is the most numerous land bird. The writer (1947b:124), in counting birds along the roadways of Guam, recorded the starling on all of the 125 counts and found the birds to include more than one-half (57.3 percent) of all the birds seen. Starlings may have increased during the years of the war, with the disruption of normal agricultural activities allowing the growth of papaya and other food plants in fallow areas; however, the use of the birds as food by the islanders probably increased during the war. As at other islands in Micronesia, the numbers of birds in immature plumage at Guam seemingly exceeds the number of birds in adult plumage. Animals which may prey on the starling at Guam include the feral house cat, _Rattus mindanensis_, _Corvus kubaryi_, and the large lizard _Varanus indicus_. The starling spends little time on the ground; it feeds principally in the trees, which might limit the amount of damage done to it by the feral house cats which are numerous on the island. The rat, _R. mindanensis_, is a semi-arboreal animal and may feed on eggs and young birds in nest cavities of trees or on cliffs. The crow, _C. kubaryi_, has a reputation for stealing chicken eggs from poultry yards and may prey on the eggs and young of the starling. The monitor lizard, _V. indicus_, is known to prey on the starling, as well as on the domestic chickens at farm houses. On January 31, 1945, one of these large lizards was seen descending a tree after robbing a nest of a starling; one of the starling's eggs was seen in the mouth of the lizard. The noise and commotion set up by the parent birds and by other starlings, which had been attracted to the area, did not appear to perturb the uninvited guest. Downs (1946:103) writes that the starling at Tinian is less common than the white-eye, _Zosterops conspicillata saypani_. Gleize (1945:220) estimated the population of starlings on Tinian at 200. Coultas (field notes) found the starling abundant at Tinian in 1931, but he did not find the bird at Saipan. According to Stott (1947:527), the starling was abundant at Guam but "appeared to be common only locally on Saipan." He saw large flocks at the Marpi Point and Kingman Point areas on Saipan but found the bird less numerous elsewhere on the island. At Rota, the NAMRU2 party found the birds to be numerous and widely distributed over the island in 1945. At Guam, the present writer observed behavior of the starling on January 31, 1945, which may have been a courtship ceremony. Two adults were perched on a palm frond approximately 20 feet above the ground. The bird which was perched more distally on the frond opened its tail fan-fashion, spread its wings and at irregular intervals picked up in its beak a part of the frond and then released it. As this behavior was taking place, the birds would call in a sweet ascending song, which reminded me very much of the song of the redwing blackbird of North America. This was indeed a contrast to the usual squawking notes of this subspecies. =Aplonis opacus aeneus= (Takatsukasa and Yamashina) Micronesian Starling _Aplornis opaca aenea_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 487. (Type locality, Pagan.) _Aplonis kittlitzi_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 212 (Pagan, Agrigan). _Aplonis opaca harterti_ Momiyama (part), Birds Micronesia, 1922, p. 11 (Pagan, Agrigan); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 71 (Pagan, Agrigan). _Aplornis opaca aenea_ Hand-list Japanese Birds, 3d ed., 1942, p. 187 (Asongsong = Asuncion, Agrigan, Pagan, Almagan). _Aplornis opaca aenea_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 44, 1932, p. 221 (Pagan, Almagan). _Aplonis opaca aenea_ Hand-list Japanese Birds, rev., 1932, p. 169 (Agrigan, Pagan, Almagan); Yamashina, Tori, 10, 1940, p. 673 (Asongsong). _Aplonis opacus aeneus_ Mayr, Birds Southwest Pacific, 1945, p. 297 (Agrigan, Pagan, Almagan); Borror, Auk, 64, 1947, p. 417 (Agrihan). _Geographic range._--Micronesia: Mariana Islands--Alamagan, Pagan, Agrihan, Asuncion. _Characters._--Adult: According to Takatsukasa and Yamashina (1931:487), _A. o. aeneus_ resembles _A. o. orii_ of Palau, but has a bronze rather than green luster. _A. o. aeneus_ resembles _A. o. opacus_, but has a smaller bill. _Remarks._--No specimens of this subspecies have been examined by me. Little information is available regarding the occurrence of this subspecies in the northern Marianas. Oustalet (1895:212) writes that Marche collected four specimens at Pagan and three at Agrihan. Borror (1947:417) writes that in 1945, it was a "common and abundant species" at Agrihan. He obtained one specimen between July 27 and August 14 and comments that it had a grasshopper in its stomach. _Evolutionary history of Aplonis opacus._--_Aplonis opacus_ is known from the Mariana, Palau, and Caroline islands in Micronesia. It consists of several subspecies, which have relatively few distinguishing characteristics. No starlings are known in the Marshall and Gilbert islands, although atolls occur in these island-chains that offer a habitat approximately the same as those in the western Carolines now occupied by _A. o. angus_. In regard to parental stock, Sharpe (1876:47) considered _A. opacus_ as "nothing but a slightly more metallic race of _C. mysolensis_, with a still stouter bill." The species with which Sharpe compared _A. opacus_ is known from Mysol, Buru, and Ceram. Oustalet (1896:70) thought that the _Aplonis_ in Micronesia belonged to a group of starlings whose members are scattered through the Pacific islands including Cook, Samoa, Tonga, Fiji, New Britain, New Guinea, Banta, Mysol, Salwatti, and Timor. Mayr (1941b:204) is of the opinion that _Aplonis_ in Micronesia was derived from central Polynesia. Amadon (1943:8), in his study of the genera of starlings, places _A. opacus_ within a superspecies containing _A. cinerascens_, _A. tabuensis_, _A. fuscus_, and possibly _A. feadensis_ and _A. cantoroides_. All of these are blackish birds with greenish gloss with immatures having the underparts streaked. In comparing _A. opacus_ with these mentioned species and with other species of _Aplonis_, I find that _A. opacus_ more closely resembles _A. feadensis_ and _A. cantoroides_ than any others. Although there are differences in size of the bill, wing, and tail, these structures are proportionally the same. The streaked underparts of the immatures of _A. cantoroides_ are much like that of the immatures of _A. opacus_, whereas the immatures of _A. feadensis_ are only faintly streaked with whitish below. The eye of _A. cantoroides_ is red, and that of _A. opacus_ is more nearly yellow. The ancestral stock from which _A. opacus_ developed in Micronesia seemingly reached the area from Melanesia. In Micronesia the birds dispersed to various groups of islands from some point in the Caroline Islands. The birds are absent from the Marshall Islands. Perhaps the birds never reached the Marshall Islands or they may have been present in former times and disappeared since then. =Aplonis pelzelni= Finsch Ponapé Mountain Starling _Aplonis pelzelni_ Finsch, Proc. Zool. Soc. London, 1875 (1876), p. 644. (Type locality, Ponapé.) _Aplonis pelzelni_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 17, 32, pl. 2, fig. 3 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 779 (Ponapé); _idem_, Journ, f. Ornith., 1880, p. 290 (Ponapé); _idem_, Ibis, 1881, pp. 110, 112, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Sharpe, Cat. Birds British Mus., 13, 1890, p. 136 (Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 43 (Ponapé); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 215 (Ponapé); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 62 (Ponapé); Matschie, Journ. f. Ornith., 1901, pp. 111, 112 (Ponapé); Dubois, Syn. Avium, 1, 1902, p. 542 (Ponapé); Reichenow, Die Vögel, 2, 1914, p. 355 (Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 70 (Ponapé); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 849 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 170 (Ponapé); Bequaert, Mushi, 12, 1939, p. 82 (Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, pp. 204, 213 (Ponapé); Bequaert, Occ. Papers Bernice P. Bishop Mus., 16, 1941, p. 290 (Ponapé); Mayr. Birds Southwest Pacific, 1945, p. 298 (Ponapé). _Aplornis pelzelni_ Hand-List Japanese Birds, 3d ed., 1942, p. 189 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: A small, dark starling with upper parts sooty-brown, darker on head with forehead and lores blackish; wings, rump, upper tail-coverts, and tail lighter and more brownish than head; underparts paler and washed with olive-brown; bill and feet black; iris brown. Immature: Resembles adult, but lighter brown, especially the underparts. _A. pelzelni_ differs from _A. opacus_ by having no gloss on the feathers, smaller size, more slender bill, and a brown iris. _Measurements._--Measurements are listed in table 46. _Specimens examined._--Total number, 59 (32 males, 24 females, 3 unsexed), from Caroline Islands, AMNH--Ponapé (Dec). _Nesting._--Coultas (field notes) obtained reports that the Ponapé Mountain Starling nests in cavities in trees and lays two eggs. TABLE 46. MEASUREMENTS OF _Aplonis pelzelni_ ==================+=========+=======+===========+==========+======== | | | | Depth of | NUMBER AND SEX | Wing | Tail | Exposed | bill at | Tarsus | | | culmen | nostril | ------------------+---------+-------+-----------+----------+-------- 10 adult males | 103 | 65 | 20.0 | 6.5 | 27 | 101-105 | 63-67 | 19.0-21.0 | 6.0-7.0 | 26-28 | | | | | 10 adult females | 99 | 61 | 19.5 | 6.0 | 27 | 97-102 | 57-64 | 19.5-20.5 | 6.0-6.5 | 26-27 ------------------+---------+-------+-----------+----------+-------- _Parasites._--Bequaert (1939:82 and 1941:290) records the fly (Hippoboscidae), _Ornithoica pusilla_, from _A. pelzelni_. _Remarks._--Coultas (field notes) writes that "the Mountain Starling is a bird of the true mountain forest.... I did not record it below 1,400 feet. Natives tell me that the Mountain Starling formerly covered the whole of the island and that now some individuals can be found on the low atoll of Ant, to the westward of Ponapé. Unfortunately, I was not permitted to visit either Ant or Pakin." Coultas notes also that the birds are quiet and usually travel in pairs. They are easily attracted by squeaking the lips against the hand or by the cries of a wounded bird. Many of these starlings were taken in fruit trees. Coultas describes the call of _A. pelzelni_ as "weaker and finer" than that of _A. opacus_. These two species may be found together, according to Coultas, but _A. opacus_ is apparently the more aggressive and often drives _A. pelzelni_ away. Richards (_in litt._) found this bird to be "very rare" while on his visit to Ponapé in 1947-1948. He observed two individuals on January 15, 1948, at an elevation of approximately 600 or 700 feet. A male was taken. _Evolutionary history of Aplonis pelzelni._--The Ponapé Mountain Starling is a distinctive bird which evidently represents an ancient and single colonization of Micronesia. It lacks the green gloss which is found on many of the other starlings of the Pacific region. It has a brown iris, and the immatures lack the streaked underparts which are characteristic of _A. opacus_ and other species. The structure of its wing resembles that of _A. opacus_, but the primaries are more rounded. It is apparently better adapted to forested uplands, whereas _A. opacus_ and its relatives, _A. cantoroides_ and _A. feadensis_, appear to prefer lowland forests and coconut plantations. In habits and habitat preference, _A. pelzelni_ seems to resemble _A. santovestris_, which is restricted to mountain environment on Espiritu Santo in the New Hebrides. The describers of this starling, Harrisson and Marshall (1937:149), write that "_Aplonis santovestris_ apparently most closely resembles _A. pelzelni_ from Ponapé, especially in bill and tarsus." According to the description, _A. santovestris_ is approximately the size of _A. pelzelni_ with brownish coloring, crown dark brown, lower back and rump dark rufous, wing and tail blackish-brown, underparts rufous-brown, and iris grayish-green. These two birds are separated geographically and apparently exhibit evidences of parallel development. Possibly they came from a common ancestral stock. Mayr (1941b:204) writes that _A. pelzelni_ belongs with the starlings of the Polynesian area. I have compared _A. pelzelni_ with other starlings of the Southwest Pacific, including _A._ _feadensis_, _A. cantoroides_, and _A. zealandicus_, but see no close resemblances. =Aplonis corvinus= (Kittlitz) Kusaie Mountain Starling _Lamprothornis corvina_ Kittlitz, Kupfertaf. Naturgesch. Vögel, 2, 1833, p. 12, pl. 15, fig. 3. (Type locality, Ualan = Kusaie.) _Lamprothornis corvina_, Kittlitz, Mem. Acad. Imp. Sci. St. Peterbourg, 2, 1835, p. 7, pl. 9 (Ualan); _idem_, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 285 (Ualan). _Lamprotornis corvina_ Bonaparte, Consp. Avium, 1, 1850, p. 417 (Ualan); Hartlaub, Archiv. f. Naturgesch., 18, 1852, p. 133 (Ualan); Kittlitz, Denkw. Reise russ. Amer. Micron. und Kamchat., 2, 1858, pp. 25, 43, 59, 103 (Ualan); Finsch, Ibis, 1881, p. 104 (Kuschai). _Lamprocorax corvinus_ Hartlaub, Journ. f. Ornith., 1854, p. 168 (Carolinen = Kusaie); Sclater, Ibis, 1859, p. 327 (Caroline = Kusaie); Dubois, Syn. Avium, 1, 1902, p. 543 (Kuschai). _Calornis (Lamprocorax?) corvina_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 25 (Oualan). _Sturnoides corvina_ Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 108 (Ualan); Finsch, Journ. f. Ornith., 1880, pp. 297, 302 (Kuschai). _Calornis corvina_ Gray, Hand-list Birds, 2, 1870, p. 27 (Caroline = Kusaie); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 100 (Ualan); Giebel, Thes. Ornith., 2, 1875, p. 427 (Caroline = Kusaie); Sharpe, Cat. Birds British Mus., 13, 1890, p. 137 (Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 46 (Ualan or Kushai); Matschie, Journ. f. Ornith., 1901, p. 112 (Ualan); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Kusaie). _Sturnoides corvinus_ Finsch, Ibis, 1881, pp. 107, 108 (Kushai). _Kittlitzia corvina_ Hartert, Kat. Vogelsamml. Senckenb., 1891, p. 75 (Ualan); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 72 (Kusaie); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 853 (Kusaie); Hand-list Japanese Birds, rev., 1932, p. 169 (Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 187 (Kusaie). _Aplonis corvina_ Reichenow, Die Vögel, 2, 1914, p. 356 (Ualan); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 213 (Kusaie). _Aplonis corvinus_ Mayr, Birds Southwest Pacific, 1945, p. 298 (Kusaie). _Geographic range._--Micronesia: Caroline Islands--Kusaie, probably extinct for many years. _Characters._--According to Sharpe (1890:137), "Shining black; each feather with a glossy margin, varying from steel-green to purplish red; bill and feet black (Kittlitz)." _Remarks._--Kittlitz obtained two specimens of a unique starling at Kusaie when he visited the island in December and January, 1827-'28. He named the birds as new and deposited the specimens in the museum in St. Petersburg. The bird has not been found at Kusaie since that time. Sharpe (1890:137-138, footnote) writes "This species I have never seen, and Dr. Finsch did not meet with it during his visit to Kuschai. He writes to me:--'It no doubt exists on Kuschai, just as it did when Kittlitz visited the island. Nobody has reached the mountains in the interior since Kittlitz's time; and it is strictly a mountain bird.'" Coultas spent considerable time searching the higher areas of Kusaie for the bird in 1931. The Kusaie Mountain Starling apparently represents an early invasion of Micronesia, independent of that of any other starling in the area and perhaps the earliest of the three colonizations by starlings in Micronesia. The drawing of the bird as pictured by Kittlitz (1833:pl. 14, fig. 3) shows the long bill to be one of its distinctive characters. This suggests relationship to _A. atrifuscus_ of Samoa, as noted by Mayr (1942a:6). _A. atrifuscus_ is larger than _A. opacus_ with a longer bill and gloss on some of the feathering of the body; it looks a good deal like the drawing of _A. corvinus_ by Kittlitz. _A. corvinus_ may also have some relation to _A. magnus_ of Biak, although this species has a longer tail and a shorter bill. _A. corvinus_ probably has undergone an evolutionary development which parallels that of _A. atrifuscus_ and possibly other species in the Polynesian and Melanesian areas. The ancestral stock from which _A. corvinus_ was derived may have been close to _A. grandis_, which is found in the Solomon area. _A. grandis_ is a forest bird, somewhat solitary in habits. =Sturnus philippensis= (Forster) Violet-backed Starling [_Motacilla_] _philippensis_ Forster, Ind. Zool., 1781, p. 41. (Type locality, Philippines.) _Sturnus philippensis_ Mayr, Birds Southwest Pacific, 1945, p. 302 (Palau). _Geographic range._--Breeds in Japan. Winters to the Philippine Islands. In Micronesia: Palau Islands--exact locality unknown. _Remarks._--Mayr (1945a:302) records this starling as a migrant visitor to the Palau Islands. Coultas obtained an immature female of this species at Palau on October 13, 1931. =Sturnus cineraceus= Temminck Ashy Starling _Sturnus cineraceus_ Temminck, Pl. Col. 2, 1832, pl. 556. (Type locality, Japan.) _Spodiopsar cineracea_ Kishida, Lansania, 1, 1929, p. 17 (Saipan); Hand-list Japanese Birds, 3d ed., 1942, p. 187 (Saipan). _Geographic range._--Breeds in eastern Asia and Japan. Winters in southern China and Philippines. In Micronesia: Mariana Islands--Saipan. _Remarks._--The Ashy Starling has been reported from Saipan by Kishida. It probably is a casual winter migrant. =Cleptornis marchei= (Oustalet) Golden Honey-eater _Ptilotis Marchei_ Oustalet, Le Nat., 1889, p. 260. (Type locality, Saypan.) _Cleptornis marchei_ Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 35 (Saypan); Hartert, Novit. Zool., 5, 1898, p. 56 (Saipan); Matschie, Journ. f. Ornith., 1901, p. 112 (Saipan); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 60 (Saipan); Dubois, Syn. Avium, 1, 1902, p. 722 (Marianne = Saipan); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Marianne = Saipan); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 75 (Saipan); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 788 (Saipan); Hand-list Japanese Birds, rev., 1932, p. 171 (Saipan); Hand-list Japanese Birds, 3d ed., 1942, p. 190 (Saipan); Mayr, Birds Southwest Pacific, 1945, p. 298 (Saipan); Stott, Auk, 64, 1947, p. 527 (Saipan). /# _Ptilotis (Cleptornis) marchei_ Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 202 (Saypan). #/ _Geographic range._--Micronesia: Mariana Islands--Saipan. _Characters._--Adult: A small honey-eater with head, rump, and underparts near "light cadmium" becoming lighter on the chin and darker on the nape; back near "orange-citrine"; wings and tail feathers brown with outer edges colored like back and inner edges whitish; orbital ring pale yellow; breast, belly, sides, and under tail- and upper tail-coverts near "raw sienna"; under wing-coverts pale yellow; axillaries yellow; bill and feet light yellow-brown, maxilla darker; iris chestnut-brown. Immature has lighter bill. _Measurements._--Measurements are listed in table 47. TABLE 47. MEASUREMENTS OF _Cleptornis marchei_ ==================+=========+=========+=============+========= NUMBER AND SEX | Wing | Tail | Full culmen | Tarsus ------------------+---------+---------+-------------+--------- 7 adult males | 79 | 64 | 19.5 | 26 | (77-80) | (61-66) | (19.0-20.0) | (25-27) | | | | 5 adult females | 73 | 58 | 18.0 | 24 | (72-75) | (56-59) | (17.5-18.5) | (23-25) ------------------+---------+---------+-------------+--------- _Specimens examined._--Total number, 17 (9 males, 8 females), as follows: Mariana Islands, USNM--Saipan, 4 (July 11, Dec. 15); AMNH--Saipan, 13 (July 8, Aug. 1, 10, 13, 14, 21, 30, Sept. 3, 7, 9, 15). _Nesting._--Hartert (1898:56) reports that one nest of the Golden Honey-eater was found on July 7. It was hung from a fork of a branch, "like the nest of a golden Oriole." He writes that four other nests were obtained in late August. Hartert describes the egg as "pale blue without gloss, spotted over and over with rufous, more so on the thicker end, and measures about 20:15 mm." _Molt._--Specimens taken in July, August, and September are molting. _Remarks._--Oustalet (1895:202) writes that Marche obtained 25 specimens of the Golden Honey-eater at Saipan in May, June, and July, 1887. Little is known regarding its habits; Moran (1946:262) writes that the bird "reminds one of the prothonotary warbler, with a long, curved, black bill." Stott (1947:527) writes that "it appears to be restricted to a single habitat, that of dense forest." He found the bird in forest on the north shore of Magicienne Bay. Coultas obtained only one specimen on his visit to Saipan in 1931. Marshall (1949:216) records some interesting observations of this bird made in 1945. He notes (_op. cit._ p. 219) that the bird breeds in January, February and April. Not only is it remarkable that the Golden Honey-eater has become established on a single island in a rather closely associated chain of islands, but it is also difficult to determine from where the bird came. It seemingly has no close relatives in the Micronesian area. Oustalet (1895:202) points out that one has to go to New Guinea, Moluccas, Australia, Fiji, Samoa, and Tonga in order to find related forms. In looking through the large collections of Meliphagidae in the American Museum of Natural History, I found only a few genera to which the Saipan Golden Honey-eater seems to be closely related. _Timeliopsis_ of New Guinea has some resemblances to _Cleptornis_, although the coloration is different. _Timeliopsis_ has a similar bill, but has a longer tail and longer wing; the shortness of the wing in _Cleptornis_ is not unusual since other insular forms also exhibit this characteristic. Perhaps _Cleptornis_ is closer to the genus _Meliphaga_ of New Guinea and Australia, which has become differentiated into a number of diverse species and subspecies. _Cleptornis_ compares rather favorably with _M. pencillata carteri_ of Australia, but differs by the softness of its feathers and the shorter wing and shorter tail. It shows also some affinities with _M. flava_ of Australia, particularly in shape of bill; the coloration of the feathers is light olive-green in _M. flava_. The bird at Saipan seemingly has no relationships with the Hawaiian honey-eaters. =Myzomela cardinalis rubratra= (Lesson) Cardinal Honey-eater _Cinnyris rubrater_ Lesson, Dict. Sci. Nat., éd. Levrault, 50, 1827, p. 30. (Type locality, Oualan = Kusaie.) _Cinnyris rubrater_ Lesson (part), Voy. "La Coquille," Zool., 2, 1828, pp. 433, 678 (Oualan); _idem_ (part), Man. d'Ornith., 2, 1828, p. 55 (Oualan); _idem_ (part), Traité d'Ornith., 1831, p. 299 (Oualan); Kittlitz (part), Kupfertaf. Naturgesch. Vögel, 1832, p. 6, pl. 8, fig. 1 (Ualan); _idem_ (part), Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, pp. 364, 381; 2, 1858, pp. 39, 49 (Ualan). _Certhia Cardinalis_ Kittlitz, Mém. Acad. Imp. Sci. St. Pétersbourg, 2, 1835, p. 4 (Ualan). _Cinnyris cardinalis_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 285 (Ualan). _Myzomela sanguinolenta_ Bonaparte, Consp. Avium, 1, 1850, p. 394 (no loc. = Kusaie?). _Myzomela rubrater_ Hartlaub (part), Archiv. f. Naturgesch., 18, 1852, pp. 109, 131 (Ualan); Finsch and Hartlaub, Fauna Centralpolynesiens, 1867, p. 57 (Ualan). _Myzomela rubratra_ Hartlaub (part), Journ. f. Ornith., 1854, p. 168 (Carolinen = Kusaie); _idem_ (part), Proc. Zool. Soc. London, 1867 (1868), p. 829 (Carolines = Kusaie); Hartlaub and Finsch (part), Proc. Zool. Soc. London, 1872, p. 95 (Ualan); Giebel (part), Thes. Ornith., 2, 1875, p. 681 (Carolinae = Kusaie); Finsch (part), Journ. Mus. Godeffroy, 12, 1876, p. 26 (Ualan); Forbes (part), Proc. Zool. Soc. London, 1879, p. 271 (Ualan); Finsch (part), Journ. f. Ornith., 1880, pp. 285, 298 (Kuschai); _idem_ (part), Ibis, 1881, pp. 103, 108, 111 (Kuschai); _idem_ (part), Mitth. Ornith. Ver. Wien, 1884, p. 48 (Ualan); Hartert, Kat. Vogelsamml. Senckenb., 1891, p. 31 (Ualan); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 31 (Ualan); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, pp. 201, 202 (Kushai); Hartert (part), Novit, Zool., 5, 1898, p. 56 (Ualan); Dubois (part), Syn. Avium, 1, 1902, p. 716 (Carolines = Kusaie). _Certhia sanguinolenta_ Kittlitz, Denkw. Reise russ. Amer. Micron, und Kamchat., 1, 1858, p. 364 (Ualan). _Myzomela major_ Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 11 (Oualan?). _Myzomela rubrata_ Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ualan). _Myzomela rubratra rubratra_ Wetmore, Proc. Biol. Soc. Washington, 30, 1917, p. 117 (Kusaie); Wetmore (part), in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 219 (Kusaie); Momiyama, Birds Micronesia, 1922, pp. 15, 20, 21, 22, (Kusaie); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 72 (Kusaie); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 743 (Oualan); Hand-list Japanese Birds (part), rev., 1932, p. 172 (Kusaie); Hand-list Japanese Birds (part), 3d ed., 1942, p. 191 (Kusaie). _Myzomela cardinalis rubratra_ Mayr, Birds Southwest Pacific, 1945, p. 299 (Kusaie). _Geographic range._--Micronesia: Caroline Islands--Kusaie. _Characters._--Adult male: Head (except lores), neck back, rump, upper tail-coverts, chin, throat, breast, and upper abdomen black with feathers tipped with coloring between "scarlet" and "scarlet-red"; rest of feathering black; bill long and curved and black; feet black; iris dark brown. TABLE 48. MEASUREMENTS OF _Myzomela cardinalis_ OF MICRONESIA ===================+============+=========+=========+=============+========= | Number | | | | SUBSPECIES | and sex | Wing | Tail | Full culmen | Tarsus -------------------+------------+---------+---------+-------------+--------- _M. c. rubratra_ | 21 adult | 79 | 55 | 19.5 | 22 | males | (76-81) | (53-56) | (18.5-20.5) | (21-22) | | | | | | 20 adult | 71 | 49 | 18.5 | 20 | females | (69-74) | (45-51) | (17.5-19.5) | (19-21) | | | | | _M. c. dichromata_ | 24 adult | 78 | 53 | 21.5 | 22 | males | (76-80) | (51-56) | (20.0-23.0) | (21-23) | | | | | | 22 adult | 69 | 47 | 19.0 | 20 | females | (66-72) | (45-49) | (17.5-20.5) | (19-21) | | | | | _M.c. major_ | 9 adult | 77 | 55 | 20.0 | 22 | males | (75-78) | (54-59) | (19.5-20.5) | (21-22) | | | | | | 2 adult | 70 | 50 | 19.0, 20.5 | 21.5 | females | | | | | | | | | _M. c. saffordi_ | 47 adult | 73 | 55 | 20.0 | 22 | males | (69-77) | (51-56) | (19.0-20.5) | (21-24) | | | | | | 14 adult | 65 | 49 | 18.5 | 21 | females | (63-71) | (46-51) | (17.5-19.5) | (19-21) | | | | | _M. c. kurodai_ | 2 adult | 74, 75 | 52 | 20.0, 20.5 | 20, 21 | males | | | | | | | | | _M. c. kobayashii_ | 17 adult | 74 | 54 | 20.5 | 21 | males | (71-76) | (51-57) | (19.0-22.0) | (20-22) | | | | | | 8 adult | 67 | 48 | 18.0 | 20 | females | (65-68) | (45-50) | (17.5-19.0) | (19-21) -------------------+------------+---------+---------+-------------+--------- Adult female: Resembles adult male, but smaller; red coloring duller; wings and tail more brownish and less blackish; abdomen and under tailcoverts dark gray. Immature: Resembles adult, but duller and less blackish and more grayish with less red coloring on feathers and an olivaceous-brown tinge to plumage. _Measurements._--Measurements are listed in table 48. _Specimens examined._--Total number, 62 (35 males, 27 females), as follows: Caroline Islands, USNM--Kusaie, 3 (Feb. 9); AMNH--Kusaie, 59 (Jan., Feb., March). _Nesting._--Finsch records the taking of eggs of the honey-eater at Kusaie on February 26 and March 10, 1880. _Molt._--Evidence of molt was observed in a few specimens taken in January and in larger number of birds taken in March. In addition, some skins obtained in March showed fresh plumage. Although there is little evidence available, I suppose that nesting activities of _M. r. rubratra_ at Kusaie occur in the winter months of December, January, February, and March, and that molt begins in January, especially in the males, and possibly reaches a peak in March. _Remarks._--_M. r. rubratra_ was first described by Lesson, who referred to it under the name _Cinnyris rubrater_. The bird was found by Lesson at Kusaie, when he visited the island in June, 1924, as a member of the expedition from the ship "La Coquille." In his description he also stated that the bird was found in the Philippines by Dussumier. The report of the bird's occurrence in the Philippines proved to be erroneous, as was pointed out by Wetmore (in Townsend and Wetmore, 1919:220). Oustalet (1895:200) contended that Lesson's description was based on the specimens taken by Quoy and Gaimard in the Marianas; he stated that none of the birds which Lesson mentions from Kusaie was preserved. Bonaparte also considered _Cinnyris rubrater_ to be from the Marianas, and he gave the name _Myzomela major_ to the honey-eater of the Caroline Islands (apparently including Kusaie) on the basis of specimens taken by Hombron and Jacquinot at Truk. Wetmore (in Townsend and Wetmore, 1919:220) settles the argument and assigns Lesson's name _rubratra_ to the honey-eater at Kusaie; apparently this treatment is the correct one inasmuch as Lesson used his own field notes and records of the occurrence of this honey-eater at Kusaie in preparing his description, even if the actual specimens were not preserved. This arrangement makes Bonaparte's name _major_ available for the population at Truk and makes Wetmore's name _saffordi_ available for the population in the Marianas. The placing of the honey-eaters of Micronesia within the species _Myzomela cardinalis_ by Mayr (1932:19) is, I think, justified. Little information is available concerning the habits of the honeyeater at Kusaie. In 1931, Coultas (field notes) regarded the bird as common in the lowlands, especially in the coconut groves. He did not find the bird at high elevations on the island. =Myzomela cardinalis dichromata= Wetmore Cardinal Honey-eater _Myzomela rubratra dichromata_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 220. (Type locality, Ponapé.) _Myzomela rubratra_ Pelzeln, Reise "Novara," Vögel, 1865, pp. 55, 162 (Puynipet = Ponapé); Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 26 (Ponapé); _idem_, Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); Forbes (part), Proc. Zool., Soc. London, 1879, p. 271 (Ponapé); Finsch (part), Journ. f. Ornith., 1880, p. 285 (Ponapé); _idem_ (part), Proc. Zool. Soc. London, 1880, p. 575 (Ponapé); _idem_ (part), Ibis, 1881, pp. 111, 115 (Ponapé); _idem_ (part), Mitth. Ornith. Ver. Wien, 1884, p. 48 (Ponapé); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 31 (Ponapé); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 202 (Ponapi). _Myzomela rubrata_ Nehrkorn (part), Journ. f. Ornith., 1879, p. 397 (Ponapé); Christian, The Caroline Islands, 1899, p. 358 (Ponapé); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ponapé); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 55 Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). _Myzomela chermesina_ Gadow, Cat. Birds British Mus., 9, 1884, p. 137 (Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Ponapé). _Myzomela rubratra dichromata_ Momiyama, Birds Micronesia, 1922, pp. 15, 20, 21, 22 (Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 73 (Ponapé); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 743 (Ponapé). _Myzomela rubratra rubratra_ Yamashina, Tori, 7, 1932, p. 395 (Ponapé); Hand-list Japanese Birds (part), rev., 1932, p. 172 (Ponapé); Hand-list Japanese Birds (part), 3d ed., 1942, p. 191 (Ponapé). _Myzomela cardinalis dichromata_ Mayr, Birds Southwest Pacific, 1945, p. 299 Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult male: Resembles adult males of _M. c. rubratra_, but with more extensive black markings on lores and below eye; tips of feathers lighter "scarlet." Adult female: Resembles adult female of _M. c. rubratra_, but duller and with red coloring much reduced; head, neck, shoulder, ear-coverts, and sides of neck sooty brownish-gray; rest of upper parts dark brownish-gray with plumage of middle of back, rump, and upper tail-coverts tipped with scarlet; wings and tail dark brown with outer edges olivaceous-gray; chin and throat reddish; breast light brownish-gray, may be washed with reddish; axillaries, abdomen, and under tail-coverts grayish. Immature male: Resembles adult male, but scarlet coloring less brilliant and thinner on forehead, middle of back, rump, upper tail-coverts, and underparts and absent, or nearly absent, on crown and neck. Immature female: Resembles adult female, but scarlet coloring thinner and present only on underparts, back, rump, and upper tail-coverts; abdomen and under tail-coverts washed with buff. _Measurements._--Measurements are listed in table 48. _Specimens examined._--Total number, 52 (26 males, 24 females, 2 unsexed), as follows: Caroline Islands, USNM--Ponapé, 3 (Feb. 11, 12); AMNH--Ponapé, 49 (Nov., Dec.). _Nesting._--Yamashina (1932a:395) records a large collection of eggs of the honey-eater, taken at Ponapé in 1931. Of 13 sets of eggs listed, 10 include two eggs per set and 3 include one egg per set. These were obtained from July 20 to September 2. Coultas (field notes) found one nest with young in a tree-fern in the period of November and December, 1930. The nest was cup-shaped and made of fern and fine grasses and lined with lichens. Coultas writes that only the female feeds the young. He suspects that the honey-eater nests at all times of the year. _Molt._--Most of the birds taken by Coultas in November and December are in molting plumage. _Remarks._--The Cardinal Honey-eater at Ponapé is, according to Coultas, found in most habitats of the island. He found it to be an aggressive bird, often chasing the white-eye _Zosterops cinerea_. The committee (Hachisuka _et al._) which prepared the Hand-list of Japanese Birds in both the revised edition (1932) and the third edition (1942) does not recognize the Ponapé honey-eater as separable from the bird at Kusaie. I see no reason for this action and find the bird at Ponapé to be a well-marked subspecies. =Myzomela cardinalis major= Bonaparte Cardinal Honey-eater _Myzomela major_ Bonaparte, Comptes Rendus Acad. Sci. Paris, 38, 1854, p. 264. (Type locality, "ex Ins. Carolinis ab Homb. et Jacq." = Truk.) _Myzomela major_ Gray, Hand-list Birds, 1, 1869, p. 153 (Caroline = Truk); Giebel, Thes. Ornith., 1875, p. 681 (Carolinae = Truk?); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Ruk); Kuroda, Dobutsu, Zasshi, 27, 1915, p. 28 (Ruk); _idem_, Dobutsu Zasshi, 28, 1916, p. 71 (Ruk). _Myzomela rubratra_ Finsch (part), Proc. Zool. Soc. London, 1880, p. 575 (Ruk); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 253 (Ruk); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 31 (Ruk); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 202 (Ruk); Hartert (part), Novit. Zool., 5, 1898, p. 56 (Ruk); _idem_ (part), Novit. Zool., 7, 1900, p. 2 (Ruk); Dubois (part), Syn. Avium, 1, 1902, p. 714 (Carolines = Truk?). _Myzomela rubrata_ Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ruck); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 55 (Ruk). _Myzomela rubratra rubrata_ Wetmore (part), in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 221 (Uala). _Myzomela rubrata wetmorei_ Momiyama, Birds Micronesia, 1922, p. 15 (Type locality, Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 73 (Ruk); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 743 (Ruk); Hand-list Japanese Birds, rev., 1932, p. 172 (Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 190 (Truk). _Myzomela cardinalis major_ Mayr, Birds Southwest Pacific, 1945, p. 299 (Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 72 (Truk). _Geographic range._--Micronesia: Caroline Islands--Truk. _Characters._--Adult male: Resembles adult male of _M. c. rubrata_, but tips of plumage lighter "scarlet." Adult female: Resembles adult female of _M. c. rubrata_, but underparts more heavily tipped with scarlet; abdomen and under tail-coverts black; tail slightly darker. Differs from _M. c. dichromata_ by presence of scarlet tips on feathers of head. Immature male: Resembles adult female, but scarlet coloring of tips of feathers of head and neck narrower. Immature female: Resembles immature female of _M. c. rubrata_, but upper parts grayer; underparts darker. _Measurements._--Measurements are listed in table 48. _Specimens examined._--Total number, 19 (13 males, 6 females), as follows: Caroline Islands, USNM--Truk, 2 (Feb. 16, Dec. 13); AMNH--Truk, 17 (Feb., March, Nov., Dec.). _Nesting._--Concerning the honey-eater at Truk, Hartert (1900:2) writes "many nests were found from end of May to July, and one in March." McElroy examined three males in December, which had swollen testes. As seems to be the case with other races of this species, the Cardinal Honey-eater at Truk may nest at all times of the year. _Molt._--Specimens examined that were taken in November, December and February are in fresh or in molting plumages. _Remarks._--Bonaparte described his _Myzomela major_ as "Similis praecedenti, sed major et percoccinea." He compares it here with _Myzomela rubrata_, which he considered as a resident of the Mariana Islands. According to Oustalet (1895:202) Hombron and Jacquinot obtained one specimen of the honey-eater at Truk in 1841. This subspecies, as well as most of the others of _M. cardinalis_ in Micronesia, is best distinguished by the characteristics of the female. The male of the different subspecies shows much less geographic variation. =Myzomela cardinalis saffordi= Wetmore Cardinal Honey-eater _Myzomela rubratra saffordi_ Wetmore, Proc. Biol. Soc. Washington, 30, 1917, p. 117. (Type locality, Guam.) _Cinnyris rubrater_ Lesson (part), Dict. Sci. Nat., éd. Levrault, 50, 1827, p. 30 (Mariannes); _idem_ (part), Voy. "La Coquille," Zool., 2, 1828, p. 678 (Mariannes); _idem_ (part), Man. d'Ornith., 2, 1828, p. 55 (Mariannes); _idem_ (part), Traité d'Ornith., 1831, p. 299 (Mariannes); Kittlitz (part), Kupfertaf. Naturgesch. Vögel, 1, 1832. p. 6, pl. 8, fig. 1 (Guaham); _idem_ (part), Denkw. Reise russ. Amer. Micron. und Kamchat., 1, 1858, pp. 364, 381; 2, 1858, pp. 39, 49 (Guaham). _Certhia cardinalis_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 304 (Guaham). _Myzomela rubrater_ Hartlaub (part), Archiv f. Naturgesch., 18, 1852, p. 109 (Mariannen); Finsch and Hartlaub (part), Fauna Centralpolynesiens, 1867, p. 57 (Guaham). _Myzomela rubratra_ Bonaparte, Comptes Rendus Acad. Sci. Paris, 38, 1854, p. 263 (Mariannes); Hartlaub (part), Journ. f. Ornith., 1854, p. 167 (Mariannen); Gray (part), Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 11 (Guam); _idem_ (part), Handlist Birds, 1, 1869, p. 154 (Marian); Finsch (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 26 (Marianen); Forbes (part), Proc. Zool. Soc. London, 1879, p. 270 (Marianis); Giebel (part), Thes. Ornith., 2, 1875, p. 681 (Marinae); Finsch (part), Mitth. Ornith. Ver. Wien, 1884, p. 48 (Guam); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 31 (Marianne); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 197 (Guam, Rota, Saypan, Pagan, Agrigan); Hartert (part), Novit. Zool., 5, 1898, p. 55 (Guam, Saipan, Pagan, Agrigan); _idem_ (part), Novit. Zool., 7, 1900, p. 2 (Guam); Wheeler, Report Island of Guam, 1900, p. 13 (Guam); Seale (part), Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 55 (Marianae); Safford, The Plant World, 7, 1904, p. 263 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Mearns, Proc. U. S. Nat. Mus., 36, 1909, p. 477 (Guam); Reichenow (part), Die Vögel, 2, 1914, p. 482 (Marianen); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Marianas); Cox, Island of Guam, 1917, p. 21 (Guam). _Myzomela rubrata_ Oustalet, Le Nat., 1889, p. 260 (Mariannes); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Guam, Saipan); Safford, Osprey, 1902, p. 69 (Guam); Prowazek, Die deutschen Marianen, 1913, p. 101 (Saipan). _Myzomela rubratra saffordi_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 221 (Guam, Saipan); Momiyama, Birds Micronesia, 1922, pp. 17, 20, 21, 22 (Guam, Rota, Saipan, Pagan, Agrigan); Kuroda in Momiyama, Birds Micronesia, 1922, p. 74 (Guam, Rota, Saipan, Pagan, Agrigan); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 744 (Guam); Yamashina, Tori, 7, 1932, p. 395 (Marianas?); Hand-list Japanese Birds, rev., 1932, p. 171 (Marianas); Bryan, Guam Rec., vol. 13, no. 2. 1936, p. 25 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 190 (Guam, Rota, Agiguan, Tinian, Saipan, Almagan, Pagan, Agrigan, Assongsong). _Myzomela rubrata saffordi_ Yamashina, Tori, 19, 1940, p. 673 (Assongsong, Agiguan). _Myzomela cardinalis saffordi_ Mayr, Birds Southwest Pacific, 1945, p. 299 (Marianas); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 103 (Tinian); Borror, Auk, 1947, p. 417 (Agrihan); Stott, Auk, 1947, p. 527 (Saipan, Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 72 (Guam, Rota). _Myzomela cardinalis_ Watson, The Raven, 17, 1946, p. 41 (Guam); Strophlet, Auk, 1946, p. 540 (Guam); Baker, Condor, 49, 1947, p. 125 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam, Rota, Tinian, Agiguan, Saipan, Almagan, Pagan, Agrihan, Asuncion. _Characters._--Adult male: Resembles _M. c. rubratra_, but smaller with red coloring lighter and more orange; edges of wing and tail feathers olivaceous. Differs from adult males of _M. c. dichromata_ and _M. c. major_ by smaller size and presence of olivaceous edgings on wing and tail feathers. Adult female: Resembles adult female of _M. c. rubratra_, but smaller and paler with upper parts dark olivaceous-gray, sparsely mottled with scarlet; outer edges of wing and tail feathers greenish-olive; abdomen and under tail-coverts buffy-gray. Differs from _M. c. dichromata_ by smaller size and presence of scarlet tips of feathers on top of head. Differs from _M. c. major_ by smaller size and presence of broad olivaceous edges on tail feathers. Immature male: Resembles adult male, but red coloring less brilliant, upper parts, lower breast, and abdomen more narrowly edged with the red coloring; plumage of breast, abdomen, and under tail-coverts buffy-gray, lighter in very young birds. TABLE 49. MEASUREMENTS OF ADULT MALES OF _Myzomela cardinalis saffordi_ FROM THE MARIANA ISLANDS ==========+=====+=========+=========+=============+========= ISLAND | No. | Wing | Tail | Full culmen | Tarsus ----------+-----+---------+---------+-------------+--------- Guam | 35 | 72 | 54 | 20.0 | 22 | | (69-75) | (51-56) | (19.5-20.5) | (21-23) | | | | | Rota | 1 | 73 | | 20.0 | 22 | | | | | Tinian | 5 | 73 | 53 | 19.5 | 22 | | (71-74) | (52-55) | (19.0-20.0) | (21-24) | | | | | Saipan | 4 | 74 | 54 | 19.5 | 22 | | (72-76) | (53-55) | (19.0-20.5) | (22-23) | | | | | Agrihan | 1 | 77 | 55 | 20.0 | 22 ----------+-----+---------+---------+-------------+--------- Immature female: Resembles adult female, but paler with upper parts darker brown; underparts pale buffy-brown; outer edges of wing and tail. feathers greenish-olive, more extensive than in adult. _Measurements._--Measurements of the subspecies of _M. cardinalis_ in Micronesia are listed in table 48. Measurements of male specimens of _M. c. saffordi_ from various islands in the Marianas are listed in table 49. _Weights._--The author (1948:72) records weights of _M. c. saffordi_ from Guam as: 17 adult males, 12.7-18.0 (15.0), and 5 adult females, 10.4-15.0 (12.7). _Specimens examined._--Total number, 80 (61 males, 17 females, 2 unsexed), as follows: Mariana Islands, USNM--Guam, 43 (Jan. 22, May 26, 30, June 2, 3, 5, 7, 8, 9, 13, 18, 19, 25, 28, July 6, 10, 12, 17, 19, 20, 21, Sept., Nov. 20, 21)--Rota, 2 (Oct. 10)--Tinian, 3 (Oct. 23, 25)--Saipan 2 (Sept. 27, 30); AMNH--Guam, 23 (Jan. 22, 23, Feb. 5, 7, 9, 16, March 8, 10, 11, 13, 23, June 28, July 8, 21, Aug. 22, Nov. 25, Dec. 4, 11)--Tinian, 2 (Sept. 7, 14)--Saipan, 3 (July 8, Aug. 5, 22)--Asuncion, 1 (June)--Agrihan, 1 (June). _Nesting._--Seale (1901:55) obtained nests and eggs in the period from May to July at Guam. He found the nests 8 to 15 feet above the ground. Strophlet (1946:540) observed a pair of honey-eaters with two young on October 9 at Guam. In 1945 at Guam the NAMRU2 party obtained individuals with enlarged gonads on January 22, June 2, 5, July 21 and 23, and found evidence of nesting on June 16. Hartert (1898:56) writes that Owston's Japanese collectors obtained nests in January, February, and March. Each nest contained two eggs; they were placed four to eight feet from the ground. Probably the Cardinal Honey-eater in the Marianas nests at most times of the year. _Molt._--Specimens, with molting plumage, have been examined that were taken at most times of the year. I suspect that this bird molts at irregular intervals. _Food habits._--The honey-eater feeds partly on insect life and partly on nectar and juices from flowers. At Guam, the honey-eater was frequently found at flowers of the ink berry bush, where evidently both nectar and insects were obtained. The birds were attracted also to the coconut palms, especially when the reproductive parts of the palms were developing. _Remarks._--The Cardinal Honey-eater is one of the most conspicuous land birds in the Mariana Islands. Its scarlet plumage and characteristic fluttering flight cause it to stand out against its habitat of forest, scrub, and garden. At Guam, the author (1947b:124) found the honey-eater on 37.6 percent of the 125 roadside birds counts made in 1945. The species included 3.9 percent of all of the birds observed on these counts. Seale (1901:55) and Strophlet (1946:540) also commented on its abundance at Guam; however, in 1931, Coultas (field notes) wrote that the bird was rare; he obtained only one skin at Guam. At Rota, the NAMRU2 party found the honey-eater to be abundant. Coultas obtained only a few birds at Tinian and Saipan in 1931. In 1945, Downs (1946:103) saw only a single pair at Tinian; Gleise (1945:220) estimated the population at Tinian to be 12 in 1945. At Agrihan, Borror (1947:417) reported that the honey-eater was a common bird in 1945. Table 49 lists the measurements of males of _M. c. saffordi_ from several islands in the Marianas. Measurements of birds from Guam, Rota, Tinian, and Saipan are fairly similar, although the birds at Saipan seem to have a slightly longer wing than those at Guam. A single skin from Agrigan has larger measurements than those of birds obtained in the southern Marianas. Whether the birds in the northern Marianas are separable because of larger size can only be ascertained by the studying of more material from that region. Mayr (1945a:102) writes that males of _M. cardinalis_ seem to outnumber the females by approximately four to one. On the basis of collections and field observations, the males were found to outnumber the females in the Micronesian islands; although the ratio may not be so great as four to one. At Guam, the NAMRU2 party obtained 21 males and 8 females. Although these birds are often seen as pairs (male and female), single males are frequently observed. The females do not appear to have more secretive habits than the males. =Myzomela cardinalis kurodai= Momiyama Cardinal Honey-eater _Myzomela rubratra kurodai_ Momiyama, Birds Micronesia, 1922, p. 17. (Type locality, Yap.) _Myzomela rubratra_ Hartlaub and Finsch (part), Proc. Soc. London, 1872, pp. 89, 94 (Uap); Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 122 (Yap); Finsch (part), Journ. Mus. Godeffroy, 8, 1875, p. 4 (Yap); Forbes (part), Proc. Zool. Soc. London, 1879, p. 271 (Yap); Wiglesworth (part), Abhandl. und. Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 31 (Uap); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 202 (Yap); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Yap); Kuroda, Dobutsu. Zasshi, 27, 1915, pp. 331, 332 (Yap). _Myzomela rubrata_ Matschie (part), Journ. f. Ornith., 1901, p. 112 (Yap). _Myzomela rubrata kurodai_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 74 (Yap); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 743 (Yap); Hand-list Japanese Birds (part), rev., 1932, p. 172 (Yap); Hand-list Japanese Birds (part), 3d ed., 1942, p. 190 (Yap). _Myzomela cardinalis kurodai_ Mayr, Birds Southwest Pacific, 1945, p. 299 (Yap). _Geographic range._--Micronesia: Caroline Islands--Yap. _Characters._--Adult male: According to Momiyama (1922:17), _M. c. kurodai_ is "Similar to _M. r. saffordi_ Wetmore from Southern Marianne islands, but the tarsus is decidedly shorter, not exceeding 21 mm. (more than 21 mm. in _M. r. saffordi_), and the colour of plumage is not so much tinged with vermillion. It differs from _M. r. rubratra_, _M. r. dichromata_, and _M. r. wetmorei_ by the body measuring much shorter, and by the scarlet colour of plumage being less pronounced. The length of bill in _M. r. wetmorei_ and _kurodai_ is nearly the same." Adult female: According to Momiyama (1922:17), "Upper-parts of body dark olivaceous brown; under-parts, including chin, throat and fore neck like upper-parts, but somewhat paler; breast and abdomen yellowish ashy-white; head, lower back, rump, upper tail-coverts, chin, throat as well as lower breast tinged with scarlet (the red colour more distinct on lower back but less so on lower breast); pale olive margin to the outer web of flight-feathers." _Measurements._--Measurements are listed in table 48. _Specimens examined._--Total number, 2 males, from Caroline Islands, AMNH--Yap (Sept.). _Remarks._--This subspecies is tentatively recognized as distinct from _M. c. kobayashii_ of Palau. No female has been examined, and the two males seen and the description by Momiyama indicate that the population at Yap closely resembles the one at Palau. The Hand-list of Japanese Birds (Hachisuka _et al._, 1932:172) places the birds from Yap and Palau in the same subspecies. =Myzomela cardinalis kobayashii= Momiyama Cardinal Honey-eater _Myzomela rubratra kobayashii_ Momiyama, Birds Micronesia, 1922, p. 19. (Type locality, Pelew Islands.) _Cinnyris rubrater_ Lesson (part), Dict. Sci. Nat., éd., Levrault, 50, 1827, p. 30 (Pelew); _idem_ (part), Voy. "La Coquille," Zool., 1, 1828, p. 678 (Pelew); _idem_ (part), Man. d'Ornith., 2, 1828, p. 55 (Pelew). _Myzomela rubratra_ Gray (part), Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 11 (Pelew); Hartlaub (part), Proc. Zool. Soc. London, 1867 (1868), p. 829 (Pelew); Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 5, 116, 118 (Pelew); Gray (part), Hand-list Birds, 1, 1869, p. 154 (Pelew); Hartlaub and Finsch (part), Proc. Zool. Soc. London, 1872, pp. 89, 94 (Pelew); Finsch (part), Journ. Mus. Godeffroy, 8, 1875, pp. 4, 16 (Palau); _idem_ (part), Journ. Mus. Godeffroy, 12, 1876, pp. 17, 26 (Palau); Forbes (part), Proc. Zool. Soc. London, 1879, p. 270 (Pelew); Finsch (part), Mitth. Ornith. Ver. Wien, 1884, p. 48 (Palau); Gadow, Cat. Birds British Mus., 9, 1884, p. 129 (Pelew); Tristram, Cat. Birds, 1889, p. 206 (Pelew); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 31 (Pelew); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 202 (Palaos); Nehrkorn, Kat. Eiers., 1899, p. 79 (Palau-inseln); Seale (part), Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 57 (Pelew); Reichenow (part), Die Vögel, 2, 1914, p. 482 (Palau); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Pelew). _Myzomela rubratra_ Nehrkorn (part), Journ. f. Ornith., 1879, p. 397 (Palau); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Palau); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 55 (Pelew); Kuroda, Dobutsu. Zasshi, 28, 1916, p. 71 (Pelew). _Myzomela rubratra kobayshii_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 74 (Pelew); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 722 (Pelew). _Myzomela rubratra kurodai_ Hand-list Japanese Birds (part), rev., 1932, p. 172 (Palau); Hand-list Japanese Birds (part), 3d ed., 1942, p. 190 (Babelthuap, Koror, Peleliu). _Myzomela rubratra kurodai_ Yamashina, Tori, 10, 1940, p. 674 (Palau). _Myzomela cardinalis kobayashii_ Mayr, Birds Southwest Pacific, 1945, p. 299 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 72 (Peleliu). _Geographic range._--Micronesia: Palau Islands;--Babelthuap, Koror, Garakayo, Peleliu, Angaur. _Characters._--Adult male: Resembles _M. c. rubratra_, but smaller and with red coloring darker, near "scarlet-red"; margins of wing feathers olivaceous. Differs from adult males of other subspecies of _M. cardinalis_ by red coloring of feathers being darker. Adult female: Resembles adult female of _M. c. dichromata_ but red coloring darker, top of head only partly red; abdomen, under tail-coverts, and axillaries buff-gray; outer edges of wing and tail feathers light olive. Differs from adult females of other subspecies of _M. cardinalis_ by having top of head only partly red. Immature male: Resembles adult male, but red coloring lighter and thinly distributed; wings and tail brownish-olive; abdomen and under tail-coverts grayish. Immature female: Resembles adult female, but red coloring paler and underparts more buffy and less grayish. _Measurements._--Measurements are listed in table 48. _Specimens examined._--Total number, 42 (28 males, 11 females, 3 unsexed), as follows: Palau Islands, USNM--Koror, 4 (Nov.)--Peleliu, 11 (Aug. 29, 30, 31, Sept. 1, 5); AMNH--exact locality not given, 27 (Oct., Nov., Dec.). _Molt._--Many of the specimens taken from late August to December are in molt. Of the adult males obtained during this period almost a half had enlarged testes. _Food habits._--Stomachs of specimens obtained by the NAMRU2 party in August and September, 1945, contained vegetable matter, seeds and small insects. _Remarks._--Honey-eaters were found by the NAMRU2 party in open woodlands, in coconut groves and about human habitations. They were not seen in dense jungle areas, and appeared to prefer the plantation areas. The Cardinal Honey-eater at Palau is distinguished from other subspecies of _M. cardinalis_ in Micronesia by its deeper red coloring. In size, it closely resembles the bird at Yap and in the Marianas. _Evolutionary history of Myzomela cardinalis in Micronesia._--The genus _Myzomela_ is found in Australia, northward to Timor, Tenimber, Moluccas, Celebes, Melanesia, Polynesia and Micronesia. The range of the species _M. cardinalis_ includes the islands from the eastern Solomons, New Hebrides, and Loyalty Islands east to central Polynesia and north to Micronesia. It appears likely that _M. cardinalis_ was derived, probably along with _M. nigrita_, _M. lafargei_ and others, from an ancestral stock in the Melanesian area. Within the species _M. cardinalis_ there is one group of subspecies which exhibits a marked degree of sexual dimorphism, with the males having a much greater amount of red coloration than the females. These subspecies occur in the southern part of the range of the species (Loyalty, Santa Cruz, New Hebrides, and Samoa islands). A second group of subspecies exhibit a lesser amount of sexual dimorphism, the females possessing more of the red coloration and resembling the males more closely. This second group includes subspecies which occur in the more northern part of the range of the species (Solomons, Micronesia, and Rotuma islands). The males of the various subspecies of _M. cardinalis_ vary one from another considerably less than do the females. [Illustration: FIG. 16. Geographic distribution of _Myzomela cardinalis_ and routes of its dispersal. (1) Probable center of dispersal of _Myzomela_; (2) ranges of _M. c. sanfordi_ and _M. c. pulcherrima_ in the Solomon Islands; (3) _M. c. rubratra_; (4) _M. c. dichromata_; (5) _M. c. major_; (6) _M. c. kurodai_; (7) _M. c. kobayashii_; (8) _M. c. saffordi_; (9) _M. c. chermesina_; (10) range of _M. cardinalis_ in the Santa Cruz, New Hebrides, Banks and Loyalty islands; (11) _M. c. nigriventris_.] Figure 16 shows the probable routes of colonization used by _M. cardinalis_ to attain its present distribution in the Pacific islands. The subspecies in the eastern Solomon Islands (_M. c. pulcherrima_ Ramsey and _M. c. sanfordi_ Mayr) may be representative of the first colonization by the supposed ancestral stock. From a focal point in this area, _M. cardinalis_ has dispersed by what may be considered as two routes. One route evidently was to the south as far as the Loyalty Islands with a side branch extending to the Samoan Islands where _M. c. nigriventris_ Peale occurs. The second route extended north to the islands of Micronesia. The Caroline Islands were seemingly inhabited initially, with invasions of the Palaus made via Yap, and of the Marianas via Kusaie or Ponapé (as indicated by the comparison of specimens). Mayr (in conversation) has pointed out the close relationship between the subspecies in Micronesia and _M. c._ _chermesina_ Gray of Rotuma Island. This subspecies at Rotuma, which is located between Santa Cruz and Samoa, resembles closely _M. c. dichromata_ of Ponapé, especially in the case of the female. It is evident that the honey-eater arrived at Rotuma from Micronesia, rather than from the Solomon and Santa Cruz area to the west. =Zosterops conspicillata conspicillata= (Kittlitz) Bridled White-eye _Dicaeum conspicillatum_ Kittlitz, Kupfertaf. Naturgesch. Vögel, 2, 1833, p. 15, pl. 19, fig. 1. (Type locality, Guaham.) _Dicaeum conspicillatum_ Kittlitz, Mém. Acad. Imp. Sci. St. Pétersbourg, 2, 1835, p. 3, pl. 4 (Guaham); _idem_, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 305 (Guaham). _Zosterops conspicillatum_ Bonaparte, Consp. Avium, 1, 1850, p. 398 (Mariann. = Guam). _Zosterops conspicillata_ Reichenbach, Syn. Avium, 1852, p. 92 (Guaham); Hartlaub, Journ. f. Ornith., 1854, p. 187 (Mariannen = Guam); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 16 (Guam); Hartlaub, Journ. f. Ornith., 1865, pp. 5, 17 (Guaham); Gray, Hand-list Birds, 1, 1869, p. 163 (Ladrone = Guam); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 95 (Guaham); Giebel, Thes. Ornith., 3, 1877, p. 775 (Ladrone = Guam); Gadow, Cat. Birds British Mus., 9, 1884, p. 187 (Guam); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 37 (Guam); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 205 (Guam); Hartert (part), Novit. Zool., 5, 1898, p. 57 (Guam); Hartert, Novit. Zool., 7, 1900, p. 3 (Guam); Matschie (part), Journ. f. Ornith., 1901, pp. 112, 113 (Guam); Seale, Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 58 (Guam); Finsch (part), Das Tierreich, no. 15, 1901, p. 37 (Guam); Safford, Osprey, 1902, p. 69 (Guam); Dubois, Syn. Avium, 1, 1902, p. 711 (Guam); Safford, The Plant World, 7, 1904, p. 264 (Guam); _idem_, Contr. U. S. Nat. Herb., 9, 1905, p. 79 (Guam); Takatsukasa and Kuroda (part), Tori, 1, 1901, p. 64 (Marianne = Guam); Cox, Island of Guam, 1917, p. 21 (Guam); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 706 (Guam); Bryan, Guam. Rec., vol. 13, no. 2, 1936, p. 25 (Guam); Strophlet, Auk, 1948, p. 540 (Guam). _Zosterops conspicillatus_ Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 76 (Guam). _Zosterops conspicillata conspicillata_ Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 227 (Guam); Hand-list Japanese Birds, rev., 1932, p. 173 (Guam); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Guam); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Guam); _idem_, Birds Southwest Pacific, 1945, p. 299 (Guam); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, pp. 72, 73 (Guam). _Geographic range._--Micronesia: Mariana Islands--Guam. _Characters._--Adult: A small white-eye with upper parts near "serpentine green," becoming slightly lighter on the rump; orbital ring broad and white; fronto-loral band light yellowish-white; auriculars grayish-green; chin and throat yellowish-white; breast and abdomen dingy yellow; wing and tail feathers dark brown with greenish-yellow edges; upper mandible horn colored, lower mandible lighter yellow; legs and feet dark olive-gray; iris light umber. Adult female may be lighter on underparts. Immature: Resembles adult, but underparts paler yellow and upper mandible light yellowish-brown. _Measurements._--Measurements of _Z. c. conspicillata_ are listed in table 50. Males and females have measurements which are nearly equal. TABLE 50. MEASUREMENTS OF THE SUBSPECIES OF _Zosterops conspicillata_ ======================+=====+=========+=========+=============+========= SUBSPECIES | No. | Wing | Tail | Full culmen | Tarsus ----------------------+-----+---------+---------+-------------+--------- _Z. c. conspicillata_ | 43 | 56 | 41 | 13.5 | 19 | | (52-59) | (37-43) | (13.0-14.5) | (18-20) | | | | | _Z. c. saypani_ | 29 | 52 | 38 | 12.5 | 18 | | (50-55) | (35-40) | (12.0-13.5) | (17-19) | | | | | _Z. c. rotensis_ | 3 | 53 | 42 | 13.0 | 18 | | (51-55) | (42-43) | (13.0-13.5) | (18-19) | | | | | _Z. c. semperi_ | 28 | 55 | 38 | 12.5 | 18 | | (54-57) | (36-41) | (12.0-13.5) | (17-19) | | | | | _Z. c. owstoni_ | 22 | 55 | 36 | 12.5 | 19 | | (52-57) | (34-38) | (12.0-13.0) | (18-20) | | | | | _Z. c. takatsukasai_ | 16 | 54 | 36 | 13.0 | 19 | | (53-55) | (34-39) | (13.0-14.0) | (19-20) ----------------------+-----+---------+---------+-------------+--------- _Weights._--The author (1948:73) records the weights of 11 adult males as 9.5-14.0 (10.5), of 3 adult females as 8.0-10.0 (9.3). _Specimens examined._--Total number, 61 (33 males, 17 females, 11 unsexed), as follows: Mariana Islands, USNM--Guam, 27 (May 24, 29, 30, June 2, 3, 25, 28, July 12, 18, 19, 20, 23, 26, Sept., Oct. 8); AMNH--Guam, 34 (Jan., March, July, Aug., Sept., Nov., Dec.). _Nesting._--Seale (1901:58) reports the taking of one nestling and three nests with eggs of the bridled white-eye at Guam in the period from May to July. The NAMRU2 party obtained little evidence of nesting in late May to July. Three males taken in the period of June and July had enlarged gonads. Hartert (1898:57) records several nests taken in February and March at Guam. He writes, "The nest is a fairly deep cup, placed in the fork of a branch, woven together of fine grasses and roots, and on the outside ornamented with cobwebs, wool and cottonwood, varying in width from 8 to 5 cm. The clutches consist of 2 or 3 eggs. The eggs are pale blue, like all _Zosterops_ eggs. They measure 18:13, 17:13.2, 17:12.2, 15.5:12:5, 17:13.5, and between these measurements." Coultas obtained specimens with enlarged gonads in August. According to Oustalet (1895:207), Marche found nests and young in May or June. _Remarks._--Kittlitz obtained the Bridled White-eye at Guam, when he visited the island, in March, 1828. He found the birds common and they reminded him of titmice. Marche obtained a series of 21 skins at Guam in August and September, 1887, and in February and March, 1888. Seale (1901:58) observed the birds in flocks of 10 to 20 in roadside bushes and in waste areas. He mentions that their principal foods are insects. The NAMRU2 party found the birds to be restricted to certain areas on Guam, where they were found in small flocks moving about in low trees. They were taken at only five localities, two of these being at the northern end of the island in vegetation along the high, coastal cliffs. The other localities were in the central part of the island in low trees in the uplands. Strophlet (1946:540) found them in grasslands on the foothills. Arvey (field notes) saw a flock of 12 white-eyes at Mount Tenjo in July, 1946. The white-eye is a very active bird, always moving rapidly through the vegetation or flying across open areas to disappear into scrub foliage. As they move about they make a twittering sound, which is considered to be a flocking call. =Zosterops conspicillata saypani= Dubois Bridled White-eye _Zosterops conspicillata Saypani_ Dubois, Syn. Avium, 1, 1902, p. 711. (Type locality, Saypan.) _Zosterops conspicillata_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 205 (Saypan); Hartert (part), Novit. Zool., 5, 1898, p. 57 (Saipan); Finsch (part), Das Tierreich, no. 15, 1901, p. 37 (Saipan); Matschie (part), Journ. f. Ornith., 1901, pp. 112, 113 (Saipan); Prowazek, Die deutschen Marianen, 1913, p. 101 (Saipan); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Marianne = Saipan). _Zosterops conspicillata_ var. _saypani_ Snouckaert, Alauda, (2), 3, 1931, p. 22 (Saypan). _Zosterops conspicillatus_ Kuroda (part), in Momiyama, Birds Micronesia, 1922; p. 76 (Saipan). _Zosterops saipani_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 706 (Saipan). _Zosterops conspicillata saipani_ Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 227 (Saipan); Hand-list Japanese Birds, rev., 1932, p. 173 (Saipan, Tinian); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Saipan, Tinian); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Tinian, Saipan); _idem_, Birds Southwest Pacific, 1945, p. 299 (Saipan, Tinian); Downs, Trans. Kansas Acad. Sci., 49, 1946, p. 104 (Tinian); Stott, Auk, 64, 1947, p. 527 (Saipan); Baker, Smithson, Misc. Coll., vol. 107, no. 15, 1948, p. 73 (Saipan, Tinian). _Zosterops conspicillatus saipani_ Yamashina, Tori, 7, 1932, p. 398 (Tinian). _Geographic range._--Micronesia: Mariana Islands--Tinian, Saipan. _Characters._--Adult: Resembles _Z. c. conspicillata_, but slightly smaller with fronto-loral band more greenish yellow; auriculars olivaceous; orbital ring narrower; upper parts brighter olive; underparts pale yellowish-white; bill darker. Birds from Saipan resemble closely birds from Tinian, but upper parts may be slightly brighter and underparts slightly more yellowish; iris chestnut. _Measurements._--Measurements are listed in table 50. Twenty-three birds from Tinian measure: wing, 51 (50-53); tail, 38 (35-41); full culmen, 12.0 (12.0-13.0); tarsus, 18 (17-18); six birds from Saipan measure: wing, 54 (52-55); tail, 37 (35-39); full culmen, 13.0 (13.0-15.0); tarsus, 18 (17-19). Birds from Saipan are slightly larger than birds from Tinian. _Specimens examined._--Total number, 33 (18 males, 13 females, 2 unsexed), as follows: Mariana Islands, USNM--7 (Oct. 7, 8, 9, 10, 23); AMNH--26 (July, Aug., Sept.). _Nesting._--Yamashina (1932a:398) records the taking of three nests of the Bridled White-eye at Tinian on January 8, 1932. The nests contained one, two, and three eggs, respectively. The color of the eggs is uniformly pale blue; the nests were situated two to four meters from the ground. Oustalet (1895:207) writes that Marche obtained records of nesting at Saipan in the period from May to July. Of 18 birds taken by Coultas at Tinian in September, 1931, one-half of them had enlarged gonads. _Molt._--Specimens examined that were taken in July, August, September, and October have molting plumage. _Remarks._--Marche obtained the first skins of this white-eye at Saipan; he got 23 specimens in May, June, and July, 1887. The population at Saipan was initially considered similar to that at Guam; it was later given subspecific separation by Dubois. The birds at Tinian exhibit some differences from the birds at Saipan, and it is possible that these two populations should be regarded as subspecifically distinct from one another. In 1931, Coultas (field notes) found this white-eye common at Saipan and Tinian. He writes "The little fellow has adjusted himself to the gardens and shrubs in the villages. He is a seed eater and makes himself at home now around human habitation. I have seen him climbing over potted plants on the window ledges of dwellings. His cheerful little sibilation uttered continuously while at work or while on the wing makes him friends wherever he goes. He is no longer a bird of the forest as he has none here to go to." Several observers in the late war have published notes on this white-eye. Stott (1947:527) writes that he was reminded of the bush-tit (_Psaltriparus_) when he observed the behavior of this white-eye; Moran (1946:262) writes that it is "Similar in size and behavior to our vireos." Gleise (1945:220) estimated the population of white-eyes at Tinian at 500 plus in 1945. Downs (1946:104-105) found the birds to be abundant at Tinian; he found them in small flocks in low brush or trees and at edges of open fields as well as elsewhere. He saw a white-eye eating "a large green fuzzy caterpillar." =Zosterops conspicillata rotensis= Takatsukasa and Yamashina Bridled White-eye _Zosterops semperi rotensis_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 486. (Type locality, Rota.) _Zosterops semperi_ Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 207 (Rota); Hartert (part), Novit. Zool., 5, 1898, p. 57 (Rota); Finsch (part), Das Tierreich, no. 15, 1901, p. 30 (Rota); Seale (part), Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 58 (Rota); Dubois (part), Syn. Avium, 1, 1902, p. 710 (Rota); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Marianne = Rota). _Zosterops semperi semperi_ Momiyama (part), Birds Micronesia, 1922, p. 23 (Rota); Kuroda, (part) in Momiyama, Birds Micronesia, 1922, p. 75 (Rota). _Zosterops semperi rotensis_ Snouckaert, Alauda. (2), 4, 1932, p. 459 (Rota); Yamashina, Tori, 7, 1932, p. 399 (Rota); Hand-list Japanese Birds, rev., 1932, p. 173 (Rota). _Zosterops conspicillata rotensis_ Hand-list Japanese Birds, 3d ed., 1942, p. 193 (Rota); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Rota); _idem_, Birds Southwest Pacific, 1945, p. 299 (Rota); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 73 (Rota). _Geographic range._--Micronesia: Mariana Islands--Rota. _Characters._--Adult: Upper parts and sides of neck between "warbler green" and "pyrite yellow" becoming lighter on the rump; auriculars light yellowish-green; orbital ring white; fronto-loral band narrowly tinged with yellow; underparts dingy yellow; wing and tail feathers dark with light greenish-yellow edges; upper mandible light brown; lower mandible light yellowish-brown; feet light brown. Resembles _Z. c. conspicillata_, but brighter greenish-yellow above; chin and throat yellow like rest of underparts; fronto-loral band tinged with bright yellow; auriculars resemble closely the upper parts in color; narrow orbital ring. _Measurements._--Measurements are listed in table 50. _Specimens examined._--Total number, 5 (3 males, 1 female, 1 unsexed), from Mariana Islands, USNM--Rota (Oct. 18, 20, 22). _Nesting._--Yamashina (1932a:399) records the taking of one nest containing two eggs at Rota on March 7, 1931. _Molt._--Specimens taken in October were in molt. _Remarks._--Oustalet (1895:207) reported on two specimens of white-eye taken at Rota by Marche. He considered them as being similar to the birds at Palau. The birds at Rota were named as a separate subspecies by Takatsukasa and Yamashina in 1931. The NAMRU2 party found the birds to be numerous at Rota in October, 1945. =Zosterops conspicillata semperi= Hartlaub Bridled White-eye _Zosterops semperi_ Hartlaub, in Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 117. (Type locality, Pelew Islands.) _Zosterops semperi_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 95 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 16, pl. 4, fig. 1 (Palau); Giebel, Thes. Ornith., 3, 1877, p. 777 (Pelew); Nehrkorn, Journ. f. Ornith., 1879, p. 396 (Palau); Finsch (part), Journ. f. Ornith., 1880, p. 286 (Palau); _idem_ (part), Ibis, 1881, p. 111 (Pelew); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Finsch (part), Mitth. Ornith. Ver. Wien, 1884, p. 48 (Palau); Gadow (part), Cat. Birds British Mus., 9, 1884, p. 183 (Pelew); Tristram, Cat. Birds, 1889, p. 212 (Pelew); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 37 (Pelew); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 208 (Palaos); Hartert (part), Novit. Zool., 5, 1898, p. 57 (Pelew); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Palau); Finsch (part), Das Tierreich, no. 15, 1901, p. 30 (Palau); Seale (part), Occ. Papers Bernice P. Bishop Mus., 1, 1901, p. 58 (Pelew); Dubois (part), Syn. Avium, 1, 1902, p. 710 (Palau); Takatsukasa and Kuroda (part), Tori, 1, 1915, pp. 55, 64 (Pelew). _Zosterops semperi semperi_ Hartert, Novit. Zool., 7, 1900, p. 2 (Pelew); Momiyama (part), Birds Micronesia, 1922, pp. 22, 23 (Pelew); Kuroda (part), in Momiyama, Birds Micronesia, 1922, p. 75 (Pelew); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 705 (Pelew); Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 486 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 174 (Palau). _Zosterops conspicillata semperi_ Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 227 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 193 (Babelthuap, Koror, Peliliu); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Palau); Mayr, Birds Southwest Pacific, 1945, p. 299 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1945, p. 73 (Garakayo). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu. _Characters._--Adult: Resembles adult of _Z. c. rotensis_, but fronto-loral band lighter yellow, and coloring is usually not continuous above; auriculars paler; breast and abdomen paler yellow; maxilla and feet darker; mandible whitish. Resembles adult of _Z. c. conspicillata_, but brighter greenish-yellow above; coloring of chin and throat like that of rest of underparts; auriculars colored like back; fronto-loral band narrowly tinged with bright yellow and not completely connected above; orbital ring narrow; iris grayish-white. _Measurements._--Measurements are listed in table 50. _Specimens examined._--Total number, 30 (15 males, 14 females, 1 unsexed), as follows: Palau Islands, USNM--Babelthuap, 2 (Nov. 27)--Koror, 4 (Nov. 14, 19)--Garakayo, 4 (Sept. 18, 19); AMNH--exact locality not given, 20 (Oct., Nov., Dec.). _Molt._--All birds examined (taken in September, October, and November) are in molting plumage. _Food habits._--At Garakayo, birds were observed in small flocks feeding in low trees. Two stomachs examined, which were from individuals of these flocks, contained very small seeds. _Remarks._--Oustalet (1895:207) first pointed out the relationship between the Bridled White-eye at Palau and the one at Rota. Hartert (1898:57) thought that the occurrence of the same kind of bird at Palau and at Rota was "very peculiar." It was not until 1931 that Takatsukasa and Yamashina separated the two populations by name. Coultas (field notes) found the Bridled White-eye to be uncommon in the Palaus in 1931. He observed them in the tops of trees, noting that they were wary and easily frightened away by the shooting of a gun. Coultas writes that he found the birds to be numerous at Peleliu; in 1945, the NAMRU2 party did not find the birds at that island. The only locality where they were found to occur was on the small island of Garakayo where the writer shot four Bridled White-eyes on September 18 and 19. He found two or three small flocks in low trees near the summit of a hill on the island. Approximately 25 birds were in this area. =Zosterops conspicillata owstoni= Hartert Bridled White-eye _Zosterops semperi owstoni_ Hartert, Novit., Zool., 7, 1900, p. 2. (Type locality, Ruk.) _Zosterops semperi semperi_ Finsch (part), Journ. f. Ornith., 1880, p. 287 (Ruck); _idem_ (part), Proc. Zool. Soc. London, 1880, p. 575 (Ruk); _idem_ (part), Ibis, 1881, p. 110 (Ruk); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk); Gadow (part), Cat. Birds British Mus., 9, 1884, p. 183 (Central Carolines=Truk); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 37 (Ruk); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 208 (Ruk); Hartert (part), Novit. Zool., 5, 1898, p. 57 (Ruk); Nehrkorn, Kat. Eiers, 1899, p. 80 (Ruk). _Zosterops semperi owstoni_ Dubois, Syn. Avium, 1, 1902, p. 710 (Ruk); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 223 (Truk); Momiyama, Birds Micronesia, 1922, p. 24 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 75 (Ruk); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 705 (Ruk); Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 496 (Ruk); Yamashina, Tori, 7, 1932, p. 400 (Truk); Hand-list Japanese Birds, rev., 1932, p. 174 (Truk). _Zosterops owstoni_ Finsch, Das Tierreich, no. 15, 1901, p. 31 (Ruk); Matschie (part), Journ. f. Ornith., 1901, pp. 112, 113 (Ruck); Reichenow, Die Vögel, 2, 1914, p. 470 (Karolinen = Truk); Takatsukasa and Kuroda, Tori, 1, 1915, pp. 55, 64 (Ruk). _Zosterops conspicillata owstoni_ Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 277 (Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 193 (Truk); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Truk); _idem_, Birds Southwest Pacific, 1945, p. 299 (Truk); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, pp. 73, 74 (Truk). _Geographic range._--Micronesia: Caroline Islands--Truk. _Characters._--Adult: Resembles adult of _Z. c. semperi_, but upper parts darker olive and less yellowish-green; fronto-loral band deeper yellow; auriculars slightly darker; black line on lores and under eye more distinct; underparts deeper yellow; abdomen with greenish tinges. Resembles adult of _Z. c. rotensis_, but upper parts duller, more green and less yellow; fronto-loral band lighter and less distinct, coloring near that of _Z. c. semperi_; auriculars darker green; underparts slightly darker, more olive-green and less yellow. _Measurements._--Measurements are listed in table 50. _Specimens examined._--Total number, 23 (12 males, 10 females, 1 unsexed), as follows: Caroline Islands, USNM--Truk, 3 (Feb. 16); AMNH--Truk, 20 (Feb., March, May, Nov.). _Nesting._--Yamashina (1932a:400) records the taking of a nest with one egg at Truk in May. Hartert (1900:2) records nests containing single eggs taken at Truk from May to July. Nests were found in bushes and trees four to eight feet above the ground. The eggs are pale blue. He gives measurements of seven eggs. _Remarks._--Kubary obtained the first specimens of the Bridled White-eye at Truk. Hartert described the population as a new subspecies using material taken by Owston's collectors. The bird was named in honor of Alan Owston. McElroy of the NAMRU2 party visited Truk in December, 1945. He found this white-eye in the mountainous areas at Moen and Udot islands. =Zosterops conspicillata takatsukasai= Momiyama Bridled White-eye _Zosterops semperi takatsukasai_ Momiyama, Birds Micronesia, 1922, p. 22. (Type locality, Ponapé.) _Zosterops semperi_ (part), Finsch, Journ. f. Ornith., 1880, p. 286 (Ponapé); _idem_ (part), Proc. Zool. Soc. London, 1880, p. 575 (Ponapé); _idem_ (part), Ibis, 1881, p. 115 (Ponapé); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Finsch (part), Mitth. Ornith. Ver. Wien, 1884, p. 48 (Ponapé); Gadow (part), Cat. Birds British Mus., 9, 1884, p. 183 (Central Carolines, Ponapé); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 37 (Ponapé); Oustalet (part), Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 208 (Ponapé); Finsch, Das Tierreich, no. 15, 1901, p. 30 (Ponapé); Dubois (part), Syn. Avium, 1, 1902, p. 710 (Ponapé); Takatsukasa and Kuroda (part), Tori, 1, 1915, pp. 55, 64 (Ponapé). _Zosterops owstoni_ Matschie (part), Journ. f. Ornith., 1901, pp. 112, 113 (Ponapé). _Zosterops semperi takatsukasai_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 76 (Ponapé); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 705 (Ponapé); Snouchaert, Alauda, (2), 3, 1931, p. 22 (Ponapé); Takatsukasa and Yamashina, Tori, 7, 1932, p. 400 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 174 (Ponapé). _Zosterops conspicillata takatsukasai_ Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 227 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 193 (Ponapé); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Ponapé); _idem_, Birds Southwest Pacific, 1945, p. 299 (Ponapé); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 73 (Ponapé). _Zosterops conspicillata_ Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: Resembles adult of _Z. c. semperi_, but slightly smaller with fronto-loral area more sulfur-yellow; underparts brighter, especially the coloring of the abdomen and under tail-coverts; iris light chestnut. _Measurements._--Measurements are listed in table 50. _Specimens examined._--Total number, 20 (10 males, 9 females, 1 unsexed) from Caroline Islands, AMNH--Ponapé (Nov., Dec.). _Nesting._--Yamashina (1932a:400) records nests and eggs of _Z. c. takatsukasai_. The nests, each containing a single egg, were taken on July 10 and 20, 1931. Coultas (field notes) writes that the nest consists of a small, cup-shaped structure of grasses and hair. The natives told him that two eggs were laid. In birds taken by Coultas in November the gonads were beginning to enlarge; specimens taken in December had swollen gonads. From the evidence at hand, it would appear that the Bridled White-eye at Ponapé breeds at two periods of the year, the winter and the summer. _Molt._--Specimens examined, which were taken by Coultas in November and December, are in fresh plumage. _Remarks._--In 1931, Coultas (field notes) found this white-eye to be rare at Ponapé. He obtained almost every one that he saw to get his series of 20 specimens. He found the birds usually in pairs around yellow-flowering bushy trees. A specimen taken by Richards had "small insects" in its stomach. =Zosterops conspicillata hypolais= Hartlaub and Finsch Bridled White-eye _Zosterops hypolais_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 95. (Type locality, Uap.) _Zosterops hypolais_ Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 122 (Yap); Giebel, Thes. Ornith., 3, 1877, p. 776 (Carolinae=Yap); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap); Gadow. Cat. Birds British Mus., 9, 1884, p. 186 (Uap); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 37 (Uap); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 208 (Uap); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 60 (Yap); Finsch, Das Tierreich, no. 15, 1901, p. 24 (Yap); Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Yap); Dubois, Syn. Avium, 1, 1902, p. 708 (Uap); Reichenow, Die Vögel, 2, 1914, p. 469 (Karolinen=Yap); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Mackenzie=Yap); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 76 (Yap); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 700 (Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Yap). _Zosterops conspicillata hypolais_ Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 227 (Yap); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Yap); _idem_, Birds Southwest Pacific, 1945, p. 299 (Yap). _Zosterops hypolais_ Hand-list Japanese Birds, rev., 1932, p. 173 (Yap). _Geographic range._--Micronesia: Caroline Islands--Yap. _Characters._--According to Hartlaub and Finsch (1872:95), "Upper parts of a pale greyish green, throat and under tail-coverts a pure but very pale whitish-yellow; breast and abdomen of a mixed pale grey and pale yellow; wing- and tail-feathers pale blackish, margined with greenish colour of the back; under wing-coverts and inner margins of remiges white; eye-ring indistinct; beak fuscous, the under mandible paler, except at the tip; feet plumbeous." _Remarks._--No specimen has been examined by me. I am following Stresemann (1931:227) in placing the Bridled White-eye at Yap as a subspecies of _Z. conspicillata_. This is one arrangement; the committee who prepared the Hand-list of Japanese Birds (1942:192) treat this bird as a separate species. The Japanese probably have more specimens of this bird than anyone else and may be in a better position to judge its taxonomic status. Specimens of this white-eye were taken by Fisher in 1946 at Yap. His report (soon to be published) may throw additional light on the degree of distinctness of _Z. c. hypolais_. On the basis of published descriptions it is evident that _Z. c. hypolais_ has a few characters in common with other members of the species. _Evolutionary history of Zosterops conspicillata._--The small olive-green and yellow white-eyes of Micronesia have been considered as belonging to several species by authors in the past. As late as 1930, Mathews (1930; 700, 706) placed them in four species. Stresemann (1931a: 227) put them all in the species _Z. conspicillata_, an arrangement which is being followed in this report. It is evident, however, that these subspecies of _Z. conspicillata_ can be associated into three groups. The author (1948:73) states that _Z. c. conspicillata_ and _Z. c. saypani_ have pale chins and throats, light fronto-loral bands, blackish coloring at the bend of the wings and broad, white orbital rings. Another group, _Z. c. rotensis_, _Z. c. semperi_, _Z. c. owstoni_, and _Z. c. takatsukasai_, have bright yellow chins and throats, matching the rest of the underparts, obscure fronto-loral bands, which are narrowly tinged with yellow, yellowish coloring at the bend of the wings, and narrow, white orbital rings. _Z. c. hypolais_ apparently falls into a third group by itself, as indicated by the published descriptions. There is apparently some variation in the color of the eyes of these subspecies; they may be either whitish or chestnut in color. The data are insufficient to determine the significance of this color character. _Z. conspicillata_ is restricted to Micronesia and appears to have little close relationship to other species of the genus. _Z. conspicillata_ shows little affinity to white-eyes to the north and northwest of Micronesia belonging to the species _Z. japonica_, of which representatives are found in the Bonin and Volcano islands. _Z. conspicillata_ shows greater affinity to species found to the west and to the south of Micronesia. It may have colonized Micronesia from the south or southeast (Polynesia), even though the species is absent at Kusaie; however, _Z. conspicillata_ shows more relationships to species now living to the westward and the southwestward, and it probably invaded Micronesia from some place in that direction. _Z. conspicillata_ differs from species found in Melanesia and Malaysia chiefly in color of the forehead, lores, fronto-loral band, crown, nape, breast, abdomen, orbital ring, and bill. Also there are differences in the breadth of the orbital ring. _Z. conspicillata_ shows evidence of relationships with _Z. nigrorum_ of the Philippines and _Z. montanus_ of the Philippines and other parts of Malaysia. _Z. nigrorum_ resembles _Z. c. semperi_ of Palau in size, but is brighter yellow-green above with a darker and less curved bill and brighter underparts. The fronto-loral band and the lores are colored the same in _Z. nigrorum_ and _Z. c. semperi_. _Z. montanus_ resembles _Z. conspicillata_ especially in size and in shape of the bill. _Z. lutea intermedia_ of the Makassar area shows some affinity to _Z. conspicillata_, although the bill is heavier. The Micronesia species also bears a close resemblance to _Z. griseotincta_ of the Papuan region. This is especially true of _Z. c. takatsukasai_ at Ponapé; however, _Z. griseotincta_ has a heavier and larger bill. _Z. lateralis_ from southern Melanesia and Australia is not very different from _Z. conspicillata_ aside from its grayish and brownish coloring. _Z. conspicillata_ probably was derived from an ancestral stock which came to Micronesia from the Philippine or Moluccan area, rather than directly from Melanesia. _Z. conspicillata_ seemingly shows the closest resemblance to _Z. nigrorum_ or to some of its relatives in the Australo-Moluccan area. The subspecies at Palau, _Z. c. semperi_, appears to be the connecting link. Whether the form at Yap represents an independent colonization is not known; such might also be true in the case of the subspecies at Guam and at Saipan and Tinian. If these are considered as separate colonizations, then the populations can be regarded as separate species. Mayr, (in conversation) has pointed out the affinity of the white-eye at Samoa, _Z. samoensis_, with _Z. conspicillata_ and suggests that _Z. samoensis_ is derived from the Micronesian species. =Zosterops cinerea cinerea= (Kittlitz) Micronesian Dusky White-eye _Drepanis cinerea_ Kittlitz, Kupfertaf. Naturgesch. Vögel, 1, 1832, p. 6, pl. 8, fig. 2. (Type locality, Ualan = Kusaie.) _Drepanis cinerea_ Kittlitz, Mém. Acad. Imp. Sci., St. Pétersbourg, 2, 1835, p. 4, pl. 5 (Ualan); _idem_, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 285 (Ualan); Reichenbach, Syn. Avium, 1853, p. 242 (Ualan); Kittlitz, Denkw. Reise, russ. Amer. Micron. und Kamchat., 1, 1858, p. 367 (Ualan). _Zosterops cinerea_ Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 131 (Ualan); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 16 (Oualan); _idem_, Hand-list Birds, 1, 1869, p. 163 (Caroline = Kusaie); Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 96 (Ualan); Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 27 (Ualan); _idem_, Ibis, 1881, pp. 107, 108 (Kuschai); Gadow, Cat. Birds British Mus., 9, 1884, p. 198 (Kushai); Tristram, Cat. Birds, 1889, p. 210 (Kuschai); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 36 (Ualan); Hartert, Kat. Vogelsamml., Senckenb., 1891, p. 31 (Ualan); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 208 (Oualan); Finsch, Das Tierreich, no. 15, 1901, p. 45 (Kusaie); Dubois, Syn. Avium, 1, 1902, p. 713 (Kusaie); Takatsukasa and Kuroda, Tori, 1, 1915, pp. 55, 64 (Kusaie); Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 224 (Kusaie); Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 230 (Kusaie); Hand-list Japanese Birds, rev., 1932, p. 173 (Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Kusaie). _Dicaeum cinereum_ Hartlaub, Journ. f. Ornith., 1854, p. 168 (Carolinen = Kusaie). _Zosterops cinereus_ Finsch, Journ. Mus. Godeffroy, 8, 1875, p. 17 (Ualan); idem, Journ. f. Ornith., 1880, pp. 286, 297, 300 (Kuschai); _idem_, Mitth. Ornith. Ver. Wien, 1884, p. 48 (Kuschai). _Zosterops Kittlitzi_ Finsch, Journ. f. Ornith., 1880, p. 300 (Type locality, Kusaie); Reichenow and Schalow, Journ. f. Ornith., 1881, p. 94 (Kusaie?). _Tephras cinereus_ Matschie, Journ. f. Ornith., 1901, pp. 111, 112, 113 (Ualan). _Tephras cinerea_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 77 (Kusaie); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 712 (Oualan). _Zosterops cinerea cinerea_ Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Kusaie?); _idem_, Birds Southwest Pacific, 1945, p. 300 (Kusaie). _Geographic range._--Micronesia: Caroline Islands--Kusaie. _Characters._--Adult: A small, dusky white-eye with upper parts smoky olivaceous-gray; lores dingy white; auriculars brownish; no white orbital ring; wing and tail feathers dark brownish-gray with paler greenish-gray outer edges; underparts pale ashy-gray, chin lighter, flanks darker; bill black; feet light brown; iris brown. _Measurements._--Measurements of _Z. cinerea_ are listed in table 51. Males and females have approximately equal measurements. TABLE 51. MEASUREMENTS OF _Zosterops cinerea_ ====================+=====+=========+=========+=============+========= SUBSPECIES | No. | Wing | Tail | Culmen | Tarsus --------------------+-----+---------+---------+-------------+--------- _Z. c. cinerea_ | 47 | 63 | 37 | 15.0 | 20 | | (60-65) | (35-39) | (14.0-16.5) | (19-20) | | | | | _Z. c. ponapensis_ | 38 | 59 | 38 | 13.5 | 20 | | (57-61) | (36-40) | (13.0-14.5) | (18-21) | | | | | _Z. c. finschii_ | 30 | 65 | 43 | 17.5 | 21 | | (63-67) | (40-46) | (16.0-18.5) | (20-23) --------------------+-----+---------+---------+-------------+--------- _Specimens examined._--Total number, 50 (33 males, 17 females), as follows: Caroline Islands, USNM--Kusaie, 1 (Feb. 9); AMNH--Kusaie, 49 (Jan., Feb., March). _Nesting._--Coultas found that approximately one-half of the males which he obtained in March, 1931, had swollen gonads. _Molt._--Many of the birds obtained in January and February were molting, and many of those obtained in March were in fresh plumage. _Remarks._--Coultas obtained a large series of these birds at Kusaie in 1931, where he found them to be common. =Zosterops cinerea ponapensis= Finsch Micronesian Dusky White-eye _Zosterops ponapensis_ Finsch, Proc. Zool. Soc. London, 1875 (1876), p. 643. (Type locality, Ponapé.) _Zosterops ponapensis_ Finsch, Journ. Mus. Godeffroy, 12, 1876, pp. 17, 27, pl. 2, fig. 1 (Ponapé); _idem_., Proc. Zool. Soc. London, 1877 (1878), p. 778 (Ponapé); Nehrkorn, Journ. Mus. Godeffroy, 1879, p. 396 (Ponapé?); Finsch, Journ. f. Ornith., 1880, pp. 286, 300 (Ponapé); _idem_, Ibis. 1881, pp. 110, 111, 115 (Ponapé); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Ponapé); Finsch, Mitth. Ornith. Ver. Wien, 1884, p. 48 (Ponapé); Gadow, Cat. Birds British Mus., 9, 1884, p. 198 (Ponapé); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 36 (Ponapé); Bolau, Mitteil. Naturhist. Mus. Hamburg. 1898, p. 60 (Ponapé); Nehrkorn, Kat. Eiers., 1899, p. 80 (Ponapé); Finsch, Das Tierreich, no. 15, 1901, p. 46 (Ponapé); Dubois, Syn. Avium, 1, 1902, p. 713 (Ponapé); Reichenow, Die Vögel, 2, 1914, p. 470 (Ponapé); Takatsukasa and Kuroda, Tori, 1, 1915, pp. 55, 65 (Ponapé); Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 230 (Ponapè); Yamashina, Tori, 7, 1932, p. 397 (Ponapé); Hand-list Japanese Birds, rev., 1932, p. 173 (Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Ponapé). _Tephras ponapensis_ Matschie, Journ. f. Ornith., 1901, pp. 111, 112, 113 (Ponapé); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 77 (Ponapé); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 712 (Ponapé). _Zosterops ponapenensis_ Wetmore, in Townsend and Wetmore, Bull. Mus. Comp. Zoöl., 63, 1919, p. 224 (Ponapé). _Zosterops cinerea ponapensis_ Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Ponapé?); _idem_, Birds Southwest Pacific, 1945, p. 300 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: Resembles adult of _Z. c. cinerea_, but smaller with upper parts umber-brown, forehead pale gray; underparts mostly pale gray, sides of breast and abdomen brownish-buff; under tail-coverts pale buffy-gray. _Measurements._--Measurements are listed in table 51. _Specimens examined._--Total number, 47 (28 males, 17 females, 2 unsexed), as follows: Caroline Islands, USNM--Ponapé, 1 (Feb. 11); AMNH--Ponapé, 46 (Nov., Dec.). _Nesting._--Yamashina (1931a:397-398) describes two nests of _Z. c. ponapensis_, each containing one egg. These were taken at Ponapé on August 4 and 11, 1931. The nests were located 2.5 meters from the ground. The eggs are light blue and pale greenish-blue in color; one measures 18.5 by 13.5. He writes, "The nest consists of two layers, the inner and the outer. The outer layer is made of fine roots, fibers, leaves and petals, interwoven with a large quantity of cotton-wool, and the inner layer is made of fibers of fine roots only." Coultas found that a large number of birds taken in November had enlarged gonads, especially the males; in December, fewer birds with swollen gonads were obtained. _Remarks._--Coultas found this white-eye to be common at Ponapé, when he visited that island in November and December, 1930. He observed the birds in flocks and found them noisy and quarrelsome. They feed in bushes and small trees on seeds and insects. Richards obtained "small large-seeded blackish berries" from the stomach of a female from Ponapé. He found the birds to frequent low altitudes in and about native gardens. =Zosterops cinerea finschii= (Hartlaub) Micronesian Dusky White-eye _Tephras finschii_ Hartlaub, in Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 6, pl. 3. (Type locality, Pelew Islands.) _Tephras finschii_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, pp. 117, 118 (Pelew Islands). _Zosterops finschii_ Gray, Hand-list Birds, 1, 1869, p. 164 (Pelew); Gadow, Cat. Birds British Mus., 9, 1884, p. 197 (Pelew); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 60 (Palau). _Zosterops finschi_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, pp. 89, 96 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 17 (Palau); _idem_, Journ. Mus. Godeffroy, 12, 1876, p. 27 (Palau); Giebel, Thes. Ornith., 3, 1877, p. 775 (Pelew); Finsch, Journ. f. Ornith., 1880, p. 300 (Pelew?); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Tristram, Cat. Birds, 1889, p. 211 (Pelew); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 36 (Pelew); Finsch, Das Tierreich, no. 15, 1901, p. 45 (Palau); Dubois, Syn. Avium, 1, 1902, p. 713 (Pelew); Reichenow, Die Vögel, 2, 1914, p. 470 (Palau); Takatsukasa and Kuroda, Tori, 1, 1915, pp. 55, 64 (Pelew); Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 230 (Palau); Hand-list Japanese Birds, rev., 1932, p. 173 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Babelthuap, Koror). _Tephras finschi_ Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Palau); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 77 (Pelew); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 712 (Pelew). _Zosterops cinerea finschi_ Mayr, Birds Southwest Pacific, 1945, p. 300 (Palau). _Zosterops cinerea finschii_ Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 74 (Peleliu, Garakayo). _Geographic range._--Micronesia: Palau Islands--Babelthuap, Koror, Garakayo, Peleliu, Ngabad. _Characters._--Adult: Resembles adult of _Z. c. cinerea_, but upper parts mostly browner; wing and tail feathers browner; head blacker; rump lighter than back; auriculars grayish-brown; lores dark; sides of head and neck brownish; underparts mostly dark; chin and throat smoky gray; breast and abdomen more brown less gray; sides, flanks and under tail-coverts brown. Resembles adult of _Z. c. ponapensis_, but larger with underparts more buffy; upper parts darker. _Measurements._--Measurements are listed in table 51. _Specimens examined._--Total number, 37 (15 males, 19 females, 3 unsexed), as follows: Palau Islands, USNM--Babelthuap, 1 (Nov. 27)--Koror, 3 (Nov. 4, 5)--Garakayo, 6 (Sept. 18)--Peleliu, 5 (Aug. 27, Sept. 10); AMNH--exact locality not given, 22 (Oct., Nov., Dec.). _Molt._--Many of the specimens of _Z. c. finschii_ taken in the period from August to December show evidences of molt. Some of the birds taken in November and in December appear to be in fresh plumage. All three subspecies of _Z. cinerea_ evidently undergo a period of molt in the late summer and fall. _Remarks._--The Micronesian Dusky White-eye of Palau was found on several of the islands of the southern Palaus by the NAMRU2 party in 1945. The bird was observed in flocks of five or more individuals moving rapidly through the foliage of trees and shrubs. It was not found in the dense, undisturbed jungle areas, but rather in second growth vegetation and along the margins of woodlands. At Peleliu, birds were noted in trees and shrubs along the roadways; at Garakayo, birds were seen in low trees near the summits of hills. At Garakayo, _Z. cinerea_ and _Z. conspicillata_ were found in the same areas near the tops of the hills. Both species appeared to be feeding on seeds of the same trees (unidentified but resembling the hibiscus). _Z. cinerea_ was more numerous than _Z. conspicillata_ and appeared (from observations made on September 18, 1945) to be the dominant species and was seen to chase the smaller _Z. conspicillata_ away. Coultas (field notes) found _Z. cinerea_ "fairly common" in 1931 at Palau. _Evolutionary history of Zosterops cinerea._--The dusky white-eyes of Micronesia were considered as separate species until 1944, when Mayr (1944b:7) treated them as conspecific, stating that the bird at Ponapé has characters intermediate between those at Kusaie and Palau. Earlier, Hartert (1900:3) suggested a close association between _Z. cinerea_ and the species at Truk (now _Rukia ruki_). Mayr concludes that _Z. cinerea_ and _R. ruki_ are not closely related, and points out that the absence of a white orbital ring in _Z. cinerea_ does not necessarily mean that the bird should be considered as belonging to a genus other than _Zosterops_. The pathway of colonization and the ancestral stock of _Z. cinerea_ are not certainly known. Among the white-eyes of the Polynesian, Melanesian and Malayan areas, there are few kinds which _Z. cinerea_ resembles closely. Mayr (1941b:204) writes that the _Z. cinerea_ at Ponapé was derived from either Polynesia or Papua. I find little in common between _Z. cinerea_ and the species in these areas, and in my opinion _Z. cinerea_ is closest to _Z. atriceps_ of the Moluccas. _Z. atriceps_ has plumage which is part grayish and part brownish. Its underparts resemble those of _Z. c. cinerea_ but are paler gray; crown, neck, and shoulder much like that of _Z. c. ponapensis_ and _Z. c. finschii_; and bill resembling that of _Z. c. cinerea_. _Z. atriceps_ differs by having olive-green coloring on back and wings and yellowish coloring on under side of tail. Thus, it is possible that _Z. cinerea_ invaded Micronesia from the Moluccan region, reaching either Palau or Ponapé initially. =Rukia palauensis= (Reichenow) Palau Greater White-eye _Cleptornis palauensis_ Reichenow, Journ. f. Ornith., 1915, p. 125. (Type locality, Babeldzuap = Babelthuap, Palauinseln.) _Megazosterops palauensis_ Stresemann, Ornith. Monatsber., 38, 1930, p. 159 (Baobeltaob); Snouckaert, Alauda (2), 3, 1931, p. 26 (Palau); Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 235 (Baobel Taob = Babelthuap); Mathews, Ibis, 1931, p. 48 (Palau); Hand-list Japanese Birds, rev., 1932, p. 172 (Palau); Yamashina, Tori, 10, 1940, p. 674 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 191 (Babelthuap, Peleliu). _Rukia palauensis_ Mayr, Amer. Novit., no. 1269, 1944, p. 7 (Palau); _idem_, Birds Southwest Pacific, 1945, pp. 294, 300 (Peliliu); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, pp. 67, 74 (Peleliu). _Geographic range._--Micronesia: Palau Islands-Babelthuap, Peleliu. _Characters._--Adult: A large white-eye with upper parts near "Saccardo's olive" (some individuals darker brown), head and neck more olivacious, rump browner; auriculars blackish with pale yellow streaks; narrow supra-orbital stripe pale olive; orbital ring indistinct; underparts near "olive lake," chin lighter, under tail-coverts light yellowish-brown; wing and tail feathers dark brown, except for tawny outer edges and whitish inner edges; maxilla horn-color; mandible yellowish to tawny; feet tawny; iris grayish-brown. _Measurements._--Measurements of _Rukia_ are listed in table 52. Measurements of males and females are comparable within the same species. TABLE 52. MEASUREMENTS OF _Rukia_ =================+======+=========+=========+=============+========= SPECIES | No. | Wing | Tail | Culmen | Tarsus -----------------+------+---------+---------+-------------+--------- _R. palauensis_ | 19 | 80 | 54 | 21.5 | 25 | | (76-84) | (51-57) | (20.0-22.5) | (24-26) | | | | | _R. ruki_ | 8 | 81 | 52 | 21.5 | 23 | | (76-85) | (51-52) | (20.0-23.0) | (22-24) | | | | | _R. sanfordi_ | 18 | 70 | 44 | 23.0 | 21 | | (67-71) | (41-47) | (22.0-24.0) | (20-22) -----------------+------+---------+---------+-------------+--------- _Specimens examined._--Total number, 21 (12 males, 9 females), as follows: Palau Islands, USNM--Peleliu, 11 (Aug. 27, 29, 30, Sept. 4, 5, 6, 7, Dec. 4, 5); AMNH--Peleliu?, 10 (Dec.). _Molt._--Specimens taken in August and September are in worn plumage, a few individuals show evidence of molt. Specimens taken in December are in fresh plumage, although two or three individuals are in the final stages of molt. This places the period of molt as September, October, and November. Nesting evidently occurs in the summer; one male taken on August 27, 1945, had enlarged gonads. _Remarks._--The Palau Greater White-eye was described under the generic name _Cleptornis_ by Reichenow. This generic allocation was not followed by subsequent authors; Stresemann proposed the generic name _Megazosterops_ in 1930, and Mayr (1944b:7) placed this white-eye in the genus _Rukia_ along with other large white-eyes from Micronesia. In employing this name, Mayr writes, "The generic names _Rukia_ (for _ruki_) and _Kubaryum_ (for _oleaginea_) were published simultaneously in the same publication. As first reviser I select the name _Rukia_, which not only is shorter but is also based on a species which I have been able to examine." _R. palauensis_ is recorded from Babelthuap and Peleliu of the Palau Islands. In 1931, Coultas found the birds only at the island of Peleliu, where he obtained nine specimens from a flock. In 1940, Yamashina (1940:674) writes that it is a very rare species at Palau. Marshall (1949:219) found the bird at Peleliu but at no other islands visited. In 1945, the NAMRU2 party obtained eight specimens at Peleliu from two localities on the eastern side of the island in jungle areas relatively undisturbed by war activities. The birds were fairly common in the brush and vines of the jungle undergrowth at these two areas. There were no flocks seen; usually singles or pairs were noted. The bird bears a striking resemblance to _Psamathia annae_, which lives in the same environment and has a somewhat similar coloration, shape and posture. These two birds probably have undergone a parallel development. Competition between the two was not noted. _Psamathia_ is evidently less restricted in its distribution. _R. palauensis_ has a restricted distribution in the Palau Islands, as indicated by the observations of Coultas, the Japanese and the NAMRU2 party. The disturbance resulting from the war activities has undoubtedly influenced the population and restricted further the preferred habitat of this white-eye, especially at Peleliu. =Rukia oleaginea= (Hartlaub and Finsch) Yap Greater White-eye _Zosterops oleaginea_ Hartlaub and Finsch, Proc. Zool. Soc. London, 1872, p. 95. (Type locality, Uap.) _Zosterops oleaginea_ Gräffe, Journ. Mus. Godeffroy, 2, 1873, p. 122 (Yap); Gadow, Cat. Birds British Mus., 9, 1884, p. 187 (Yap); Finsch, Das Tierreich, no. 15, 1901, p. 24 (Yap); Dubois, Syn. Avium, 1, 1902, p. 708 (Uap); Reichenow, Die Vögel, 2, 1914, p. 469 (Karolinen=Yap); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Mackenzie); Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 230 (Yap); Hand-list Japanese Birds, rev., 1932, p. 173 (Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 192 (Yap). _Zosterops oleaginea_ Giebel, Thes. Ornith., 3, 1877, p. 777 (Mackenzie); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 391 (Yap); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 37 (Uap); Oustalet, Nouv. Arch. Mus. Hist. Nat. Paris, (3), 7, 1895, p. 208 (Uap); Bolau, Mitteil. Naturhist. Mus. Hamburg, 1898, p. 60 (Yap). _Tephras oleaginea_ Matschie, Journ. f. Ornith., 1901, pp. 112, 113 (Yap). _Kubaryum oleaginus_ Momiyama, Birds Micronesia, 1922, p. 1 (Yap); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 77 (Yap). _Kubaryum oleagineum_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 712 (Yap). _Rukia oleaginea_ Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Yap); _idem_, Birds Southwest Pacific, 1945, p. 300 (Yap). _Geographic range._--Micronesia: Caroline Islands--Yap. _Characters._--According to Hartlaub and Finsch (1872:95), "General colour a deep oil-green, with a decided fulvous hue; underparts a little paler, and a little more yellowish; eye-ring satin-white; ears blackish; upper and under tail coverts with a slight rufous tinge; wing- and tail-feathers blackish, with oil-green margins; under wing-coverts whitish-grey; beak fulvous, under mandible, except at the tip, yellowish; feet pale, probably yellow; iris reddish white." _Remarks._--No specimens of _R. oleaginea_ have been examined by me, and I am following Mayr (1944b:7) in including it with the other large white-eyes of Micronesia in the genus _Rukia_. =Rukia ruki= (Hartert) Truk Greater White-eye _Tephras ruki_ Hartert, Bull. British Ornith. Club, 7, 1897, p. 5. (Type locality, Ruk.) _Tephras ruki_ Hartert, Ibis, 1898, p. 144 (Ruk); _idem_, Novit. Zool., 7, 1900, p. 3 (Ruk); Matschie, Journ. f. Ornith., 1901, pp. 111, 112, 113 (Ruck); Mathews, Syst. Avium Australasianarum, 2, 1930, p. 712 (Ruk). _Zosterops ruki_ Finsch, Das Tierreich, no. 15, 1901, p. 46 (Ruk); Dubois, Syn. Avium, 1, 1902, p. 713 (Ruk); Reichenow, Die Vögel, 2, 1914, p. 470 (Ruk); Takatsukasa and Kuroda, Tori, 1, 1915, p. 64 (Ruk); Stresemann, Mitt. Zool. Mus. Berlin, 17, 1931, p. 230 (Truk); Hand-list Japanese Birds, rev., 1932, pp. 172 (Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 191 (Truk). _Rukia ruki_ Momiyama, Birds Micronesia, 1922, p. 2 (Ruk); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 78 (Ruk); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Truk); _idem_, Birds Southwest Pacific, 1945, p. 301 (Truk). _Geographic range._--Micronesia: Caroline Islands--Truk. _Characters._--According to Hartert (1897:5), "Entirely sepia-brown, the inner webs of the remiges and under wing-coverts lighter, inclining to whitish; the primaries darker, the outer webs bordered with the same colour as the back. Bill black; iris red; tarsi and feet orange-rufous; claws mouse-brown." _R. ruki_ may be distinguished from other species of _Rukia_ by its dark olive-brown coloring. _Measurements._--Measurements are listed in table 52. _Specimens examined._--Total number, 7 (4 males, 2 females, 1 unsexed), from Caroline Islands, AMNH--Truk (Nov., Dec.). _Remarks._--This white-eye was first obtained by Owston's collectors in 1895 at Truk. Hartert (1900:3) writes, "It is most peculiar that the late J. Kubary, who was an excellent collector, and who spent more than fourteen months on Ruk, did not obtain this bird. It is probably not numerous, and occurs only on a certain secluded spot not visited by Kubary." In like manner, _R. palauensis_ was not described from Palau until 1915, although several collectors had visited the island at previous times. Hartert included the Truk Greater White-eye in the genus _Tephras_ of Hartlaub. Later, Momiyama (1922:2) made this bird the type for his new genus _Rukia_, in which Mayr has placed all of the large white-eyes of Micronesia. =Rukia sanfordi= (Mayr) Ponapé Greater White-eye _Rhamphozosterops sanfordi_ Mayr, Ornith. Monatsber., 39, 1931 [mailing date, Nov. 4, 1931, _ex_ Mayr, 1944b:8], p. 182. (Type locality, Ponapé.) _Cinnyrorhyncha longirostra_ Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931 [printed date, Oct. 15, 1931, but mailing date for extra-Japanese recipients, Nov. 23, 1931, _ex_ Mayr, 1944b:8], p. 599. (Type locality, Ponapé); Hand-list Japanese Birds, rev., 1932, p. 172 (Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 191 (Ponapé). _Cinnyrorhyncha longirostris_ Mathews, Ibis, 1933, p. 94 (Ponapé). _Rhamphozosterops sanfordi_ Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). _Rukia sanfordi_ Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 7 (Ponapé); _idem_, Birds Southwest Pacific, 1945, p. 301 (Ponapé). _Geographic range._--Micronesia: Caroline Islands--Ponapé. _Characters._--Adult: upper parts buffy-olive, head greenish, rump and upper tail-coverts buffy-brown; wing and tail feathers dark brown, outer edges yellowish-olive; underparts grayish-buff, chin and throat faintly washed with greenish-yellow; under tail-coverts darker; bill long, curved and brownish-black, base of mandible paler; feet yellowish; iris chestnut. _R. sanfordi_ is distinguished from other species of _Rukia_ by its smaller size, its paler coloration and its longer and more curved bill. _Measurements._--Measurements are listed in table 52. _Specimens examined._--Total number, 18 (12 males, 6 females), from Caroline Islands, AMNH--Ponapé (Nov., Dec.). _Remarks._--Coultas obtained this white-eye at Ponapé in 1931; he writes (field notes) that it is "a very rare bird on Ponapé. I found them at one tree, a sort of a gum-tree, at about 2,000 feet, where they were collecting from the flowers of the tree. I was attracted by their deep-throated sibilation that is uttered while feeding. They were not in the least disturbed by the noise of the gun and remained long enough for me to collect a substantial series. One old man, who lives not far from the tree, was the only one I could find who knew the bird." Six males and one female taken in December had swollen gonads. Richards found this bird to be rare at Ponapé in 1947-1948. He writes (field notes) that the bird was seen twice (he obtained one male), once in deep forest at about 700 feet and once at the summit of Jokaj at 900 feet. He observed a group of three birds "wildly and loudly chasing one another from tree to tree." The male obtained had yellowish sap adhering to its bill. The Ponapé Greater White-eye has an appearance very much like that of some of the honey-eaters. Takatsukasa and Yamashina (1931c:599) write, "General appearance very much like either _Cinnyris_ or _Myzomela_, but it differs from them by its very small first primary, which is far shorter than the primary coverts, and also the smooth cutting edge of the bill, though the bill is similarly shaped as to that of _Cinnyris_. These characteristics show that this bird belongs to _Zosteropidae_ but not _Nectarinidae_ or _Meliphagidae_." Mayr and the Japanese workers, Takatsukasa and Yamashina, published descriptions of this white-eye at Ponapé almost simultaneously. Mayr (1944b:8) contends that his name, _Rhamphozosterops sanfordi_, is valid because the mailing date of the journal (Ornithologische Monatsberichte) in which _R. sanfordi_ was proposed was November 4, 1931, while his investigations show that the earliest mailing date to European and American ornithologists and libraries of the issue of Dobutsugaku Zasshi in which the name _Cinnyrorhyncha longirostra_, proposed by Takatsukasa and Yamashina, appeared was November 23, 1931. Mayr (1944b:8) points out that Japanese friends of the authors of the name _C. longirostra_ assert that they saw copies of the description [inferentially printed copies] prior to November 23, 1931. These Japanese, as far as is known, have not claimed that they saw copies before November 4, 1931, and Mayr's conclusion that his name, _R. sanfordi_, has priority is here accepted. If the name _C. longirostra_ Takatsukasa and Yamashina appeared in printed form and if copies, in requisite number, were distributed to specialists or libraries in Japan, or anywhere else, on or before November 3, 1931, the name _C. longirostris_ has priority over _R. sanfordi_. _Evolutionary history of Rukia in Micronesia._--There is little known concerning the status of the large white-eyes of Micronesia. Most of them were not found by the earlier collectors and are at present reported to be rare or restricted in their distribution. Little is known concerning the food preferences and nesting activities of the birds and also whether they are actually in danger of extermination or whether their populations are normally as low as have been reported. Originally described under four different generic names, they are now considered as belonging in a single genus, _Rukia_. I have compared specimens of _Rukia_ with those of other members of the family Zosteropidae found in the Pacific area. _Rukia_ is apparently not closely related to _Z. conspicillata_ and _Z. cinerea_ of Micronesia but has been derived from a different source or sources. The author has compared _Rukia_ with the genera _Zosterops_, _Woodfordia_, _Hypocryptadius_, _Apoia_, _Chlorocharis_, _Pseudozosterops_, and _Tephrozosterops_. Results of these comparisons indicate that large and well-differentiated white-eyes are found on a number of the islands of Oceania. These white-eyes include _Woodfordia_, _Rukia_, _Zosterops inornata_, _Z. albogularis_, _Z. tenuirostris_, and _Z. strenua_. These birds are all large, have large bills (either longer or stouter or both), large and long tarsi, and often short and rounded wings. _Rukia_ apparently has undergone a differentiation which parallels that which has taken place in these other white-eyes, but there is no evidence of a close relationship between these birds and _Rukia_. There are some resemblances between _Rukia_ and _Woodfordia superciliosa_ of Rennell Island; _W. superciliosa_ is the same size and has a bill somewhat similar to that of _R. ruki_ and a coloration not very different from that of _R. sanfordi_. _R. ruki_ and _R. sanfordi_ may have been derived originally from a common ancestral stock in Melanesia, with subsequent isolation on small islands for considerable time where differentiation took place. _Rukia_ also shows some resemblance to the genus _Apoia_, especially to _A. pinaiae_ of Ceram. There is also a possibility that the large white-eyes of Micronesia are merely highly modified species of the genus _Zosterops_; this has been suggested by Mayr (1944b:7). It is my opinion that _Rukia_ is a valid genus and is as much different from the genus _Zosterops_ (or more so) than other recognized genera of large white-eyes (_Woodfordia_ and _Apoia_). There is also the strong possibility that the large white-eyes of Micronesia have been derived from more than one source (and are falsely united in one genus); however, it is my feeling that they represent a single colonization, which successfully established itself at four islands and evolved into four divergent species. Possibly _R. oleaginea_ is the least specialized and is closest to the ancestral stock; however, this supposition is based on study of the original description and on a colored plate of the bird in a paper by Kuroda (1922b:pl. 7, fig. 4). In summary, it seems that the large Micronesian white-eyes of the genus _Rukia_ came originally from Melanesia. Possibly they came from Malaysia. Probably the birds have been derived from a single ancestral stock, that became established at four islands of Micronesia and became differentiated along diverse lines, so much so that some ornithologists have considered them as belonging to separate endemic genera. =Erythrura trichroa trichroa= (Kittlitz) Blue-faced Parrot-finch _Fringilla trichroa_ Kittlitz, Mém. Acad. Imp. Sci. St. Pétersbourg, 2, 1835, p. 8, pl. 10. (Type locality, Ualan = Kusaie.) _Fringilla trichroa_ Kittlitz, Obser. Zool., in Lutké, Voy. "Le Séniavine," 3, 1836, p. 285 (Ualan); _idem_, Denk. Reise russ. Amer. Micron. und Kamchat., 2, 1858, p. 38 (Ualan). _Estrelda trichroa_ Gray, Genera Birds, 2, 1849, p. 369 (Kusaie?); Gray, Cat. Birds Trop. Is. Pacific Ocean, 1859, p. 27 (Oualan). _Erythrura trichroa_ Bonaparte, Consp. Avium, 1, 1850, p. 457 (Ualan); Hartlaub, Archiv f. Naturgesch., 18, 1852, p. 133 (Carolinen = Kusaie); _idem_, Journ. f. Ornith., 1854, p. 168 (Carolinen = Kusaie); Gray, Hand-list Birds, 2, 1870, p. 58 (Ualan); Giebel, Thes. Ornith., 2, 1875, p. 118 (Carolinen = Ualan); Finsch, Journ. Mus. Godeffroy, 12, 1876, p. 36 (Ualan); _idem_ (part), Journ. f. Ornith., 1880, pp. 290, 297, 302 (Kusaie); _idem_ (part), Ibis, 1881, pp. 104, 108 (Kuschai); Salvadori (part), Ornith. Papuasia, 2, 1881, p. 442 (Carolinis = Kusaie?); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 281 (Kusaie); Sclater (part), Ibis, 1881, p. 545 (Ualan); Sharpe (part), Cat. Birds British Mus., 13, 1890, p. 385 (Carolines = Kusaie); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 42 (Ualan); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ualan); Dubois (part), Syn. Avium, 1, 1902, pp. 583 (Carolines = Kusaie); Takatsukasa and Kuroda (part), Tori, 1, 1915, p. 64 (Kusaie). _Erythrura kittlitzi_ Bonaparte, Consp. Avium, 1, 1850, p. 457 (_ex_ Bonaparte MSS.) (Type locality, Ualan); Gray, Hand-list Birds, 2, 1870, p. 58 (Caroline Islands = Kusaie). _Erythrura trichros trichros_ Hartert (part), Novit. Zool., 7, 1900, p. 6 (Kusaie); Kuroda (part), in Momiyama, Birds Micronesia, 1922, pp. 27, 29, 78 (Kusaie); Mayr (part), Amer. Mus. Novit., no. 489, 1931, p. 4 (Kusaie); Takatsukasa and Yamashina, Tori, 7, 1931, p. 110 (Kusaie); Hand-list Japanese Birds, rev., 1932, p. 170 (Kusaie); Hand-list Japanese Birds, 3d ed., 1942, p. 189 (Kusaie); Mayr, Birds Southwest Pacific, 1945, p. 302 (Kusaie). _Chloromunia trichroa trichroa_ Mathews (part), Syst. Avium Australasianarum, 2, 1930, p. 840 (Ualan). _Geographic range._--Micronesia: Caroline Islands--Kusaie. _Characters._--Adult: A small finch with thick, stout bill; head, neck, back, and scapulars between "parrot green" and "grass green"; forehead, orbital area, auriculars, and malar area bluish; sides of neck green tinged with yellowish; edge of forehead and lores blackish; wing-coverts and outer margins of wings yellowish-green; underparts like back but paler green; rump, upper tail-coverts and outer edges of tail feathers near "Pompeian red"; wing and tail feathers mostly brownish; bend of wing greenish; under wing-coverts brownish; axillaries buffy tinged with greenish; bill black; feet light yellowish-brown; iris brown. Adult female duller than male. Immature: Resembles adult, but lacks bluish coloring on sides of head and on forehead; underparts washed with buffy brown; rump and tail duller carmine. _Measurements._--Measurements are listed in table 53. _Specimens examined._--Total number, 14 (12 males, 2 females), from Caroline Islands, AMNH--Kusaie (Feb., March, April). _Molt._--Specimens taken in February and March have mostly new feathers, molt having been almost completed when obtained. _Remarks._--Kittlitz was the first person to describe the Blue-faced Parrot-finch; he found it at Kusaie when he visited the island in the winter of 1827-28. Later, it was found to have an extensive range in Micronesia, Melanesia, northern Australia, Celebes, and the Moluccas. This small finch may be kept as a pet in a cage by native peoples, but as far as I know there is no evidence that the bird has been introduced to island areas as a result of this practice. TABLE 53. MEASUREMENTS OF _Erythrura trichroa_ IN MICRONESIA =====================+=====+=========+=========+=============+========= SUBSPECIES | No. | Wing | Tail | Culmen | Tarsus ---------------------+-----+---------+---------+-------------+--------- _E. t. trichroa_ | 6 | 58 | 46 | 13.0 | 17 | | (57-59) | (43-48) | (12.5-13.5) | (16-17) | | | | | _E.t. clara_ | 29 | 59 | 45 | 13.5 | 17 | | (57-62) | (41-50) | (13.0-14.5) | (17-18) | | | | | _E. t. pelewensis_* | 1 | 61.5 | 51 | 13.5 | 18 ---------------------+-----+---------+---------+-------------+--------- * Kuroda (1922:28). Coultas observed the finch at Kusaie in 1931; he wrote (field notes) that it is a common bird but difficult to obtain. He found it in most parts of the island and at all elevations; the bird appeared to prefer dense underbrush of the jungle or marginal vegetation. He found no evidence of breeding activity in February, March or April. =Erythrura trichroa clara= Takatsukasa and Yamashina Blue-faced Parrot-finch _Erythrura trichroa clara_ Takatsukasa and Yamashina, Tori, 7, 1931, p. 110. (Type locality, Ruk Island.) _Erythrura trichroa_ Finsch (part), Journ. f. Ornith., 1880, p. 290 (Ponapé, Hügeln = Truk); _idem_, Proc. Zool. Soc. London, 1880, p. 576 (Ruk); _idem_ (part), Ibis, 1881, pp. 104, 110, 112, 115 (Ponapé); Schmeltz and Krause (part), Ethnogr. Abth. Mus. Godeffroy, 1881, p. 353 (Ruk); Salvadori (part), Ornith. Papuasia, 2, 1881, p. 442 (Ponapé); Sclater (part), Ibis, 1881, p. 545 (Ponapé, Ruk); Sharpe (part), Cat. Birds British Mus., 13, 1890, p. 385 (Carolines = Truk, Ponapé); Wiglesworth (part), Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 42 (Ponapé, Ruk); Nehrkorn, Kat. Eiers, 1899, p. 122 (Ruk); Matschie (part), Journ. f. Ornith., 1901, p. 112 (Ruk, Ponapé); Dubois (part), Syn. Avium, 1, 1902, p. 583 (Carolines = Ponapé); Takatsukasa and Kuroda (part), Tori, 1, 1915, pp. 55, 64 (Ponapé); Mayr, Proc. 6th Pacific Sci. Congr., 4, 1941, p. 204 (Ponapé). _Erythrura trichroa trichroa_ Hartert (part), Novit. Zool., 7, 1900, p. 6 (Ruk, Ponapé); Kuroda (part), in Momiyama, Birds Micronesia, 1922, pp. 27, 28, 29, 78 (Ponapé, Ruk); Mayr (part), Amer. Mus., Novit., no. 489, 1931, p. 4 (Ponapé, Ruk). _Chloromunia trichroa_ Mathews, Birds Australia, 12, 1925, p. 208 (Ruk). _Chloromunia trichroa trichroa_ Mathews (part), Syst. Avium Australasianarum, 2, 1930, p. 840 (Carolines = Truk, Ponapé). _Erythrura trichroa clara_ Hand-list Japanese Birds, rev., 1932, p. 170 (Truk, Ponapé); Hand-list Japanese Birds, 3d ed., 1942, p. 189 (Truk, Ponapé); Mayr, Birds Southwest Pacific, 1945, p. 302 (Truk, Ponapé); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 74 (Truk). _Lobospingus trichroa clara_ Mathews, Ibis, 1933, p. 96 (Ruk, Ponapé). _Geographic range._--Micronesia: Caroline Islands--Truk, Ponapé, Lukunor? _Characters._--Adult: Resembles adult of _E. t. trichroa_, but slightly larger with underparts more yellowish and less greenish; blue on head slightly paler; sides of neck tinged more strongly with yellowish. Birds from Ponapé are slightly paler than those from Truk. _Measurements._--Measurements are listed in table 53. Birds from Ponapé and Truk differ but little in measurements. _Specimens examined._--Total number, 39 (22 males, 16 females, 1 unsexed), as follows: Caroline Islands, USNM--Truk, 2 (May 5, Dec.); AMNH--Truk, 15 (March, June, Nov.)--Ponapé, 22 (Dec.). _Molt._--Birds taken in March and June are not in molt. Some of the specimens obtained in November and December are in molt. _Remarks._--The differences between _E. t. trichroa_ at Kusaie and _E. t. clara_ at Ponapé and Truk are slight. Takatsukasa and Yamashina (1931d:110) separate _E. t. clara_ from _E. t. trichroa_ of Kusaie on the basis of a paler blue coloring on head, body more yellowish green and sides of neck more distinctly golden-yellow. Coultas obtained specimens at Ponapé in 1930 and reports (field notes) that the bird occurs in the extensive grassland areas of the island but that the numbers are small. He estimates the population to be less than 100 individuals. He learned that the Japanese had trapped them for shipment to Japan as caged birds. Coultas writes that the finch at Ponapé "is very shy and flies readily when he is disturbed. As soon as a call of alarm is uttered the whole flock flies up from the ground and heads for the true forest where they will hide. They will also work along in the grass, and make a getaway. The bird has a little hissing sybilation that it utters when on the wing." He found the bird in flocks of 3 to 20; immatures were frequently found alone. McElroy of the NAMRU2 party obtained a female at Moen Island in the Truk Atoll in December, 1945. He found small flocks of these birds in dense vegetation along streams. =Erythrura trichroa pelewensis= Kuroda Blue-faced Parrot-finch _Erythrura trichroa pelewensis_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 27. (Type locality, Pelew Islands). _Erythrura trichroa pelewensis_ Kuroda, Ibis, 1927, p. 692 (Pelew); Mayr. Amer. Mus. Novit., no. 489, 1931, p. 4 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 171 (Palau); Hand-list Japanese Birds, 3d ed., 1942, p. 189 (Babelthuap); Mayr, Birds Southwest Pacific, 1945, p. 301 (Palau). _Chloromunia trichroa pelewensis_ Mathews, Syst. Avium Australasianarum, 2, 1930, p. 840 (Pelew). _Geographic range._--Micronesia: Palau Islands--Babelthuap. _Characters._--Kuroda (1922a:27) describes the bird as follows, "Resembles _E. trichroa_ (Kittlitz) from Carolines (the type from Kusaie), but distinguishable from it by the bill being much thicker and stouter, by the chin being tinged with blue, by the under-parts being paler throughout and somewhat tinged with bluish, by the rump and upper tail-coverts being bright crimson instead of dull crimson, by the central tail-feathers brownish red instead of dull crimson, by the distinct shafts of central tail-feathers and by longer wing and tail." _Measurements._--The measurements by Kuroda of a single specimen are listed in table 53. _Remarks._--Only one specimen of this subspecies is known. The NAMRU2 party did not obtain any record of it in the southern Palaus in 1945. If still present in the islands, it may be confined to the higher forested areas of Babelthuap. _Evolutionary history of Erythrura trichroa in Micronesia._--The Blue-faced Parrot-finch has been recorded from Kusaie, Ponapé, Truk and Palau, which are all "high" islands of southern Micronesia. This bird belongs to a species which occurs in Melanesia, northern Australia, Celebes, and the Moluccas. Stresemann (1940:40) points out the interesting observation that this species ranges only east of Wallace's Line. Mayr (1931c:1-10) has reviewed the parrot-finches of the genus _Erythrura_ and places _E. trichroa_ in the subgenus _Erythrura_, noting that _E. t. cyaneifrons_ from Banks and the New Hebrides is similar to the subspecies found in Micronesia. As a group the subspecies of _E. trichroa_ are very similar, but the populations in Micronesia appear closest to subspecies from the Solomons, Admiralty Islands and possibly to _E. t. modesta_ from the Moluccas, which appears to indicate that Micronesia was invaded from the south or from the southwest via the Moluccas. Whether the little known subspecies at Palau represents an independent invader from the Moluccas is uncertain. =Lonchura nigerrima minor= (Yamashina) Black-breasted Weaver-finch _Munia (Donacola) hunsteini minor_ Yamashina, in Takatsukasa and Yamashina, Dobutsu. Zasshi, 43, 1931, p. 600. (Type locality, Ponapé.) _Lonchura hunsteini minor_ Hand-list Japanese Birds, rev., 1932, p. 171 (Ponapé, Truk); Hand-list Japanese Birds, 3d ed., 1942, p. 190 (Ponapé, Truk). _Donacola hunsteini minor_ Mathews, Ibis, 1933, p. 95 (Ponapé). _Lonchura nigerrima minor_ Mayr, Birds Southwest Pacific, 1945, p. 301 (Ponapé, ?Truk). _Geographic range._--Micronesia: Caroline Islands--Ponapé, Truk? _Characters._--Yamashina in Takatsukasa and Yamashina (1931c:600) characterizes this subspecies as similar to _M. hunsteini_ from New Ireland, but smaller; the wing of the adult of the bird from Ponapé is from 46 to 49 mm, instead of 50-51 mm. as in the New Ireland bird. Moreover the crown and nape are white instead of pearl gray. _Remarks._--Little is known concerning this subspecies named by Yamashina at Ponapé. No specimens have been seen by me. Richards obtained one male at Ponapé in 1947-1948. He found the birds in large flocks. =Lonchura punctulata cabanisi= (Sharpe) Philippine Nutmeg Mannikin _Munia cabanisi_ Sharpe, Cat. Birds British Mus., 13, 1890, p. 353. (Type locality, Luzon.) _Munia punctulata cabanisi_ Kuroda, in Momiyama, Birds Micronesia, 1922, p. 78 (Yap). _Lonchura punctulata cabanisi_ Yamashina, Tori, 7, 1932, p. 395 (Yap); Hand-list Japanese Birds, rev., 1932, p. 171 (Yap); Hand-list Japanese Birds, 3d ed., 1942, p. 189 (Yap). _Geographic range._--Philippine Islands and Micronesia. In Micronesia: Palau Islands; Caroline Islands--Yap. _Characters._--A small finch with upper parts light grayish-brown, feathers with white shafts producing a streaked appearance; lores, anterior part of auriculars, malar region, and feathers of chin and throat chocolate-brown with faint white shafts; breast and sides mottled white and dark brown, middle of abdomen and under tail-coverts pale buffy-white, wings brown with lighter edges, under wing dark with lighter coverts; upper tail-coverts and middle tail feathers dark olive, outer tail feathers colored like wings; bill heavy and black; feet dark brown. _Remarks._--The Philippine Nutmeg Mannikin is a resident on the island of Yap. Yamashina (1932a:395) records a nest containing one egg taken there on May 15, 1932. Marshall (1949:221) records this bird at Palau on November 6 and December 2, 1945. Whether this bird was introduced to Yap and Palau by man or whether it reached there by independent invasion is unknown. SUMMARY AND CONCLUSION The avifauna of Micronesia consists of 206 kinds of birds belonging to 37 families and 91 genera. Of these, 30 kinds are sea birds, 29 kinds are migratory shore birds, and 146 kinds are land and freshwater birds. Of the 30 sea birds, 18 kinds are resident; of the 147 land and fresh-water birds, 104 kinds are resident and 6 kinds have been introduced by man. There are no resident shore birds in Micronesia. The following conclusions can be drawn from this study: 1. The islands of Micronesia are oceanic islands and were seemingly formed independently of any present day continental land mass. Terrestrial organisms have reached these islands by "over-water dispersal." The avifauna of Micronesia has been received from the following sources: Polynesia, Melanesia, the Moluccas, Celebes, Phillipines, and Palearctica (see figure 8). 2. Oceanic birds are among the oldest forms of bird life inhabiting Micronesia. The presence of elevated islands containing phosphate, resulting from the deposition of guano by oceanic birds, is some indication of the length of time during which these birds have been present. In number of individuals, the oceanic birds inhabiting the inshore zone are more numerous than those inhabiting the offshore and pelagic zones, although twelve of the eighteen resident kinds of oceanic birds prefer the offshore and pelagic zones. Most of the species of oceanic birds resident in Micronesia are circumtropical in distribution; no residents are known in Micronesia which have been derived from Palearctica or the North Pacific. Micronesia has no endemic oceanic birds. 3. On the migratory flights, shore birds reach Micronesia along three distinct flyways, which in this report are named the Asiatic-Palauan Flyway, the Japanese-Marianan Flyway, and the Nearctic-Hawaiian Flyway (see figure 7). The shore birds began to utilize the Pacific islands as wintering grounds by gradually spreading from the Eastern Hemisphere rather than from the Western Hemisphere. 4. More than half (52 percent) of the land birds and fresh-water birds in Micronesia were derived directly from ancestral stocks in Melanesia. The areas of the Moluccas and of Celebes (Malaysia) supplied 21 percent of the birds; the Philippines, 10 percent; Polynesia, 9 percent; and Palearctica, 8 percent. Results of this study show that there may have been only 46 actual colonizations of Micronesia by birds from other areas, and that many of the large number of endemics present have been the result of secondary colonizations within the islands of Micronesia. It is concluded that Micronesia, except for the Marshall Islands, has a much closer affinity to Melanesia than to any other area as regards avifauna. The Marshall Islands may be regarded as a part of the Polynesian Subregion from the viewpoint of avian zoogeography. 5. Endemism in the land birds and fresh-water birds of Micronesia is extreme. Of 104 native, resident birds, 97 (93.5 percent) have become differentiated and can be separated taxonomically from related forms. In Micronesia, there are 5 endemic genera, 31 endemic species, and 76 endemic subspecies. The families containing the greatest number of endemic forms are Muscicapidae (14), Zosteropidae (14), Columbidae (13), and Sturnidae (9). 6. It is concluded that some of the more important factors controlling the dispersal of the bird life to Micronesia are the direction and the intensity of the winds, the small size of the islands, the isolation of the islands (especially those "high" islands), and the insular climates, which appear to favor colonists from tropical homes rather than those from Palearctic homes. 7. The factors most important in the process of differentiation of birds in the islands of Micronesia are isolation, paucity in numbers of individuals, freedom from predation, absence (and presence) of interspecific and intraspecific strife, and nutrition. The importance of the "dilution" factor is discussed, and the possibility of cross-breeding between different kinds of birds is considered. It is concluded that genetic change altering the phenotypic expression of avian characteristics is no more apt to occur in insular populations than in continental populations, but such changes have a greater chance of being perpetuated in insular populations. BIBLIOGRAPHY AMADON, D. 1942. Notes on some non-passerine genera, 1. Amer. Mus. no. 1175:1-11, 1 fig. 1943. Notes on some non-passerine genera, 3. Amer. Mus. Novit., no. 1237:1-22. AUSTIN, O. L., JR. 1948a. Japanese ornithology and mammalogy during World War II. Natural Resources Section, General Headquarters, Supreme Commander Allied Powers. Report No. 102:1-47. 1948b. The birds of Korea. Bull. Mus. Comp. Zool., 101, no. 1:1-301, 1 pl. BAKER, R. H. 1946a. A new race of _Rhipidura rufifrons_ from Rota Island, Mariana Islands. Proc. Biol. Soc. Washington, 55:77-78. 1946b. Some effects of the war on the wildlife of Micronesia. Trans. 11th N. Amer. Wildlife Conf.: 205-213, 3 figs. 1946c. A study of rodent populations on Guam, Mariana Islands. Ecol. Monogr., 16:393-408, 11 figs. 1947a. Observations on the birds of the North Atlantic. Auk, 64:245-259, 5 figs. 1947b. Size of bird populations at Guam, Mariana Islands. Condor, 49:124-125. 1948. Report on collections of birds made by United States Naval Medical Research Unit No. 2 in the Pacific war area. Smithsonian Misc. Coll., 107, no. 13:ii + 74 pp., 6 pls. BEQUAERT, J. C. 1939. Hippoboscidae of the Caroline Islands (including the Palau Group). Mushi, 12:81-82. 1941. The Hippoboscidae of Oceania (Diptera). Occ. Papers Bernice P. Bishop Mus., 16:247-292, 5 figs. BERLIOZ, M. J. 1929. Catalogue systematique des type de la collection d'oiseaux du muséum. Bull. Mus. Hist. Nat., Paris, 2nd Ser., 1:58-69. BOGERT, C. 1937. The distribution and the migration of the long-tailed cuckoo (_Urodynamis taitensis_ Sparrman). Amer. Mus. Novit., no. 933:1-12, 1 map. BOLAU, H. 1898. Die typen der Vogelsammlung des Naturhistorischen Museums zu Hamburg. Mitteil. Naturhist. Mus. Hamburg, 15:47-71. BONAPARTE, C. R. 1850-'57. Conspectus generum avium. 1850, 1:1-543; 1855-57, 2:1-232. BORROR, D. J. 1947. Birds of Agrihan, Auk, 64:415-417. BRIGHAM, W. T. 1900. An index to the islands of the Pacific Ocean. Mem. Bernice P. Bishop Mus., 1, no. 2:1-170, maps. BRYAN, E. H., JR. 1936. Birds of Guam. Guam Recorder [newspaper]. 13, no. 2:14-15, 24-25; no. 3:10; no. 4:14, 30; no. 5:15-16, 30-31; no. 6:14-15, 34; no. 7:18-20, 34-35. 1941. A summary of the Hawaiian birds. Proc. 6th Pacific Sci. Cong., 1939, 4:185-189. BRYAN, E. H., JR., and GREENWAY, J. C., JR. 1944. Contribution to the ornithology of the Hawaiian Islands. Bull. Mus. Comp. Zoöl., 94:80-142. BRYAN, W. A. 1903. A monograph of Marcus Island. Occ. Papers Bernice P. Bishop Mus., 2:77-139. BÜTTIKOFER, J. 1893. A review of the genus _Rhipidura_. Notes Leyden Mus., 15:65-98. BUXTON, P. A. 1938. The formation of species among insects in Samoa and other oceanic islands. Proc. Zool. Soc. London: 264-267. CABANIS, J. 1859-'60. Museum Heineanum. Verzeichniss der Ornithologoschen Sammlung. pt. 2:1-175. CASSIN, J. 1858. United States Exploring Expedition during the years 1838, 1839, 1840, 1841, 1842 under the command of Charles Wiles, U. S. N. Mammalogy and ornithology. Philadelphia, viii + 466 pp. CHAMISSO, A. VON 1821. Remarks and opinions of the naturalist of the expedition, in Kotzebue's Voyage "Rurick," London, 2:351-433; 3:1-318. CHRISTIAN, F. W. 1899. The Caroline Islands, travels in the sea of little islands. Charles Scribner's Sons, New York: xiii + 412 pp., illus. 1926. The megapode bird and the story it tells. Journ. Polynesian Soc., 35:260. CHURCHILL, W. 1911. The peopling of Yap. Bull. Amer. Geogr. Soc., 43:510-518. COX, L. M. _et al._ 1917. The island of Guam. U.S. Govt. Print. Office, Washington, 95 pp., illus., map. CRAM, E. B. 1927. Bird parasites of the nematode suborders Strongylata, Ascaridata and Spirurata. Bull. U.S. Nat. Mus., 140:xvii + 465 pp. CRAMPTON, H. E. 1925. Studies on the variation, distribution and evolution of the genus _Partula_. The species of the Mariana Islands, Guam and Saipan. Publ. Carnegie Inst., Washington, 228A:vi + 116 pp., 14 pls. DARLINGTON, P. J. 1938. The origin of the fauna of the Greater Antilles, with discussion of dispersal of animals over water and through the air. Quart. Rev. Biol., 13:274-300, 5 figs. DELACOUR, J. 1942-'43. The bush-warblers of the genera _Cettia_ and _Bradypterus_, with notes on allied genera and species. Ibis, 84 (1942):509-519; 85 (1943):27-40. 1943. A revision of the subfamily Estrildinae of the family Ploceidae. Zoologica, 28:69-86. 1946. Notes of the taxonomy of the birds of Malaysia. Zoologica, 31:1-8. 1947. Birds of Malaysia. The Macmillan Co., New York, xvi + 382 pp., 84 figs. DELACOUR, J., and MAYR, E. 1945a. The family Anatidae. Wilson Bull., 57:3-55, 24 figs. 1945b. Notes on the taxonomy of the birds of the Philippines. Zoologica, 30:105-117. 1946. Birds of the Philippines. New York, xv + 309 pp., 69 figs., 1 map. DESMAREST, A. G. 1826. _Columba oceanica._ Dict. Sci. Nat., éd. Levrault, Paris, 40:316. DOBZHANSKY, T. G. 1941. Genetics and the origin of species. Columbia Univ. Press, New York, 2d ed., rev., ix + 466 pp., 24 figs. DOWNS, T. 1946. Birds on Tinian in the Marianas. Trans. Kansas Acad. Sci., 49:87-106, 3 figs., 1 map. DUBOIS, A. 1902-'04. Synopsis avium. Nouveau manuel d'ornithologie. Bruxelles, 1 (1899-1902):xv + 1-729, pls. i-xii; 2 (1902-1904):ix + 730-1399, pls. xii-xvi. ELIOTT, D. G. 1878a. The genus _Porphyrio_ and its species. Stray Feathers, 7:6-25. 1878b. On the fruit-pigeons of the genus _Ptilopus_. Proc. Zool. Soc. London: 500-575. FINSCH, O. 1867-'68. Die Papageien. Leiden, 1 (1867):xii + 561 pp.; 2 (1868):vii + 996 pp. 1870. Zur ornithologie der Tonga-Inseln. Journ. f. Ornith., 18:119-140. 1852. Zur ornithologie der Samoa-Inseln. Journ. f. Ornith., 20:30-58. 1875. Zur ornithologie der Südsee-Inseln. 1. Die Vögel der Palau-Gruppe. Journ. Mus. Godeffroy, 8:133-183 (in reprint: 1-51), 5 pls. 1876a. Characters of six new Polynesian birds in the Museum Godeffroy at Hamburg. Proc. Zool. Soc. London for 1875:643-644. 1876b. Zur ornithologie der Südsee-Inseln. II. Ueber neue und weniger grekannte Vögel von Viti-, Samoa- und Carolinen-Inseln. Journ. Mus. Godeffroy, 12:1-41. 1876c. Uber den Schwalbenwürger (_Artamus_) der Palau Inseln. Journ. Mus. Godeffroy, 12:41-42. 1878. On the birds of the island of Ponapé, eastern Carolines. Proc. Zool. Soc. London for 1877:777-782. 1880a. Beobachtungen über die Vögel der Inseln Ponapé (Carolinen). Journ. f. Ornith., 28:283-295. 1880b. Beobachtungen über die Vögel der Inseln Kuschai (Carolinen). Journ. f. Ornith., 28:296-310. 1880c. Ornithological letters from the Pacific, no. II. Taluit (Bonham) Island. Ibis, 4th Ser., 4:218-220. 1880d. Ornithological letters from the Pacific, no. III. Taluit (Bonham) Island. Ibis, 4th Ser., 4:329-333. 1880e. List of the birds of the islands of Ruk in the central Carolines. Proc. Zool. Soc. London: 574-577. 1881a. On two species of pigeons from the Caroline Islands. Proc. Zool. Soc. London for 1880: 577-578. 1881b. Ornithological letters from the Pacific. No. V. Kushai; no. VI. Ponapé. Ibis, 4th Ser., 5:102-115. 1881c. Ornithological letters from the Pacific, no. VII. Nawodo (Pleasant Island). Ibis, 4th Ser., 5:245-249. 1883. On a new reed-warbler from Nawodo or Pleasant Island, in the western Pacific. Ibis, 5th Ser., 1:142-144. 1884. Über Vögel der Südsee. Auf Grund eigener beobachtungen und sammlungen. Mitt. Ornith. Ver. Wien, V. Micronesia: 46-56. 1893a. Ueber die Monasaralle von Kuschai [_Kittlitzia Monasa_ (Kittlitz) und die bisher mit ihr verwechselten Arten]. Mitth. Ornith. Ver. Wien, "Die Schwalbe," 17:1-5. 1893b. Einiges über Südsee-Rallen. Anzeigeblatt Ornith. Monats. des Deut. Ver. z. Schutze der Vogelwelt, 18:457-463. 1900a. Zur catalogisirung der ornithologischen Abtheilung. Notes Leyden Mus., 22:75-125. 1900b. Meine Beobachtungen über Fregattvogel (_Fregata aquila_ L., _F. ariel_ Gould). Anzeigeblatt Ornith. Monats. des Deut. Ver. z. Schutze der Vogelwelt, 25:446-452. 1901. Das Tierreich. no. 15. Zosteropidae. Berlin, xiv + 54 pp., 31 figs. FINSCH, O., and HARTLAUB, G. 1867. Beitrag zur Fauna Centralpolynesiens. Ornithologie der Viti-, Samoa- und Tonga-Inseln. Halle, xl + 290 pp., 14 pl. FISHER, H. I. 1946. The type localities of _Puffinus pacificus cuneatus_ Salvin and _Pterodroma leucoptera hypoleuca_ (Salvin). Auk, 63:587-588. 1947. Utinomi's _Bibliographica Micronesica_: Chordate Sections. Pacific Science, 1, no. 3:129-150. FORBES, W. A. 1879. A synopsis of the Meliphagine genus _Myzomela_, with descriptions of two new species. Proc. Zool. Soc. London: 256-279. GADOW, H. 1884. Catalogue of the Passeriformes or perching birds in the collections of the British Museum. Cinnyrimorphae. 9:xii + 310 pp., 7 pls. GAIMARD, P. J. 1823. Memoire sur un nouveau genre de Gallinaces, establi sous le nom de Megapode. Bull. Gen. et Univ. des Annonces et des Nouvelles Sci., 2:450-451. GIEBEL, C. G. 1872-'77. Thesaurus ornithologiae. Reportorium der gesammten ornithologischen Literatur und Nomenclator sammtlicher Gattungen und Arten der Vögel nebst Synonymem und geographischer Verbreitung. F. A. Brockhaus, Leipzig, 1 (1872):vii + 868 pp.; 2 (1875):vi + 787 pp.; 3 (1877):vi + 861 pp. GLEIZE, D. A. 1945. Birds of Tinian. Bull. Mass. Audubon Soc., 29:220. GLEIZE, D. A., and GENELLY, D. 1945. in With the colors. Bull. Mass. Audubon Soc., 29:221-222. GODMAN, F. 1907-1910. A monograph of the Petrels. Witherby, London, lv + 381 pp., pls. GRÄFFE, E. 1873. Die Carolineninsel Yap oder Guap. Journ. Mus. Godeffroy, 2:84-130 (in reprint 1-58). GRAY, G. R. 1859. Catalogue of the birds of the tropical islands of the Pacific Ocean in the collection of the British Museum. Taylor and Francis, London: 1-72. 1866. A synopsis of the species of the genus _Collocalia_, with descriptions of new species. Ann. and Mag. Nat. Hist., 3d ser., 17:118-128. GRAY, J. E. 1866. Naturalization of _Zosterops dorsalis_ in New Zealand. Ann. and Mag. Nat. Hist., 3d ser., 17:237. GULICK, A. 1932. Biological peculiarities of oceanic islands. Quat. Rev. Biol., 7:405-427. HACHISUKA, M. U. 1931-'35. The birds of the Philippine Islands. Witherby, London, 1 (1931-'32):xx + 439 pp.; 2 (1934-'35):xxxi + 469 pp. 1939a. New races of a rail and a fruit pigeon from Micronesia and Palawan. Bull. British Ornith. Club, 59:151-153. 1939b. The red jungle fowl from the Pacific islands. Tori, 10:596-601. HACHISUKA, M. U., KURODA, N., TAKATSUKASA, N., UCHIDA, S., and YAMASHINA, Y. 1932. A hand-list of the Japanese birds, revised. The Ornith. Soc. of Japan, Tokyo, iv + 211 pp. 1942. A hand-list of Japanese Birds, third revised edition. The Ornith. Soc. of Japan, Tokyo, vii + 238 pp. HARRISON, T. H., and MARSHALL, A. J. 1937. _Aplonis santovestris_, sp. nov. Bull. British Ornith. Club, 57:148-150. HARTERT, E. 1891. Katalog der Vogelsammlung in Museum der Senckenbergischen Naturforschenden Gesselschaft in Frankfurt am Main. Frankfurt am Main, xxii + 259 pp. 1892. in Salvin and Hartert, Catalogue of the Picariae in the collection of the British Museum. Coraciae. 16:434-654, pls. 10-14. 1897. On a new species of _Tephras_ (Zosteropidae) from the Caroline Islands. Bull. British Ornith. Club, 7:5. 1898. On the birds of the Marianne Islands. Novit. Zool., 5:51-69. 1900. The birds of Ruk in the central Carolines. Novit. Zool., 7:1-11. 1903-'22. Die Vögel der paläarktischen Fauna. Berlin, 1 (1910):xlix + 1-832, figs. 1-134; 2 (1912-21):xxiv + 833-1764, figs. 135-256; 3 (1921-22): xii + 1765-2328, figs. 257-268. 1917. On some Rallidae. Novit. Zool. 24:265-274. 1926. Types of birds in the Tring Museum. B. Types in the general collection, VII. Tubinares. Novit. Zool., 33:344-357. 1927. Types of birds in the Tring Museum. B. Types in the general collection, VIII. Columbae-Struthionidae. Novit. Zool., 34:1-38. 1930. List of the birds collected by Ernst Mayr. Novit. Zool., 36:27-128. HARTLAUB, G. 1852. R. Titian Peale's Vögel der "United States Exploring Expedition." Archiv f. Naturg., 18:93-138. 1854. Zur Ornithologie Oceanien's. Journ. f. Ornith., 2:160-170. 1865. Monographischer Versuch über die Gattung _Zosterops_. Journ. f. Ornith., 13:1-30. 1868. On a collection of birds from some less-known localities in the western Pacific. Proc. Zool. Soc. London for 1867:828-832, pl. 38. 1892. Vier selten Rallen. Abh. Nat. Ver. Bremen, 12:389-402. HARTLAUB, G., and FINSCH, O. 1868a. On a collection of birds from the Pelew Islands. Proc. Zool. Soc. London: 4-9, pls. 2-3. 1868b. Additional notes on the ornithology of the Pelew Islands. Proc. Zool. Soc. London: 116-118. 1872. On a fourth collection of birds from the Pelew and Mackenzie islands. Proc. Zool. Soc. London: 87-114. HEDLEY, C. 1899. A zoogeographic scheme for the mid-Pacific. Proc. Linnean Soc. New South Wales, 24:391-417. HESSE, R., ALLEE, N. C., and SCHMIDT, K. P. 1937. Ecological Animal Geography. An authorized, rewritten edition based on Tiergeographie auf oekologischer Grundlage by R. Hesse, prepared by N. C. Alee and K. P. Schmidt. John Wiley & Sons, New York, xiv + 597 pp., 135 figs. HOBBS, W. H. 1945. Fortress islands of the Pacific. J. W. Edwards, Ann Arbor, xiii + 186 pp., 107 figs. HOMBRON, J. B., and JACQUINOT, C. H. 1841. Description de plusieurs oiseaux nouveaux ou peu connus, provenant de l'expedition autour du monde faite sur les corvettes l'Astrolabe et La Zélée. Ann. Sci. Nat., Paris, 2d ser., 16:312-320. HUXLEY, J. S. 1938. Species formation and geographical isolation. Proc. Zool. Soc. London: 253-264. KELSO, L. 1938. An addition to the range of the short-eared owl. Oölogist, 60:138. KIRBY, H., JR. 1925. The Birds of Fanning Island, Central Pacific Ocean. Condor, 27:185-196, figs. 47-54. KITTLITZ, F. H. VON 1832-'33. Kupfertafeln zur Naturgeschichte der Vögel. Frankfurt am Main, parts 1-3:1-28, 36 pls. 1835. Über einige noch unbeschriebene Vögel von der Insel Luzon, den Carolinen und den Marianen. Mém. Acad. Imp. Sci. St. Pétersbourg, 2:1-9, pls. 1-10. 1836. Observations zoologiques faites pendant l'expedition de la corvette Le Séniavine, par F. H. de Kittlitz, in Lutké, Voyage "Le Séniavine," 3:237-330. 1858. Denkwürdigkeiten einer Reise nach dem russischen Amerika, nach Micronesien und durch Kamtschatka. Gotha, 1:383 pp.; 2:463 pp. KRIEGER, H. W. 1943. Island peoples of the western Pacific. Micronesia and Melanesia. Smithson. Inst. Publ. 3737 (War Background Ser. No. 16):iv + 104 pp., 21 pls., 2 maps. KURODA, N. 1922a. Descriptions of two new forms of birds from Pelew Islands, Micronesia. in Momiyama, Birds of Micronesia, pt. 1:25-30. 1922b. A list of the birds of Micronesia Group, exclusive of Magalhaes, Gilbert and Ellice islands. in Momiyama, Birds of Micronesia, pt. 1:31-78. 1925. A contribution to the knowledge of the avifauna of the Riu Kiu Islands and vicinity. publ. by the author, Tokyo, vi + 293 pp., illus. 1932. A revision of the types of birds described by Japanese authors during the years 1923 to 1931. Novit. Zool., 37:384-405. 1941-'42. A study of the Marianas Duck, _Anas oustaleti_. Tori, pt. 1, 11:99-119, 6 pls; pt. 2, 11:443-448, 3 photos. [In Japanese.] LACK, D. L. 1947. Darwin's finches. Cambridge Univ. Press, Cambridge, x + 209 pp., 8 pls., 27 figs. LESSON, R. P. 1828. Manuel d'ornithologie, ou description des genres et des principales espèces d'oiseaux. Paris, 1:iv + 421 pp.; 2:448 pp. 1829. Voyage autour du monde, éxecuté par ordre du Roi, sur la corvette de la Majesté La Coquille. pendant les années 1822, 1823, 1824, et 1825. Zoologie. Paris, 1:iv + 1-360; 2:361-743; Atlas:157 col. pls. 1830-'31. Traité d'ornithologie, ou description des oiseaux réunis dans les principaies collection de France. Paris, xxxii + 659 pp., 119 col. pls. LINSLEY, L. N. 1935. Curious things about Guam: the mountain chicken. Guam Recorder [newspaper], 12:249-250. LISTER, J. J. 1911. The distribution of the avian genus _Megapodius_ in the Pacific islands. Proc. Zool. Soc. London: 749-759, 1 fig. LUTKÉ, F. 1835-'36. Voyage autour de monde, exécuté par ordre de sa majesté l'empereur Nicolas 1, sur la corvette Le Séniaville, dans les années 1826, 1827, 1828, et 1829. Partie historique avec un atlas, lithographié d'aprés les dessins originaux d'Alexandre Postels et du Baron Kittlitz. Didot, Paris, 1 (1835):xxiv + 410 pp.; 2 (1835):387 pp.; 3 (1836):xiv + 352 pp. MCATEE, W. L. (editor) 1945. The ring-necked pheasant and its management in North America. Amer. Wildlife Inst., Washington: xi + 320 pp., 31 pls., 12 figs. MARCHE, A. 1891. Rapport général sur une mission aux îles Mariannes. Nov. Arch. Missions Sci. et Litt., 1:241-280. MARSHALL, J. T., JR. 1949. The endemic avifauna of Saipan, Tinian, Guam and Palau. Condor, 51:200-221, figs. 35-40. MATHEWS, G. M. 1925. _Monarcharses_, gen. nov. Bull. British Ornith. Club, 45:95. 1926. On some changes in names. _Nycticorax caledonicus pelewensis_ subsp. nov. Bull. Brit. Ornith. Club, 46:60. 1927-30. Systema Avium Australasianarum. British Ornith. Union, pt. 1 (1927):1-426; pt. 2 (1930):427-1048. 1931. Additions and corrections to the 'Systema Avium Australasianarum'. Ibis, 13th ser., 1:44-57. 1932. Additions and corrections to the 'Systema Avium Australasianarum'. pt. II. Ibis, 13th ser., 2:132-161. 1933. Additions and corrections to the 'Systema Avium Australasianarum'. pt. III. Ibis, 13th ser., 3:87-97. 1934. A check-list of the order Procellariiformes. Novit. Zool., 39:151-206. 1938. _Aplornis_ versus _Aplonis_. Ibis, 14th ser., 2:342. MATSCHIE, P. 1901. Bermerkungen zur Zoogeographie des westlichen Mikronensiens. Journ. f. Ornith., 49:109-114. MAYR, E. 1931a. Notes on _Halcyon chloris_ and some of its subspecies. Amer. Mus. Novit., no. 469:1-10. 1931b. A systematic list of the birds of Rennell Islands with descriptions of new species and subspecies. Amer. Mus. Novit., no. 486:1-29. 1931c. The parrot finches (genus _Erythrura_). Amer. Mus. Novit., no. 489:1-10. 1931d. Notes on fantails of the genus _Rhipidura_. Amer. Mus. Novit., no. 502:1-21. 1931e. Rhamphozosterops nov. gen. Ornith. Monatsber., 39:182. 1932. Notes on Meliphagidae from Polynesia and the Solomon Islands. Amer. Mus. Novit., no. 516:1-30. 1933a. _Rhamphozosterops_ versus _Cinnyrhyncha_. Ibis, 13th ser., 3:389-390. 1933b. Three new genera from Polynesia and Melanesia. Amer. Mus. Novit., no. 590:1-6, 1 fig. 1933c. Two new birds from Micronesia. Amer. Mus. Novit., no. 609:1-4. 1933d. Notes on Polynesian flycatchers and a revision of the genus _Clythorhynchus_ Elliott. Amer. Mus. Novit., no. 628:1-21. 1933e. Notes on the genera _Myiagra_ and _Mayrornis_. Amer. Mus. Novit., no. 651:1-20. 1933f. Notes on the variation of immature and adult plumages in birds and a physiological explanation of abnormal plumages. Amer. Mus. Novit., no. 666:1-10. 1933g. Die vogelwelt Polynesiens. Mitt. Zool., Mus. Berlin, 19:306-323. 1935. Descriptions of twenty-five new species and subspecies. Amer. Mus. Novit., no. 820:1-6. 1936. Descriptions of twenty-five species and subspecies. Amer. Mus. Novit., no. 828:1-19. 1937. Notes on New Guinea birds I. Amer. Mus. Novit., no. 915:1-19. 1938. Notes on New Guinea birds IV. Amer. Mus. Novit., no. 1006:1-16. 1940. Speciation phenomena in birds. Amer. Nat., 74:249-278, 7 figs. 1941a. Borders and subdivisions of the Polynesian Region based on our knowledge of the distribution of the birds. Proc. 6th Pacific Sci. Cong. 1939, 4:191-195. 1941b. The origin and the history of the bird fauna of Polynesia. Proc. 6th Pacific Sci. Cong., 1939, 4:197-216. 1942a. Notes on the Polynesian species of _Aplonis_. Amer. Mus. Novit., no. 1166:1-6. 1942b. Systematics and the origin of species from the viewpoint of a zoologist. Columbia Univ. Press, New York, xiv + 334 pp., 29 figs. 1943. The zoogeographical position of the Hawaiian Islands. Condor, 45:45-48. 1944a. The birds of Timor and Sumba. Bull. Amer. Mus. Nat. Hist., 83:127-194, 4 figs. 1944b. Notes on some genera from the Southwest Pacific. Amer. Mus. Novit., no. 1269:1-8. 1945a. Birds of the Southwest Pacific. The Macmillan Co., New York, xix + 316 pp., 3 pls., 16 figs., 1 map. 1945b. Bird habitats in the Southwest Pacific. Audubon Mag., 47:207-221, 5 figs. 1945c. Bird conservation problems in the Southwest Pacific. Audubon Mag., 47:279-282, 2 figs. MAYR, E., and AMADON, D. 1941. Geographical variation in _Demigretta sacra_ (Gmelin). Amer. Mus. Novit., no. 1144:1-11, 1 map. MAYR, E., and MOYNIHAN, M. 1946. Evolution in the _Rhipidura rufifrons_ group. Amer. Mus. Novit., no. 1321:1-21, 6 figs. MEARNS, E. A. 1909. A list of birds collected by Dr. Paul Bartsch in the Philippine Islands, Borneo, Guam, and Midway Island, with descriptions of three new forms. Proc. U. S. Nat. Mus., 36:463-478. MEINERTZHAGEN, R. 1926. Introduction to a review of the genus Corvus. Novit. Zool., 33:57-121, 12 pls. MERRILL, E. D. 1945. Plant life of the Pacific world. Fighting Forces Ed., The Infantry Journal, Washington, xviii + 298 pp., 256 figs. 1947. A botanical bibliography of the islands of the Pacific. Contr. U. S. Nat. Herb., 30, pt. 1:i-v, 1-322. MOMIYAMA, T. T. 1920. Description of a new subspecies of _Aplonis_ from the islands of the western Micronesia. Tori, 2:1-3. 1922. Birds of Micronesia. Descriptions of two new genera and nine new subspecies of birds from Micronesia. The Ornith. Soc. Japan, pt. 1:1-24. 1930. On the birds of Bonin and Iwô Islands. Annot. Ornith. Orientalis. 2:1-186. MORAN, J. V. 1946. Birds of Saipan and Tinian. Bull. Mass. Audubon Soc., 30:261-262 MURPHY, R. C. 1927. On certain forms of _Puffinus assimilis_ and its allies. Amer. Mus. Novit., no. 276:1-15, 1 fig. 1929. On _Pterodroma cooki_ and its allies. Amer. Mus. Novit., no. 370:1-17, 1 fig. 1936. Oceanic birds of South America. Amer. Mus. Nat. Hist., New York, 1:i-xxii + 1-640, 5 col. pls. (unnumbered), numbered pls. 1-38, figs. 1-61; 2:641-1245, 10 col. pls. (unnumbered), numbered pls. 39-42, figs. 62-80. 1938. The need of insular exploration as illustrated by birds. Science, 88:533-539, 2 figs. MURPHY, R. C., and MATHEWS, G. M. 1929. Birds collected during the Whitney South Sea Expedition. VI. Amer. Mus. Novit., no. 350:1-21, 1 fig. NEHRKORN, A. 1879. Mittheilungen über Nester und Eier des Museums Godeffroy zu Hamburg. Journ. f. Ornith., 27:393-410. 1899. Katalog der Eiersammlung. Braunschweig, vii + 256 pp. NELSON, E. W. 1921. The importance of systematic exploration of the land fauna of islands in the Pacific. Proc. 1st Pan-Pacific Sci. Conf., Honolulu, 1920:265-276. NEUMANN, O. 1922. Neue Formen aus dem papuanischen und polynesischen Inselreich. Verh. Ornith. Ges. Bayern, 25:234-238. OBERHOLSER, H. C. 1906. A monograph of the genus _Collocalia_. Proc. Acad. Nat. Sci. Phila., 58:177-212. 1912. A revision of the forms of the edible-nest swiftlet, _Collocalia fuciphaga_ (Thumberg). Proc. U. S. Nat. Mus., 42:11-20. 1915. A synopsis of the races of the crested tern, _Thalasseus bergii_ (Lichtenstein). Proc. U. S. Nat. Mus., 49:515-526, pl. 66. 1917. The birds of the Anamba Islands. Bull. U. S. Nat. Mus., 98:v + 75 pp., 2 pls. 1919. A revision of the subspecies of the white-collared kingfisher, _Sauropatis chloris_ (Boddaert). Proc. U. S. Nat. Mus., 55:351-395. OGILVIE-GRANT, W. R. 1893. Catalogue of the game birds in the collection of the British Museum. 22:xvi + 585, 8 pls. 1898. In Sharpe and Ogilvie-Grant, Catalogue of the Plataleae, Herodiones. Steganopodes, Pygopodes, Alcae, and Impennes in the collection of the British Museum. 26:329-653, pls. 5-8. OLIVER, W. R. B. 1930. New Zealand birds. Fine Arts Ltd., Wellington, viii + 541 pp., illus. OUSTALET, M. E. 1881a. Observations sur divers oiseaux de l'Asie et de la Nouvelle-Guinée. Bull. Soc. Philom. de Paris, ser. 7, 5:71-80. 1881b. Monographie des oiseaux de la familie des Mégapodiidés. III. Description des genres et speces. Ann. Sci. Nat., Zool., ser. 6, 9:1-182. 1889. Sur la faune ornithologique des Iles Mariannes. Le Naturaliste, ser. 2, 3:260-261. 1891. Note sur las mégapode de la Pérouse. Ann Sci. Nat. Zool., Paris, 17th ser., 11:196. 1895-'96. Les mammifères et les oiseaux des Iles Mariannes. Nouv. Arch. Mus. Hist. Nat. Paris, ser. 3, 7 (1895):141-228, 7 pls.; 8 (1896):24-74. PELZELN, A. VON 1865. Reise de östereichischen Fregatte Novara um die Erde in de Jahren 1857, 1858, 1859, unter den Befehlen des Commodure B. von Wüllerstorf-Urbair, 1, pt. 2, Vögel. Vienna, iv + 176 pp., 6 pls. PETERS, J. L. 1930. Notes on some night herons. Proc. Boston Soc. Nat. Hist., 39:266-277. 1931-'45. Check-list of the birds of the World. Harvard Univ. Press, Cambridge, 1 (1931):xviii + 345 pp.; 2 (1934):xvii + 401 pp.; 3 (1937):xiii + 311 pp.; 4 (1940):xii + 291; 5 (1945):xi + 306. PETERS, J. L., and GRISCOM, L. 1928. A new rail and a new dove from Micronesia. Proc. New England Zoöl. Club, 10:99-106. PHILLIPS, J. C. 1923. A natural history of the ducks. Houghton Mifflin Co., Boston and New York, 2:xii + 409 pp., 26 pls., 38 maps. PRICE, W. 1936a. The South Sea adventure. The Hokuseido Press, Tokyo, xiv + 313, illus. 1936b. Mysterious Micronesia, Yap, Map and other islands under the Japanese Mandate, etc. Nat. Geogr. Mag., 69:481-510. PROWAZEK, S. VON 1913. Die deutschen Marianen. Leipzig, 125 pp. PUCHERAN, J. 1853. Voyage au Pôle Sud et dans l'Océanie, sur les corvettes l'Astrolabe et la Zélée, exécuté par ordre du Roi, pendant les années 1837-40. Paris. vol. III, Zoologie, Mammiferes et Oiseaux: 1-166. QUINN, J. 1946. Pheasants flown to Guam. Calif. Fish and Game, 32:32-33. QUOY, J. R. C., and GAIMARD, P. J. 1824-'26. Voyage autour du monde. Entepres par ordre du Roi. Exécuté sur les corvettes de S. M. l'Uranie et la Physicienne, pendant les années 1817, 1818, 1819, et 1820. Par M. Louis de Freycinet, Capitaine de Vaisseau. Paris, Zoologie: 712 pp., Atlas: 96 pls. 1825. Notice sur les mammifères et les oiseaux des îles Timor, Rawak, Boni, Vaigiou, Guam, Rota et Tinian. Ann. Sci. Nat. Zool., 6:138-150. 1830-'35. Voyage de decouvertes de la corvette l'Astrolabe, exécuté par ordre du Roi, pendant les années 1826, 1827, 1828, et 1829 sous le commandement de M. J. Dumont D'Urville. Paris, Zoologie:xlx + 268 pp. REICHENOW, A. 1885. Bericht über die Januar-Sitzung. Journ. f. Ornith., 33:108-110. 1899. Aufzeichnung. (Vogelzug auf der Marschall Inseln.) Ornith. Monatsber., 7:41. 1901. Eine auffallende Vogelzustrasse vom nordwestlichen Nordamerika nach Polynesien. Ornith. Monatsber., 9:17-18. 1902. Vögel von Nauru. Journ. f. Ornith., 50:254-257. 1913-'14. Die Vögel. Handbuch der systematischen Ornithologie. Stuttgart, 1 (1913):viii + 529 pp.; 2 (1914):viii + 628 pp. 1915. Neue Arten. Journ. f. Ornith., 63:124-129. REICHENOW, A., and SCHALOW, H. 1881. Compendium der neu beschriebenen Gattungen und Arten. Journ. f. Ornith., 29:70-102. REID, C. F. 1939. Bibliography of the island of Guam. The H. W. Wilson Co., New York, 109 pp. RENSCH, B. 1938. Some problems of geographical variation and species-formation. Proc. Linnean Soc. London: 275-285. RIDGWAY, R. 1882. Description of a new owl from Porto Rico. Proc. U. S. Nat. Mus., 4:366-371. 1912. Color standards and color nomenclature. Published by the author, Washington, D. C.: iii + 43 pp., 53 pls. 1919. The Birds of North and Middle America. Bull. U. S. Nat. Mus., 50, pt. VIII: xvi + 852 pp., 34 pls. RIPLEY, S. D. 1944. The bird fauna of the West Sumatra Islands. Bull. Mus. Comp. Zoöl., 94:305-430, 2 pls. 1948. First record of Anhingidae in Micronesia, Auk, 65:454-455. RIPLEY, S. D., and BIRCKHEAD, H. 1942. On the fruit-pigeons of the _Ptilinopus purpuratus_ group. Amer. Mus. Novit., no. 1192:1-14. ROTHSCHILD, W. 1893-1900. The avifauna of Laysan and the neighbouring islands: with a complete history to date of the birds of the Hawaiian possessions. London: 34 + 320 + 21 pp., 83 col. pls. 1904. New species of kingfishers from Bougainville Island, Solomon Archipelago and Asuncion Island, N. Mariannes. Bull. British Ornith. Club, 15:5-7. RUTLAND, J. 1896. Traces of civilization: An inquiry into the history of the Pacific. Trans. and Proc. New Zealand Inst., 29:1-51. SAFFORD, W. E. 1902. Birds of the Marianne Islands and their vernacular names. Osprey, 6:39-42 and 65-70. 1902-'04. Extracts from the note-book of a naturalist on the island of Guam. I-XXV. The Plant World, 5 (1902):161-168, 193-198; 6 (1903):25-32, 49-54, 73-78, 97-103, 123-130, 147-153, 173-179, 205-211, 232-237, 257-262, 278-284; 7 (1904):1-8, 25-31, 53-60, 81-87, 113-118, 141-146, 163-169, 189-195, 213-220, 237-245, 261-268, 286-298. 1903. Guam and its people. Amer. Anthro., (n. s.), 4:707-729, pls. 27-30. 1905. The useful plants of the island of Guam. Contr. U. S. Nat. Herb., 9:416 pp., 69 pls., 1 map. SALVADORI, T. 1879. Di alcune specie del genere _Porphyrio_ Brisson. Atti della Reale Accad. delle Sci. di Torino. 14:1165-1170. 1880-'89. Ornithologia della Papuasia e delle Molucche. Turin, 1 (1880):xi + 573 pp.; 2 (1881):xvi + 705 pp.; 3 (1882):xv + 595 pp.; suppl. (1889):244 pp. 1894. _Anas oustaleti_, n. sp. Bull. British Ornith. Club, 20:1. 1895. Catalogue of the Chenomorphe, Crypturi and Ratitae in the collection of the British Museum. 27:xv + 636 pp., 19 pls. SALVIN, O. 1888. Critical notes on the Procellariidae. Ibis, 3d ser., 6:351-360. 1896. In Saunders and Salvin, Catalogue of the Gaviae and Tubinares in the British Museum. 25:340-475, 8 pls. SAUNDERS, H. and SALVIN, O. 1896. Catalogue of the Gaviae and Tubinares in the collection of the British Museum. 25:1-339, 1 pl. SCHMELTZ, J. D. E., and KRAUSE, R. 1881. Ein Beitrag Zur Kunde der Südsee-Völker. Die Ethnographische-Anthropologische Abth. Mus. Godeffroy in Hamburg. L. Friederichsen & Co., Hamburg; xxxii + 687 pp., 46 pls., 1 map. SCHNEE, P. VON 1901. Eine auffallende Vogelzustrasse vom nordwestlichen Nordamerika nach Polynesien. Ornith. Monatsber., 9:131-132. 1904. Die Landfauna der Marshall-Inseln. Zool. Jahrbüch., 20:387-412. 1912. Einiges über die höhere Tierwelt der Marianen. Zeits. Naturwiss., Leipzig, 82:458-470. SEALE, A. 1901. Report of a mission to Guam. Occ. Papers Bernice P. Bishop Mus., 1:17-128. SEEBOHM, H. 1881. Catalogue of the Passeriformes, or perching birds, in the collection of the British Museum. Cichlomorphae, part II. Turdidae. 5:xvi + 426 pp., 18 pls. 1891. On the birds of the Volcano Islands. Ibis, 6th ser., 3:109-194. SEMPER, K. 1881. Animal life as affected by the natural causes of existence. D. Appleton & Co., New York, xvi + 472 pp., illus. SHARPE, R. B. 1876. Contributions to the ornithology of Borneo. Pt. I. Ibis, pp. 29-52. 1879. Catalogue of the Passeriformes, or perching birds, in the collection of the British Museum. Cichlomorphae, part I. 4:xvi + 494 pp., 14 pls. 1881. Catalogue of the Passeriformes, or perching birds, in the collection of the British Museum. Cichlomorphae, part III. Timeliidae. 6:xiii + 420 pp., 18 pls. 1883. Catalogue of the Passeriformes, or perching birds, in the collection of the British Museum. Cichlomorphae, part IV. Timeliidae. 7:xvi + 698 pp., 15 pls. 1890. Catalogue of the Passeriformes, or perching birds, in the collection of the British Museum. Sturniformes. 13:xvi + 701 pp., 15 pls. 1892. _Aphanolimnas_, n. gen. Bull. British Ornith. Club, 1:19-20. 1894. Catalogue of the Fulicariae and Alectorides in the collection of the British Museum. 23:xiii + 353 pp., 9 pls. 1896. Catalogue of the Liminolae in the collection of the British Museum. 24:xii + 794 pp., 7 pls. 1898. in Sharpe and Ogilvie-Grant, Catalogue of the Plataleae, Herodiones, Steganopodes, Pygopodes, Alcae, and Impennes in the collection of the British Museum. 26:1-328, pls. 1-4. SHARPE, R. B., and OGILVIE-GRANT, W. R. 1892. Catalogue of the Picariae in the collection of the British Museum. Coraciae (cont.) and Halcyones. 17:1-346 pp., pls. 1-12. STEARNS, H. T. 1946. An integration of coral-reef hypotheses. Amer. Journ. Sci., 244:245-262. STICKNEY, E. H. 1943. Northern shore birds in the Pacific. Amer. Mus. Novit., no. 1248:1-9, 1 fig. STROPHLET, J. J. 1946. Birds of Guam. Auk, 63:534-540. STOTT, K., JR. 1947. Notes on Saipan birds. Auk, 64:523-527. STRESEMANN, E. 1913. Ornithologische Miszellen aus dem indo-australischen Gebiet. Novit. Zool., 20:289-324. 1930. _Megazosterops_ novum genus Zosteropidarum. Ornith. Monatsber., 38:159. 1931a. Die Zosteropiden der indo-australischen Region. Mitt. Zool. Mus. Berlin, 17:201-238. 1931b. Notes on the swiftlets and distribution of some swiftlets (_Collocalia_) of Malaysia and adjacent subregions. Bull. Raffles Mus., 6:83-191. 1939a. "_Heterogynie_" im Rassenkreis _Edolisoma morio_. Ornith. Monatsber., 49:124-126. 1939-41. Die Vögel von Celebes. Journ. f. Ornith, (1939b):299-425; (1940):1-135, 389-487; (1941):1-102. SWARTH, H. S. 1931. The avifauna of the Galápagos Islands. Occ. Papers Calif. Acad. Sci., 18:1-299, map. 1934. The bird fauna of the Galápagos Islands in relation to species formation. Biol. Rev., 9:213-234. TAKATSUKASA, N. 1932-38. The birds of Nippon. 1, pts. 1-7 (Aug. 15, 1932; Nov. 10, 1938) incompleted serial. TAKATSUKASA, S., and KURODA, N. 1915a. A list of birds collected in the North Pacific islands by the Ornithological Society of Japan. Tori, 1:49-55. 1915b. A table of birds known at present from the various islands and island-groups of western Pacific, formerly belonging to Germany but now occupied by Japan. Tori, 1:60-64. TAKATSUKASA, S., and YAMASHINA, Y. 1931a. On _Aplornis opaca orii_ subsp. nov. from the Palau Islands. Dobutsu. Zasshi, 43:458-459. 1931b. Some new birds from the Palau and Mariana Islands. Dobutsu. Zasshi, 43:484-487. 1931c. On two new birds from the Caroline Islands. Dobutsu. Zasshi, 43:599-600. 1931d. On two new forms of the Micronesian birds. Tori, 7:109-110. 1932. Second report on the birds of the South Sea. Dobutsu. Zasshi, 44:221-226. TOWNSEND, C. H., and WETMORE, A. 1919. Reports on the scientific results of the expedition to the tropical Pacific in charge of Alexander Agassiz, on the US Fish Commission steamer "Albatross" from August, 1899, to March, 1900, Commander Jefferson F. Moser, USN, commanding. XXI. The birds. Bull. Mus Comp. Zoöl., 63:151-225. TRISTRAM, H. B. 1883. On the position of the Acrocephaline genus _Tatare_, with descriptions of the two new species of the genus _Acrocephalus_. Ibis, 5th ser., 1:38-46, pls. 1-2. 1889. Catalogue of a collection of birds belonging to H. B. Tristram. Durham, xvi + 278 pp. UCHIDA, S. 1918. Mallophaga from birds of the Ponapé I. (Carolines) and the Palau Is. (Micronesia). Annot. Zool. Japon., 9:480-493. UNITED STATES NAVY DEPARTMENT 1943. Military Government Handbook. Marshall Islands. Office Chief Naval Operations, U. S. Navy Dept., Washington, OPNAV 50E--1:113 pp., 1 map. 1944a. Civil Affairs Handbook. East Caroline Islands (published as a restricted publication, February 21, 1944; unclassified May 2, 1945). Office Chief Naval Operations, U. S. Navy Dept., Washington, OPNAV 50E--5:213 pp., 43 figs., 1 map. 1944b. Civil Affairs Handbook. West Caroline Islands. Office Chief Naval Operations, U. S. Navy Dept., Washington, OPNAV 50E-7:222 pp., 40 figs., 1 map. 1944c. Civil Affairs Handbook. Mandated Marianas Islands. Office Chief Naval Operations, U. S. Navy Dept., Washington, OPNAV 50E-8:205 pp., 26 figs., 1 map. WALLACE, A. R. 1876. The geographical distribution of animals. Harper and Brothers, New York, 1:xxi + 503 pp., 13 pls., 5 maps. 1881. Island life. Harper and Brothers, New York:xvi + 522 pp., illus., 3 maps. WATSON, R. J. 1946. Bird notes from Guam. The Raven, 17:40-42. WHEELER, J. 1900. Report on the island of Guam. Adjutant-General's Office, War Dept., no. 28:1-51. WETMORE, A. 1917. A new honey-eater from the Marianne Islands. Proc. Biol. Soc. Washington, 30:117-118. 1940. A systematic classification for the birds of the world. Smithsonian Misc. Coll., 99, no. 7:1-11. WHARTON, G. W. 1946. Observations on _Ascoschongastia indica_ (Hirst 1915). Ecol. Monogr., 16:151-184, 24 figs. WHARTON, G. W., and HARDCASTLE, A. B. 1946. The genus _Neoschöngastia_ (Acarinida: Trombiculidae) in the western Pacific area. Journ. Parasit., 32:286-322. WIGLESWORTH, L. W. 1891a. Aves Polynesiae. A catalogue of the birds of the Polynesian Subregion. Abhandl. und Ber. Zool. Mus. Dresden, no. 6 (1890-1891): vi + 92 pp. 1891b. On the Polynesian members of the genus _Ptilopus_. Ibis, 6th ser., 3:566-584. 1893. Remarks on the birds of the Gilbert Islands. Ibis, 6th ser., 5:210-215. WILSON, H. 1788. An account of the Pelew Islands, situated in the western part of the Pacific Ocean, composed from the journals and communications of Captain Henry Wilson and some of his officers, who, in August, 1783, were there shipwrecked, in the Antelope, a packet belonging to the honourable East India Company, compiled by George Keate. 2d ed., London:xxvii + 378 pp., illus. WRIGHT, S. 1931. Evolution in Mendelian populations. Genetics, 16:97-159, 21 figs. WYNNE-EDWARDS, V. C. 1935. On the habits and distribution of birds on the North Atlantic. Proc. Boston Soc. Nat. Hist., 40:233-346, pls. 3-5. YAMADA, Y. 1926. The phyto-geographical relation between the Chlorophyceas of the Mariannes, Carolines and Marshall Islands and those of the Malay Archipelago, Australia and Japan. Proc. 3d Pan-Pacific Congr., Tokyo, 1:964-966. YAMASHINA, Y. 1932a. On a collection of birds' eggs from Micronesia. Tori, 7:393-413. 1932b. On the distribution of the birds in Micronesia. Bull. Biogeogr. Soc. Japan, 3:139-148, pls. 8-12. 1938. A new genus of the owl. Tori, 10:1-2. 1940. Some additions to the "List of the birds of Micronesia." Tori, 10:673-679. 1942. A new subspecies of _Conopoderas luscinia_ from the Mariana Islands. Bull. Biogeogr. Soc. Japan, 12:81-83, 1 fig. 1948. Notes on the Marianas Mallard. Pacific Science, 2:121-124. _Transmitted July 28, 1949._ [Illustration: union stamp] 22-8131 UNIVERSITY OF KANSAS PUBLICATIONS The University of Kansas Publications, Museum of Natural History, are offered in exchange for the publications of learned societies and institutions, universities and libraries. For exchanges and information, address the EXCHANGE DESK, UNIVERSITY OF KANSAS LIBRARY, LAWRENCE, KANSAS, U. S. A. MUSEUM OF NATURAL HISTORY.--E. Raymond Hall, Chairman, Editorial Committee. This series contains contributions from the Museum of Natural History. Cited as Univ. Kans. Publ., Mus. Nat. Hist. Vol. 1. 1. The pocket gophers (genus Thomomys) of Utah. By Stephen D. Durrant. Pp. 1-82, 1 figure in text. August 15, 1946. 2. The systematic status of Eumeces pluvialis Cope, and noteworthy records of other amphibians and reptiles from Kansas and Oklahoma. By Hobart M. Smith. Pp. 85-89. August 15, 1946. 3. The tadpoles of Bufo cognatus Say. By Hobart M. Smith. Pp. 93-96, 1 figure in text. August 15, 1946. 4. Hybridization between two species of garter snakes. By Hobart M. Smith. Pp. 97-100. August 15, 1946. 5. Selected records of reptiles and amphibians from Kansas. By John Breukelman and Hobart M. Smith. Pp. 101-112. August 15, 1946. 6. Kyphosis and other variations in soft-shelled turtles. By Hobart M. Smith. Pp. 117-124. July 7, 1947. 7. Natural history of the prairie vole (Mammalian genus Microtus). By E. W. Jameson, Jr. Pp. 125-151, 4 figures in text. October 6, 1947. 8. The postnatal development of two broods of great horned owls (Bubo virginianus). By Donald F. Hoffmeister and Henry W. Setzer. Pp. 157-173, 5 figures in text. October 6, 1947. 9. Additions to the list of the birds of Louisiana. By George H. Lowery, Jr. Pp. 177-192. November 7, 1947. 10. A check-list of the birds of Idaho. By M. Dale Arvey. Pp. 193-216. November 29, 1947. 11. Subspeciation in pocket gophers of Kansas. By Bernardo Villa-R. and E. Raymond Hall. Pp. 217-236, 2 figures in text. November 29, 1947. 12. A new bat (Genus Myotis) from Mexico. By Walter W. Dalquest and E. Raymond Hall. Pp. 237-244, 6 figures in text. December 10, 1947. 13. Tadarida femorosacca (Merriam) in Tamaulipas, Mexico. By Walter W. Dalquest and E. Raymond Hall. Pp. 245-248, 1 figure in text. December 10, 1947. 14. A new pocket gopher (Thomomys) and a new spiny pocket mouse (Liomys) from Michoacán, Mexico. By E. Raymond Hall and Bernardo Villa-R. Pp. 249-256, 6 figures in text. July 26, 1948. 15. A new hylid frog from eastern Mexico. By Edward H. Taylor. Pp. 257-264, 1 figure in text. August 16, 1948. (Continued on inside of back cover.) (Continued from inside of front cover.) 16. A new extinct emydid turtle from the Lower Pliocene of Oklahoma. By Edwin C. Galbreath. Pp. 265-280, 1 plate. August 16, 1948. 17. Pliocene and Pleistocene records of fossil turtles from western Kansas and Oklahoma. By Edwin C. Galbreath. Pp. 281-284, 1 figure in text. August 16, 1948. 18. A new species of heteromyid rodent from the Middle Oligocene of northeastern Colorado with remarks on the skull. By Edwin C. Galbreath. Pp. 285-300, 2 plates. August 16, 1948. 19. Speciation in the Brazilian spiny rats (Genus Proechimys, Family Echimyidae). By João Moojen. Pp. 301-406, 140 figures in text. December 10, 1948. 20. Three new beavers from Utah. By Stephen D. Durrant and Harold S. Crane. Pp. 407-417, 7 figures in text. December 24, 1948. 21. Two new meadow mice from Michoacán Mexico. By E. Raymond Hall. Pp. 423-427, 6 figures in text. December 24, 1948. 22. An annotated check list of the mammals of Michoacán, Mexico. By E. Raymond Hall and Bernardo Villa-R. Pp. 431-472, 5 figures in text. December 27, 1949. 23. Subspeciation in the kangaroo rat, Dipodomys ordii. By Henry W. Setzer. Pp. 473-573, 27 figures in text. December 27, 1949. 24. Geographic range of the hooded skunk, Mephitis macroura, with description of a new subspecies from Mexico. By E. Raymond Hall and Walter W. Dalquest, Pp. 575-580, 1 figure in text. January 20, 1950. 25. Pipistrellus cinnamomeus Miller 1902 referred to the genus Myotis. By E. Raymond Hall and Walter W. Dalquest. Pp. 581-590, 5 figures in text. January 20, 1950. 26. A synopsis of the American bats of the genus Pipistrellus. By E. Raymond Hall and Walter W. Dalquest. Pp. 591-602, 1 figure in text. January 20, 1950. Index, Pp. 605-638. Vol. 2. (Complete) Mammals of Washington. By Walter W. Dalquest. Pp. 1-444, 140 figures in text. April 9, 1948. Vol. 3. 1. The avifauna of Micronesia, its origin, evolution, and distribution. By Rollin H. Baker. Pp. 1-359, 16 figures in text. June 12, 1951. Transcriber's Note(s): - moved first part of 'UNIVERSITY OF KANSAS PUBLICATIONS' to end of e-book. *** END OF THE PROJECT GUTENBERG EBOOK THE AVIFAUNA OF MICRONESIA, ITS ORIGIN, EVOLUTION, AND DISTRIBUTION *** Updated editions will replace the previous one—the old editions will be renamed. Creating the works from print editions not protected by U.S. copyright law means that no one owns a United States copyright in these works, so the Foundation (and you!) can copy and distribute it in the United States without permission and without paying copyright royalties. Special rules, set forth in the General Terms of Use part of this license, apply to copying and distributing Project Gutenberg™ electronic works to protect the PROJECT GUTENBERG™ concept and trademark. Project Gutenberg is a registered trademark, and may not be used if you charge for an eBook, except by following the terms of the trademark license, including paying royalties for use of the Project Gutenberg trademark. 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