The Avifauna of Micronesia, Its Origin, Evolution, and Distribution

by Rollin H. Baker

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.