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.