_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