_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).