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
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.