Geographic range.—Breeds in northwestern Asia and Japan. Winters south to Malaysia. In Micronesia: Palau Islands—Koror.
Remarks.—The Chinese Gray-spotted Flycatcher is a casual winter visitor to the Palaus. Marshall (1949:221) took two specimens at Palau on November, 1945.
Colluricincla tenebrosa (Hartlaub and Finsch)
Palau Morning Bird
Rectes tenebrosus Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 6. (Type locality, Pelew Islands.)
Rectes tenebrosus Hartlaub and Finsch, Proc. Zool. Soc. London, 1868, p. 118 (Pelew Islands); idem, Proc. Zool. Soc. London, 1872, pp. 89, 99 (Pelew); Finsch, Journ. Mus. Godeffroy, 8, 1875, pp. 4, 18, pl. 3, fig. 1 (Palau); Schmeltz and Krause, Ethnogr. Abth. Mus. Godeffroy, 1881, p. 407 (Palau); Wiglesworth, Abhandl. und Ber. Zool. Mus. Dresden, no. 6, 1890-1891 (1891), p. 27 (Pelew).
Colluricincla tenebrosa Gray, Hand-list Birds, 1, 1869, p. 386 (Pelew); Dubois, Syn. Avium, 1, 1902, p. 496 (Pelew); Mayr, Amer. Mus. Novit., no. 1269, 1944, p. 5 (Palau); idem, Birds Southwest Pacific, 1945, p. 297 (Palau); Baker, Smithson. Misc. Coll., vol. 107, no. 15, 1948, p. 69 (Peleliu, Ngabad, Garakayo).
Pinarolestes tenebrosus Sharpe, Cat. Birds British Mus., 3, 1877, p. 298 (Pelew); Matschie, Journ. f. Ornith., 1901, p. 112 (Palau); Reichenow, Die Vögel, 2, 1914, p. 296 (Palau); Takasukasa and Kuroda, Tori, 1, 1915, p. 54 (Pelew); Kuroda, in Momiyama, Birds Micronesia, 1922, p. 69 (Pelew); Hand-list Japanese Birds, rev., 1932, p. 174 (Palau).
Myiolestes tenebrosus Tristram, Cat. Birds, 1899, p. 188 (Pelew).