- Chibia worcesteri McGregor, Bur. Govt. Laboratories (1905), 34, 26; McGregor and Worcester, Hand-List (1906), 107.
Semirara (Worcester).
Male.—Similar to Chibia cuyensis and to C. palawanensis, but with the outermost rectrices more recurved than in either of these; wing longer than in C. cuyensis; bill longer and deeper than in C. palawanensis. The type and only specimen measures: Length, 292; wing, 150; tail, 136; bill from nostril, 22; depth of bill at nostril, 11; tarsus, 24; difference in length between the middle and outermost rectrices, 20.
723. CHIBIA BORNEENSIS Sharpe.
BORNEAN DRONGO.
- Chibia borneensis Sharpe, Proc. Zool. Soc. (1879), 246; Worcester and Bourns, Proc. U. S. Nat. Mus. Wash. (1898), 20, 558, no. 298; McGregor and Worcester, Hand-List (1906), 107.
- Chibia pectoralis Guillemard, Proc. Zool. Soc. (1885), 259, 418.
- Chibia cagayanensis Mearns, Proc. U. S. Nat. Mus. (1909), 36, 447.[99]
Bongao (Everett); Cagayan Sulu (Guillemard, Mearns); Sibutu (Everett); Tawi Tawi (Bourns & Worcester). Borneo.
Similar to C. pectoralis (Sula Island), “but it may be recognized on comparison by the much smaller and more metallic spots on the throat and fore neck, which are steel-green, as also are the neck-hackles. In C. pectoralis the spangles are large, dull, and inclined to purplish in tint. This species appears to me to be a thorough Chibia. * * *.” (Sharpe.)
“The young bird from Kina Balu differs from the adult in being duller black, with fewer and less metallic chest-spots and hackles.” (Sharpe.)[100]
“Guillemard thought his Cagayan Sulu specimens to be of the same species with those from Sulu, though he mentions the lack of frontal plumes in the former. Dr. Sharpe has shown that the Sulu-Tawi Tawi birds must be referred to C. borneensis, and if Guillemard was right in believing the Cagayan Sulu birds to be identical with those from Sulu, C. pectoralis must be excluded from the list of Philippine birds.