635. Hydrocichla frontalis.
The White-crowned Forktail.
Enicurus frontalis, Blyth, J. A. S. B. xvi, p. 156 (1847) ; id. Cat. p. 150; Horsf. & M. Cat. i, p. 346. Henicurus frontalis, Blyth, Elwes, Ibis, 1872, p. 259, pl. ix; Oates, S. F. v, p. 248 ; Tweedd. Ibis, 1877, p. 310 ; Hume & Dav. S. F. vi, p. 360 ; Hume, Cat. no. 584 quat. Hydrocichla frontalis (Blyth), Sharpe,Cat. B. M. vii, p. 321; Oates, B. B. i, p. 29.
Coloration. Forehead and front of crown white; head, neck, breast, back, lesser and median wing-coverts, primary-coverts and winglet black; scapulars and greater wing-coverts black, tipped with white ; primaries black; secondaries and tertiaries black, with broad white bases ; rump and upper tail-coverts, abdomen, and under tail-coverts white; the two outer pairs of tail-feathers white, the others black with white bases and tips.
The youngest bird I have been able to examine has the whole head, neck, back, and breast dusky brown, with no trace of white on the forehead or crown. Nestling birds will, no doubt, prove to be spotted as in the other species.
Bill black ; legs flesh-colour.
Length nearly 8; tail 3.6; wing 3.6; tarsus 1.1; bill from gape .95.
Distribution. The extreme south of Tenasserim, extending down the Malay peninsula to Sumatra and Borneo.