1111. Hierococcyx nanus.
The Small Hawk-Cuckoo.
Hierococcyx nanus, Hume, S. F. v, p. 490 ; id. Cat. no. 205 bis; Hume & Dav. S. F. vi, pp. 157, 502; A. Mull. J. f. Orn. 1882, p. 405 ; Oates, B. B. ii, p. 110; Sharpe, Ibis, 1890, p. 11; Shelley, Cat. B. M. xix, p. 238.
Coloration. Head above and nape dark brown to blackish ashy. A well-marked dark grey stripe from the anterior lower border of the eye down the cheek, separated by the whitish lower ear-coverts from the dark grey side of the head behind the eye; above this again, better marked in some specimens than in others, a line of white or rufous feathers forms a border to the crown ; a rufescent collar round the hind-neck ; rest of upper parts brown, more or less barred with rufous ; quills with large bars of buff on inner webs, the whole inner webs near the base rufescent buff. Tail greyish brown, tipped white and with equidistant black bands, the last the broadest, the others subequal. Lower surface rufescent white, with dark brown shaft-stripes.
It is doubtful whether the adult is known, the plumage above described resembling the immature dress of other species.
Upper mandible and tip of lower dull black; lower mandible and base of upper greenish yellow; irides brown; eyelids, legs, feet, and claws orange-yellow (Davison).
Length about 11; tail 5.5; wing 5.7; tarsus .8; bill from gape 1.1.
Distribution. Only known from South Tenasserim, the island of Salanga (Junk Ceylon) and Northern Borneo.