1215. Spizaetus albiniger.
Nisaetus alboniger, Blyth, J. A. S. B. xiv, p. 178 (1845). Spizaetus alboniger, Blyth, Cat. p. 26; id. J. A. S. B. xix, p. 335; Sharpe, Cat. B. M. i, p. 271; Blyth, Birds Burm. p. 63; Hume & Dav. S. F. vi, p. 12 ; Oates, B. B. ii, p. 191. Limnaetus alboniger, Hume, Cat. no. 34 ter.
Coloration. Adult. Above black, growing browner on the lower back and wings, black crest 2 to 2.75 inches long; quills brown above, whitish below, with a few distant blackish bars and broad black tips, inner webs paler towards the base ; tail blackish brown above, with one very broad pale band about 2 inches from the end, and the tip pale ; chin and throat white, with black stripes forming a median gular band; breast white, with very large black spots; abdomen, flanks, and rest of lower parts banded black and white, the bands narrower on the legs.
At an earlier age, the sides of the head and the neck all round are rufous-brown, black-shafted, the breast rufous with smaller black spots; the abdomen banded rufous-brown and white; the tail with 4 blackish cross-bars, the basal one concealed by the coverts, the last subterminal.
In young birds the upper parts are pale brown ; the head and neck pale fawn-coloured, all feathers with whitish edges; the crest alone black, tipped with white; quills as in adults; tail with 4 blackish cross-bands, but narrower than in adults and less defined; lower parts buff.
Bill dull black, base plumbeous; irides yellow; feet yellow (Davison). The feathers of the tarsus come down to the basal portion of the toes, farthest on the middle toe as in S. nepalensis.
Length of a male 21.8; tail 9.5; wing 12.5; tarsus 3; bill from gape 1.4.
Distribution. Malay Peninsula, ranging into the extreme south of Tenasserim and to Borneo. Nothing particular is known of the habits.