939. Corydon sumatranus.
The Dusky Broadbill.
Coracias sumatranus, Raffles, Trans. Linn. Soc. xiii, p. 303 (1822). Corydon sumatranus, Strickl. A. M. N. II. vi, p. 417 (1841) ; Blyth, Cat. p. 195; id. Birds Burma, p. 125; Horsf. & M. Cat. p. 117; Hume Dav. S. F. vi, p. 97 ; Hume, Cat. no. 139 sex ; Bingham, S. F. ix, p. 157 ; Oates, B. B. i, p. 430 ; Sclater, Cat. B. M. xiv p. 466.
Coloration. Black throughout with the following exceptions :— a concealed interscapulary patch crimson (or occasionally yellow) and white, consisting of the basal parts only of the feathers, the tips being black ; a broad white band across the primaries close to the coverts ; a subterminal white spot or band on all tail-feathers except the middle pair; the throat and upper breast, which are dirty brownish white, the edges of the feathers in places darker. Female the same.
Young duller black, without an interscapulary patch, and with the white of the throat ill-defined.
Upper mandible varying from dark reddish brown to. pale horny brown, lower mandible pale fleshy-pink with a dark median streak, tips of both whitish ; orbital skin and gape dark fleshy-pink; legs, feet, and claws black; irides deep brown.
Length 10.5; tail 4.2 ; wing 5.4 ; tarsus 1.1; bill from gape 1.6,
Distribution. Apparently throughout Tenasserim, except in the deciduous forests, as far north as Karennee ; also the Malay Peninsula, Sumatra and Borneo.
Habits, &c. This bird is found in pairs or small parties in forests. It is somewhat crepuscular according to Tickell, and during the day very sluggish. It has an oft-repeated mellow, rather musical note; also a clear whistle, which it utters when flying from tree to tree. The nest and eggs do not appear to have been recorded.