Green Black-capt Warbler, Nuttall, Manual, vol. i. p. 408.
Adult Male. Plate CXXIV. Fig. 1.
Bill short, straight, conical, depressed at the base, compressed towards the end, the tip acute; upper mandible slightly convex in its dorsal line, the sides convex, the edges sharp; lower mandible straight along the back, the sides convex. Nostrils basal, oval, half covered by the bristly feathers of the forehead. Head of ordinary size, neck short, body compact, rather slender. Feet of ordinary length, slender; tarsus compressed, covered anteriorly with a few long scutella, sharp behind, longer than the middle toe; toes free, scutellate above; claws arched, slender, much compressed, acute.
Plumage soft and blended, slightly glossed; short but distinct bristles at the base of the upper mandible. Wings short, the second quill longest. Tail rather long, even, of twelve rounded feathers.
Bill light-brown. Iris hazel. Feet flesh-coloured. Back, rump, and upper tail-coverts olive-green; crown black, bordered on the forehead and over the eyes with a broad band of bright yellow. Wings and tail dusky, the feathers margined with green, the tips of the first row of small coverts and of the secondary coverts pale greenish-grey. The sides of the neck greenish-grey, the lower parts in general bright yellow.
Length 4½ inches, extent of wings 6¾; bill along the ridge 3⁄12, along the edge 5⁄12; tarsus 8⁄12.
Adult Female. Plate CXXIV. Fig. 2.
The female has the colours in general somewhat paler, and is without the black patch on the head, it being substituted by a light yellowish-grey colour.