Male: the head and upper breast are bright yellow, the lores and the region around the base of the bill black;
rest of the plumage silky black. Female: the top and sides of the head are dull brownish-olive; a yellow
eyebrow; back brownish olive, streaked blackish; wings and tail blackish brown, with some olive edging. Throat
and upper breast bright yellow, shading to greenish grey on the belly and the under tail-coverts.
A series of slurred rasps, rusty squeaks, and thin descending buzzes interspersed with occasional series of descending musical notes 'chee-chee-chee'