A distinctive whistler of dark, dingy appearance. Body color is a dank mossy olive, with a slate-gray throat and a black cap. Hood often appears one-colored in forest light. Female is golden below and olive above with a gray head and a white throat. Mainly found in primary forest above 1100 meters of elevation, but does wander lower. Occurs together with Oriole Whistler, but differs in the male’s lack of a bright golden throat, neck, and belly and the female’s olive back and unstreaked underparts. Voice includes a sequence of loud, almost electronic staccato whistles.