Plump, short-tailed bird of Amazonian rainforest. Both sexes have a chestnut breast. Male has a black face and throat and a bright white tuft behind the eye. Female lacks black in her plumage, and instead of a tuft she has a pale line through her face. Female is similar to female Ash-throated Gnateater but has plain, unmarked wings. Birds in central Brazil south of the Amazon are now considered a separate species, Black-breasted Gnateater; male Chestnut-belted has less black extending only to upper breast; female looks almost identical. Usually seen on a low perch in the understory and may resemble a small antpitta. Vocalizations include a rattling, metallic trill and a short, soft “chuff”.