Round-tailed Manakin

The round-tailed manakin is 10.5 to 11 cm (4.1 to 4.3 in) long and weighs about 16.5 g (0.58 oz). The species is sexually dimorphic. Its tail has a rounder end than those of other Ceratopipra manakins. Adult males have an almost entirely red head and neck. Their thighs are creamy yellow. Their throat and the rest of their plumage are black. Adult females are mostly dull olive-green; their underparts are lighter than their back, especially on the belly. Both sexes have a blackish bill and smoky pinkish legs and feet. Males have a white iris and females a grayish one. Immature birds of both sexes resemble adult females but with a darker gray iris.

The round-tailed manakin is found from southern Amazonas Department in eastern Peru south through extreme western Acre in Brazil and into northern Bolivia as far as western Santa Cruz Department. It inhabits humid forest, of both terra firme and seasonally flooded types, in the lowlands and Andean foothills. In elevation it reaches 1,500 m (4,900 ft).

The round-tailed manakin's diet and feeding behavior are not known. They are assumed to be similar to those of other Ceratopipra manakins, for one of which see here.