The slender antbird (Rhopornis ardesiacus) is an endangered species of bird in the family Thamnophilidae. It is monotypic within the genus Rhopornis. It is endemic to dry forest at altitudes of 100–1,000 metres (330–3,280 ft) in Bahia and Minas Gerais in Brazil. It is threatened by habitat loss. This relatively long-tailed antbird is about 19 centimetres (7.5 in) in length. Both sexes are grey with black-and-white markings on the wings and red eyes. The male has a black throat, while the female has a white throat and a brown crown.