Rio Branco Antbird

The Rio Branco antbird (Cercomacra carbonaria) is a Vulnerable bird species in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Brazil and Guyana. == Taxonomy and systematics == The Rio Branco antbird was described by the English ornithologists Philip Sclater and Osbert Salvin in 1873 and given its current binomial name Cercomacra carbonaria. A 2014 study confirmed what had been earlier suggested, that the Rio Branco antbird and the Mato Grosso (C. melanaria), jet (C. nigricans), and Bananal (C. ferdinandi) antbirds form a clade within genus Cercomacra. The Rio Branco antbird is monotypic. == Description == The Rio Branco antbird is 14 to 15.5 cm (5.5 to 6.1 in) long; one individual weighed 14.5 g (0.51 oz). Adult males are almost entirely black, with white edges on their outer scapulars, a white patch between them, and a hidden white patch under them. Their wing coverts and tail feathers have white tips and their flight feathers have white inner edges. Females have a brownish gray head and upperparts with a white interscapular patch. Their wings and tail are dark gray with greenish gray edges on the flight feathers. Their wing coverts are blackish gray with white tips…