Mato Grosso antbird

The Mato Grosso antbird (Cercomacra melanaria) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, and Paraguay.

The Mato Grosso antbird is 16 to 16.5 cm (6.3 to 6.5 in) long and weighs 18.5 to 19.5 g (0.65 to 0.69 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 an olive-grey head and upperparts with a white interscapular patch. Their wings and tail are dark gray; their wing coverts and tail feathers have white tips. Their underparts are pale olive-gray that is whiter on their throat and the center of their breast.