Mato Grosso Antbird

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. Voice: The male Mato Grosso antbird's song is a "ery low, very dry, froglike 'krokreéeh-tjow' " that is often answered by the female's "high, strident 'chip-chip- -' ".