Rondonia Warbling Antbird

The Rondonia warbling antbird is 11 to 12 cm (4.3 to 4.7 in) long and weighs 11 to 15 g (0.39 to 0.53 oz). Adult males have a black crown with a white central streak and a white supercilium on an otherwise black and white speckled face. Their upperparts are olive-gray with a white patch between the scapulars; the center of the patch has black and white speckles. Their rump is rufous. Their flight feathers are brown with yellowish olive-brown edges and their wing coverts black with white tips. Their tail is brown with pale buff tips to the feathers. Their throat is very pale gray. Voice: The male Rondonia warbling antbird's song is even-paced, starting with a long note followed by four to six shorter clear notes. The female's song "starts with a long note and ends in an abrupt note".