Description wikipedia

The spot-backed antbird (Hylophylax naevius) is a species of bird in subfamily Thamnophilinae of family Thamnophilidae, the "typical antbirds". It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. The spot-backed antbird is 10.5 to 11.5 cm (4.1 to 4.5 in) long and weighs 11 to 14 g (0.39 to 0.49 oz). Adult males of the nominate subspecies H. n. naevius have a dark yellowish brown crown and nape. Their upperparts are mostly dark yellowish brown; the center of their back is black with pale buff spots and they have a white patch between their scapulars. Their flight feathers are dark brown with black bases and their wing coverts black with wide white to pale buff tips. Their tail is dark reddish yellow-brown with white to pale buff tips and a black band above the tips. The face is mostly gray; their throat and the lower sides of their neck are black. Their underparts are mostly white with heavy black spots across the breast and along the sides. Their lower belly and undertail coverts are buff. Adult females are similar to males but have paler upperparts, buffier wing coverts, a white throat with a black band above it, and buff rather than white underparts with the same heavy black spots as males. Juveniles have no interscapular patch, no breast spots, and buffy brown underparts with an olive-brown band across the breast.