The White-lined Antbird locally is fairly common, but has a geographically restricted distribution: its range is centered on southeastern Peru, but it also occurs in adjacent regions of southwestern Brazil and in northern Bolivia. The English name refers to the white tips of the wing coverts in the male. Otherwise the plumage of the male primarily is slate gray, with a blacker crown. The female is two-toned, rusty brown on the upperparts and whitish below. Both sexes have elongated feathers on the crown, which they raise as a crest when excited. Another typical habit is to drop the tail rapidly, then to slowly raise the tail and fan it. They usually forage as pairs, on or near the ground. White-lined Antbirds inhabit dense thickets in river-edge forest, usually in in stands of bamboo (Guadua) but sometimes in Heliconia or other understory plants.