Ash-throated Antwren is a poorly known species that is restricted to a very small region in the Andean foothills in northern Peru. The male is primarily light gray, with a black cap and line through the eye, a white supercilium, and black wings with white wing bars. The male is similar to several other members of the Bahia Antwren group (Herpsilochmus pileatus and related species), although Ash-throated Antwren is more strongly washed with gray on the throat and breast. The female Ash-throated differs from the females of related species by the distinct buff supercilium, throat, and breast. Ash-throated Antwren forages, usually in pairs, in the subcanopy and canopy of humid montane forest, usually as a member of mixed species flocks containing other species of insectivorous birds. Otherwise very little is known about this species. Ash-throated Antwren is considered to be Endangered, due to its very small distribution and ongoing habitat destruction within this region.