Scarce antwren found in Andean forest mainly in Bolivia, but also known from a few remote locations in southern Peru. Male is plain gray; female is brown with a faint gray tinge to the crown. Female is similar to female Slaty Antwren, but lacks gray on the back. Found at middle to upper levels of the forest, and often moves with mixed-species flocks. Song is a series of short, descending whistles.