bicolored antvireo Dysithamnus occidentalis

Small, plump antbird of Andean cloud forest. Very rare in Ecuador and northern Peru, but somewhat more common in western Colombia. Male is dark gray; female additionally has chestnut back and crown. Both sexes have white dots on wings; on some birds, these dots may form parallel lines. Inhabits understory of forest interior. Usually first detected by voice; vocalizations include soft churrs, rattles, and inflected notes given alone or in a quick series.