The Pygmy Antwren is widespread in Amazonia. Males have yellow underparts with black-and-white streaking above; females have buff-and-black streaking on the head and back. Birds forage along open forest edges and light gaps.
The male has black-and-white streaking across the head and upperparts, a white throat, yellow underparts with broad black streaks along the sides of the breast, and a short black tail with a white terminal band. In the female, the head and upperpart streaks are buff and black.
It forages at canopy and sub-canopy edges facing open areas. The Bolivia account describes birds feeding in vine tangles at light gaps and forest edges, usually as close pairs in the middle or lower canopy; they sometimes join mixed flocks.
An extinction-risk assessment has not been added yet.