Small streaked antwren of riparian habitats. Males are white with black streaking; females are similar but with an extensive reddish wash. Tail very short in both sexes. Usually found in waterside vegetation around still or slow-moving water bodies like streams and lakes, where it forages low in vegetation overhanging the water. Gives two main songs: an even-pitched, accelerating trill of musical notes, and a slow ascending-descending series of whistled notes. The latter is one of the most characteristic bird sounds around oxbow lakes in Amazonia.