Habitat
Understorey and middle storey forest edges in "terra firme" forest (with no flooding), transitional forest and "várzea" (seasonally flooded forest), as well as some tall secondary woodland. From sea-level - 1,300 m.
Considered by some authors to be a subspecies of Guianan Antwarbler (Hypocnemis cantator).
The following 3 subspecies are recognised:
implicata Zimmer, JT, 1932 - South-central Amazonian Brazil (eastern from lower and middle R Madeira to R Tapajós/Teles Pires).
striata (Spix, 1825) - R Tapajós/Teles Pires east to R Xingu, south to north-central Mato Grosso. Considered by some authors to be a distinct species, Spix's Antwarbler (Hypocnemis striata).
affinis Zimmer, JT, 1932 - R Xingu east to R Tocantins, south to eastern Mato Grosso.
BirdLife International Species Factsheet