The three-striped warbler (Basileuterus tristriatus ) is a species of bird in the family Parulidae. It was previously considered conspecific with the Tacarcuna warbler and the black-eared warbler. This bird is found in South America from Venezuela to Peru and Bolivia. Some authorities recognised birds from the southern part of the range as a separate species, the Yungas warbler (Basileuterus punctipectus ).
The three-striped warbler measures 13 cm (5.1 in) in length. It is mostly olive-brown with a buffy belly and underparts. It has distinct black and white striping on the head and a dark cheek. Male and female three-striped warblers have similar plumages.
Their song is a rapid series of squeaky chirps.
It is found in Bolivia, Colombia, Ecuador, Peru, and Venezuela. Its natural habitats are subtropical or tropical moist montane forests and heavily degraded former forest. The three-striped warbler typically forages on the ground, especially near riparian areas.
