Two geographically well-separated populations of the Two-banded Warbler are known, one in western Guyana and northernmost Brazil, and the other on the east slope of the Andes between Peru and northern Argentina. Despite that three subspecies are recognized (two of them in the Andes) and the species’ extremely range, there is relatively little geographical variation in plumage. All populations are principally yellow below, with bright olive-green upperparts, a black eyestripe and lateral crown stripe, and a rufous central coronal stripe. The Two-banded Warbler inhabits humid montane and submontane forests, usually with a dense understory (often with much bamboo in Peru). Pairs or small (presumably family) groups regularly join mixed-species flocks.