The Chestnut-vented Conebill is more or less the most geographically widespread of the genus Conirostrum, it being found over much of eastern Brazil south to Paraguay, northeast Argentina, and eastern Bolivia, as well as more patchily over central, western and northern Amazonia, and central Venezuela. It is found in mainly drier woodland, with or without tall trees, but more locally is found in humid forest. Males are dark blue-gray above including the crown, with a small white speculum in the wing, and a rather duller face and underparts (variable according to subspecies), with an obvious chestnut ventral region. In contrast, females are quite bright olive-green above, contrasting with the pale blue-gray head, with a pale supercilium and underparts; the ventral region is concolorous with the rest. Thus, while males are relatively easily identified, females could be mistaken for a variety of other small passerines, especially if only seen high in the trees, but the bill remains distinctively conical.