The head and back are covered in dark brown fur that varies from reddish to almost black, while the sides and underparts are a paler, grey, colour.

The ears are large and rounded, with a small, pointed tragus and dark, hairless skin.

[2] Adult males possess a sacular organ on the throat, the function of which is unknown, but which is only vestigial in females.

It inhabits a range of forested habitats throughout this region, from coastal lowlands to the slopes of the Andes at least 1,800 m (5,900 ft) in elevation.

[3] In larger spaces, such as inside lofts or belfries, they may hang grouped together in clusters of at least fifteen.