Adults males may weigh 140g and have a wingspan of 60cm. They hang up during the day in the dense canopy of evergreen trees, and occasionally under the eaves of houses, in colonies ranging from single individuals to dozens.
Males are territorial and emit a monotonous, honking call to attract females.
The vocalization is associated with an elaborate visual display to attract females whereby the white shoulder hairs are erected and the wings flutter rapidly, possibly to waft scents from their shoulder glands to the females.