Smithsonian National Museum of Natural History, North American Mammals
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Balantiopteryx plicata

Gray Sac-winged Bat

Order: Chiroptera
Family: Emballonuridae


Conservation Status: Least Concern.

The Gray Sac-winged Bat is fairly common in deciduous forests and thorn scrub. It roosts near entrances of caves or mines and sometimes in hollow trees or even buildings. The bats leave their roost just before sunset and fly high over the treetops, diving to catch flying insects. When they roost, these and most other sac-winged bats typically use both their hind claws and their thumbs to hang onto a vertical surface instead of hanging by the claws alone.

In this family of bats, the tail is shorter than the uropatagium (tail membrane), and the tip of the tail sticks up through the membrane.

Range: Head and Body: 47-53 mm; Tail: 13-17 mm

Range: 5-6 g


Peters, W., 1867. Monatsberichte Koeniglich Preussiche Akademie Der Wissenschaften. Berlin. 1867:476.


Mammal Species of the World

Mammalian Species, American Society of Mammalogists' species account

Distribution of Balantiopteryx plicata