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Photo credit: Saguaro NPS

Nyctinomops femorosaccus

Order: Chiroptera

Suborder: Yangochiroptera

Family: Molossidae

Call characteristics:

Low frequency caller (~18 kHz range)


  1/3 - 1/2 oz

(10 - 14 g)

Body Length

4 2/5 in

(11.2 cm)

There are various sources for bat species range maps including IUCN, NatureServe, U.S. Fish and Wildlife Service ECOS, and the National Atlas of the United States

Pocketed Free-tailed Bat

Pocketed Free-tailed Bat

The pocketed free-tailed bat is dark brown with ears that connect in the center. They get their name from a fold of skin that forms a pocket near their knees. This bat can be found roosting in rock crevices, small caves, and buildings within desert shrub and pine-oak forest habitats. Pocketed free-tail bats tend to have colonies of less than 100 individuals. Their range include the southwestern US and Mexico. This species eats mostly large moths but also beetles and other insects. Mothers have one pup per year.

Information used to populate this page was obtained from the following sources:
NatureServe Explorer
United States Fish and Wildlife Service Environmental Conservation Online System
Bat Conservation International Bat Profiles
National Atlas of the United States. (2011). North American Bat Ranges, 1830-2008. National Atlas of the United States. Available at:
Taylor, M. 2019. Bats: an illustrated guide to all species. Washington, DC: Smithsonian Books.

Conservation Status

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