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Photo credit: BLM

Eumops perotis

Order: Chiroptera

Suborder: Yangochiroptera

Family: Mollosidae

Call characteristics:

Low frequency caller (10-25 kHz)


  2 - 2 1/2 oz

(56 - 70 g)

Body Length

 7 1/2 in

(19 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

Greater Bonneted Bat

Greater Bonneted Bat

The greater bonneted bat, also known as the greater mastiff bat, has brown to gray-brown fur that gets lighter on its belly and long ears which extend over its nose. This species ranges from the southwestern US south into Argentina. The greater bonneted bat is the largest bat species in the US with a two foot wingspan. This bat does not migrate or hibernate. This large bat roosts at least 20 ft high in small groups within rock fissures. They prefer to eat moths but also consume other flying insects. The greater bonneted bat can have a lifespan of 10-15 years in the wild.

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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