Photo Credit: Bureau of Reclamation

Western Red Bat

Lasiurus blossevillii

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Call characteristics:

High frequency caller (36-54 kHz)


3 9/10 - 4 1/3 in

(10 – 11 cm)


  1/3 - 1/2 oz

(10 - 15 g)

The western red bat has red fur, bicolored, with white tips; males often appearing more vibrantly pigmented than females. The species is slightly smaller than the closely related eastern red bat. Western red bats are often found in riparian habitats, particularly those associated with cottonwood trees. During the active season it roosts in the foliage of trees and shrubs; however, little is known about the species' winter activity or roosting sites. Favorite foods include beetles, flies, and moths. Mothers typically birth twins but can deliver up to 5 pups in a litter! In the wild western red bats may survive to over 12 years in age.

Conservation Status

Canada Species at Risk

Photo Credit: Bureau of Reclamation




NABat utilizes monitoring data provided by a broad network of partners to support regional and range-wide inferences about changes in the distributions and abundances of bat populations facing current and emerging threats.

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.