Photo Credit: BLM California

Western Yellow Bat

Lasiurus xanthinus

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Call characteristics:

High frequency caller (~50 kHz range)


4 - 4 1/3 in

(10 – 11 cm)


  1/3 - 4/5 oz (9.2 - 22.5 g)

The western yellow bat has blonde fur, darkened in the vicinity of its ears. Found throughout Mexico and the southwestern United States, it occupies a large range of habitats including riparian woodlands, desert regions, and tropical forests. The western yellow bat roosts in trees and within dead palm fronds, well-camouflaged by its yellowish fur. This bat migrates south for the winter but does not hibernate. Beetles are the main food source of western yellow bats though they will eat other insects. Mothers usually rear two to four pups annually.

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.