Photo Credit: Alan Harper

California myotis

Myotis californicus

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Call characteristics:

High frequency caller (~40 kHz range)

Body Length

2 3/4 - 3 2/3 in

(7 – 9.4 cm)


  1/10 - 1/5 oz

(3 - 5 g)

The California myotis is one of North America's smallest bats. Its long fur varies from blond to dark brown, and distinguishing characteristics include a keeled calcar and extremely small feet. It ranges as far north as southeast Alaska and as far south as Guatemala, inhabiting deserts, grasslands, montane forests, and humid coastal forests. California myotis have been observed in a variety of roosts, including rock and tree crevices, bridges, caves, mines, buildings, shrubs, and even on the ground. Caves and buildings serve as hibernacula. This species feeds mostly on moths and flies but will also eat beetles, caddisflies, termites, and spiders. Females typically give birth to one pup at a time.

Conservation Status

Canada Species at Risk


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 (left). 


Photo Credit: Alan Harper




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.