English Filipino French German Italian Portuguese Spanish About this Translator
Home / All About Bats / Species Profiles
BCI Species Profiles

© Merlin D. Tuttle, BCI

Myotis californicus

 California myotis (Vespertilionidae)
 Myotis californicus
 California myotis

 Family Name: Vespertilionidae
 Genus: Myotis
 Species Name: californicus

 Pronunciation: my-oh-tis cal-a-forn-a-cus
 Common Name: California myotis

The California myotis ranges throughout western North America from southern Alaska south into Guatemala and is one of the most abundant bats in desert scrub habitats, though it also can be found in oak and ponderosa pine woodlands. Throughout its range it roosts beneath loose bark and in crevices of old snags, as well as in tree crevices. It also forms small maternity colonies in cliff crevices, buildings, and bridges. Like many species, California myotis switch roosts on a regular basis, sometimes within a few feet, sometimes up to a mile apart.

Roost switching may aid in finding ideal roost temperatures as well as in avoiding predators and parasites. In most cases, roosts are located near feeding areas. These bats are among North America's smallest, enabling them to feed on especially tiny insect prey. It was not until miniature radio-transmitters could be outfitted to weigh less than half a gram that these bats could be tracked and their roosts identified.

Approximate Range:

Source: IUCN Red List

To learn more, read about this bat in the BATS magazine archive:

Hide and Seek: In Search of Forest Bats

<< Prev | Back to Species | Next >>
Unless otherwise noted, all images are copyright ©Merlin D. Tuttle and/or ©Bat Conservation International