The California myotis, Myotis californicus, is a small bat that occurs in western North America, from Mexico to Canada. The species can be found in much of Utah, where individuals roost and hibernate in rock crevices, buildings, and caves. Females may form small nursery colonies, but most members of the species occur alone or in small groups.
Females give birth to only one litter of one young per year, but may be reproductively active for as long as fifteen years. The diet of the California myotis is composed entirely of insects. Foraging activity often occurs within ten feet of the ground, near trees or over water. The species is nocturnal, with the majority of activity occurring just after sunset.