Roost sites often are in edge habitats adjacent to streams, fields, or urban areas. Preferred roost sites are protected from above, open below, and located above dark ground-cover. Such sites minimize water loss. Females and young may roost in higher sites than males. Young are born and roost in sites with the characteristics described under cover requirements.
Family groups roost together.
Nursery colonies are found with many females and their young. Prefers edges or habitat mosaics that have trees for roosting and open areas for foraging. In cold climates spends the winter in hibernation, with arousals on warm winter days. In California, most individuals probably make relatively short migrations between summer and winter ranges. They may be found in unusual habitats during migration.