It is found in the western and southwestern U.S., mostly in arid areas. These bats roosts in caves, rock crevices, mines, hollow trees, buildings, and under bridges. They also use bat houses. Females form maternity colonies of 30 to 150 individuals and have been found in rock crevices and under tree bark.
Males form smaller bachelor colonies.
Pallid bats hibernate in deep rock crevices, caves, mines, and buildings. It ranges from southwestern Canada to the U.S. and Mexico. Big-eared bats roost in caves, cliffs, abandoned mines, and rock ledges. Western populations also roost in buildings. These bats generally do not use crevices in buildings, but prefer large spaces that trap hot air.