Near the end of the summer, the bats may enter torpor to begin conserving fat for winter hibernation. Later in the fall, the bats return to these caves to hibernate. During the summer, the bats stay alert on warm days. As night approaches they become louder and more active, and squeaking can be heard. At dusk they emerge and feed.
Individuals tend to follow the same flight pattern repeatedly when foraging.
At dawn, the bats return to their roost and defecate before entering. In the summer, the colonies prefer a very hot area with temperatures as high as 131 degrees fahrenheit. Usually, the colonies form in an attic, but sometimes are found behind siding or under bridges. Single males can be found under bark and in rock crevices as well as the same types of areas where maternity colonies occur. Sometimes groups of males can be found in caves.