The little brown bat is widespread across North America. It hibernates in caves and similar sites in winter, while females gather at summer maternity roosts to raise young.
The back is brown to yellowish brown and the underside is paler. The wing membranes are dark, and the fur has a glossy appearance.
It hibernates in caves, mines and similar sites in winter. In summer, females use maternity roosts where they gather to raise young.
An extinction-risk assessment has not been added yet.