They can be found in most of the United States and Canada. They live along streams and lakes -- where insects are abundant. In the winter, little brown bats form clusters and hibernate in mines and caves. In the spring, they form huge nursery colonies containing around 1,000 bats. They can live anywhere from 20 to 30 years.
Little brown bats are insectivorous and eat a variety of insects such as moths, wasps, beetles, gnats, mosquitoes, midges and mayflies. They can eat 50 percent of their own body weight each evening. Pregnant females and those with pups eat even more insects.
These nocturnal mammals use echolocation to navigate and locate prey. They send out signals and listen for those signals to return. Their sensitive hearing and huge ears help them pinpoint their prey.
Like their celebrity look-a-like, they use their sharp teeth to capture their prey.