More About Bats
Female big brown bats form nursery colonies in the spring and are joined by males in late summer. They leave their roost at dusk in a slow, fluttering flight to find food. They feed close to the ground on various insects including beetles, ants, wasps, flies and mosquitoes.
This species forms nursery colonies in early spring, then migrates south in autumn and hibernates in irregular clusters from September through April. They feed on insects, primarily flies and moths, and alternate their feeding with rest periods during which time they hang to digest their food.
This species migrates to Mexico for the winter, usually leaving in late October and returning in March. They feed on insects, eating up to 1/3 of their body weight each night.