Can live to 6 or 7 years old and live in colonies of hundreds of thousands.
They will migrate hundreds of miles to get from their summer habitats to their winter ones where they hibernate in cave walls, attics and other dark places.
They are nocturnal and hunt most actively for a few hours after dusk. They must eat half their body weight in insects per night.
They can fly up to 40mph.
They are masters of echolocation, which is when animals estimate the location of objects and prey through sensing noise vibrations. They communicate by honking to warn others while feeding.
While they have poor vision, they are not blind. Some bats can see in ultraviolet light and have excellent smell and hearing.
Predators: Variety of wild mammals, birds, snakes, and domestic cats.