One pup is born, which the mother looks after for about a month. She then takes it on its first flight in tandem with her. The length of time it takes a pup to mature depends on the weather, and sometimes the mother will move her baby to warmer areas on the tree. Indiana Bats eat flying insects and forage along river and lake shorelines, at the tops of trees in floodplains, and in upland forests. They sometimes eat as many as 17 times a minute.