Owls and hawks take some, as do housecats, raccoons, and foxes. Rat snakes occasionally eat hibernating bats. Other causes of mortality include cave floodings, vandalism, and habitat disturbance. The greatest threat to bats comes from humans. Caves may be flooded by dams, or dynamited shut.
Some scientists suspect that widespread use of pesticides also harms bat populations.
Elmerton Avenue, Harrisburg, PA 17110-9797.