Bats have few natural predators — disease is one of the biggest threats. Owls, hawks, and snakes eat bats, but that’s nothing compared to the millions of bats dying from white-nose syndrome The disease — named for a white fungus on the muzzle and wings of bats — affects hibernating bats and has been detected in 37 states and seven Canadian provinces. This deadly syndrome has decimated certain species more than others. It has killed over 90% of northern long-eared, little brown, and tri-colored bat populations in fewer than 10 years.