The U.S. Fish and Wildlife Service recently estimated that 5.7 to 6.7 million bats in North America have died due to white-nose syndrome.
First noticed in New York in 2006, the mysterious disease has spread into 16 states, including Virginia, and Canada.
Biologists are studying what causes the ailment, characterized by a white fungus that grows around the bats’ faces. They expect the disease will continue to spread.