Millions of bats are dying of an introduced fungus that causes white-nose syndrome, which is fatal to bats, and careless use of wind turbines is killing millions more needlessly. By simply not spinning the blades at low wind speeds at night when bats are migrating, kill rates could be reduced by as much as 90% with minimal loss of power production. However, even before these threats appeared, two of America’s formerly most abundant species had become endangered (Indiana and gray bats) through roost loss alone. Millions have died in the past decade in the U.S. alone, but since they’ve traditionally been unpopular, and neglected by conservationists, status trends often have gone undocumented. Learn more in the Bat Education Zone.