A Bat-Killing Fungus Has Spread Over Half The Country

White nose syndrome, a condition spread by a killer fungus making its way rapidly through America's bat population, has now spread to over half the states in the U.S.

With its confirmed arrival last week in both Michigan and Wisconsin, the total of states with infected bat populations hit 25. As you can see on this map of the syndrome's progress generated by Pennsylvania's Game Commission, white nose syndrome has made rapid inroads in both the U.S. and Canada in the eight years since researchers first detected it. And, as no cure has yet been detected for the frequently fatal syndrome, it's definitely cause for concern.

Image: Map of white nose syndrome, as of April 11, 2014 / PA Game Commission via White Nose Syndrome.