White-Nose Syndrome in Bats is explained by this video produced by the Game Commission. (click here to view video)
First documented in New York in the winter of 2006-07, White-Nose Syndrome is believed to have surfaced in Pennsylvania in 2008 and began killing cave bats in 2009. WNS refers to a white fungus on the muzzles and wing membranes of affected bats.
The fungus may be a symptom and not the cause of the mortality occurring in hibernating bat colonies throughout the states of Northeast. Bats affected with WNS do not always have the fungus, and do leave hibernacula in winter and usually die on the landscape. It is unclear at this point if or how WNS is transmitted.
Visit the Game Commission website for more information.