White-nose syndrome (WNS) is an emerging disease in North American bats which by 2012 was associated with at least 5-7 million bat deaths. The condition is named for a distinctive fungal growth around the muzzles and on the wings of hibernating bats and was first identified from a February 2006 photo taken in a cave in Schoharie County, New York. It has rapidly spread. https://en.wikipedia.org/wiki/White-nose_syndrome Bats eat about 600 mosquitoes an hour.