The following species have been infected by white-nose syndrome: little brown bat (once the most common bat in the eastern United States), northern long-eared bat (threatened), tricolored bat, Indiana ...

The big brown bat is the Adirondack’s largest bat; only the hoary bat is larger. The long, lustrous fur is brown. The ears, wing and tail membranes are black. Total length is 105-123 mm (4.1-4.8 in).