Four of the nine species of Adirondack bats belong to the genus Myotis, the mouse-eared bats. The little brown bat is the most abundant of the four, and is the common bat of the region. During the ...

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).

Little brown bat populations declined 89%, big brown bats dropped 47%, and Indiana bats saw the smallest effects, dropping 15%. Installing bat boxes can help provide emergency shelters for bats ...