Associated with mature forests adjacent to lakes, ponds, and streams, but often occurs distant from water. Roost in loose bark, crevices, woodpecker holes, bird nests in trees, and buildings. Trees, rarely caves, are used as hibernacula (NatureServe 2006, MacDonald and Cook 2009).
MacDonald, S. O. and J. A. Cook. 2009. Recent Mammals of Alaska. University of Alaska Press, Fairbanks, AK.
NatureServe. 2006. NatureServe Explorer: An online encyclopedia of life. Version 5.0. NatureServe, Arlington, VA. Available http://www.natureserve.org/explorer.