New York Natural Heritage Program
Little Brown Bat
Myotis lucifugus (Le Conte, 1831)
Mammals

New York State Distribution [-]
The little brown myotis appears to still occur throughout most of New York as of 2013 (NYSDEC unpublished data). However, it is unclear whether die-offs associated with white-nose syndrome may have reduced the summer distribution in some areas of the state.

Global Distribution [-]
The distribution of the little brown myotis is widespread in North America spanning from southern Alaska and Canada through most of the contiguous United States, though the species is generally absent from the southern Great Plains region (NatureServe 2013). Southwestern populations formerly assigned to this species have now been assigned to M. occultus (Piaggio et al. 2002; NatureServe 2013). The southwestern range boundary includes southern California (except extreme southeast), Nevada, northern Utah, northern Colorado, and perhaps northeastern New Mexico (Piaggio et al. 2002). The high density of caves in the Appalachian Mountain range and eastern Midwest (Culver et al. 1999) likely support much larger populations of this species than in other parts in the species' range (NatureServe 2013). The largest known colonies of little brown myotis are in the northeastern and mid-western United States, with the northeastern population considered the core range of the species (Kunz and Reichard 2010). Smaller populations occur in the southern and western United States (Davis and Hitchcock 1965; NatureServe 2013).