The Northern Long-eared Bat pdf format of Northern Myotis
(Myotis septentrionalis) (NLEB) is one of the species of bats most impacted by the disease white-nose syndrome (WNS). 

Hibernating northern long-eared bat by Ann Froschauer/USFWS

Due to severe population declines caused by WNS, the U.S. Fish & Wildlife Service (USFWS) listed the Northern Long Eared Bat as a Threatened species under the Endangered Species Act (ESA, 50 CFR 17.11) on April 2, 2015. NLEB is also listed as Endangered under the Massachusetts Endangered Species Act (MESA, M.G.L. c. 131 A).   

Projects that result in tree removal activities shall comply with the 4(d) rule under the ESA (effective 2/16/2016). “Incidental take resulting from tree removal is prohibited if: 1) Occurs within 0.25 mile radius of known northern long-eared bat hibernacula or 2) cuts or destroys known occupied maternity roost trees, or any other trees within a 150-foot radius from the known maternity tree during the pup season (June 1 through July 31).” For more information on the Northern Long Eared Bat and the 4(d) rule, please visit: Please note that if your proposed project or activity is also within Priority Habitat as codified under the MESA, a separate MESA review will be required.

To assist project proponents with the review processes described above, the NHESP is providing the following map for known locations of winter hibernacula and maternity roost trees.  Please contact USFWS for additional information on project compliance with the ESA for the Northern Long-eared Bat.

Northern Long-eared Bat Locations in Massachusetts

Please click here to open a full screen map which contains additional information, including the type of habitat (hibernacula or maternity roost tree) and whether the location is mapped as Priority Habitat.

Please note this map is updated as new information is received. Last Updated November 30, 2016.