Although the northern long-eared myotis is common and widespread, much remains to be learned about its roosting habits, reproduction, and longevity. This bat is known to hibernate in caves and mines and to roost under tree bark. Learn more about the Myotis septentrionalis, more commonly known as a Northern Long-eared Myotis, in this easy-to-read species overview by the Smithsonian's National Museum of Natural History.