Family: Vespertilionidae, Vespertilionid Bats view all from this family

Description Large-sized Myotis with longer, denser fur on the underside of the wing between the knee and elbow than in other species of Myotis. Has short, keeled calcar, and short, rounded ears. Color varies from dark brown to reddish buff, with darker ears and membranes. Forearm 35-42mm.

Dimensions 76-106mm, 29-49mm, 5-10g

Warning Bats are susceptible to rabies, a serious viral disease that results in death if untreated. Rabid bats rarely attack humans or other animals, but bats found lying on the ground may be rabid. Never touch or pick up any bat. Stay away from any animal that seems to be acting strangely and report it to animal-control officers. If you are bitten by a possibly rabid animal, you must immediately consult a doctor for a series of injections; there is no cure once symptoms emerge.

Habitat Forests & woodlands, Canyons & caves

Range Plains, Rocky Mountains, Southwest, Texas, California, Northwest, Western Canada

Discussion Strong flyers, they have been clocked at 15-17kph. Some individuals may return to the same foraging area night after night. Maximum life span is at least 21 years based on capture-recapture records. Roosts in ponderosa pine snags, crevices, cracks, caves, and abandoned buildings, and in winter they hibernate in caves and mine tunnels. Occupies rugged, mountainous terrain, most commonly 2000-3000m. Primarily limited to coniferous forests, but also found in oak and riparian woodlands, extending down into desert areas almost to sea level.