The bat is brown with short ears, and can be distinguished from other large Myotis by a bare patch of skin on its back.

When insect populations are low in spring and autumn, they decrease their food consumption.

Since caves tend to have consistently cooler temperatures which impose energetic strain from maintaining thermoregulation, it is believed that they likely exhibit a combination of behaviors in response, such as consuming greater quantities of food and clustering in order to minimize heat loss.

Juveniles are efficient at foraging; they join their adult counterparts aged as young as four weeks.

Speculation is that bat species' homing ability relies heavily on olfactory sense and vision.