Little brown bat, Myotis lucifugus, myotis, myotis bat, little brown bats, bat, little brown myotis, bats, nocturnal, night animal, vespertilionid, vespertilionids, vesper, insectivore, insectivores, insectivorous, night flying, night flight, carnivore, carnivorous, carnivores, pest control, insect eating, beneficial, brown, fur, mammal, mammals, biosonar, face, face closeup, face close-up, teeth, fang, fangs, open mouth, mouth, aggression, aggressive