Little Brown Bat
The little brown bat is a small (less than 4-inch) bat that usually roosts in caves in groups of 20, has dark glossy brown fur on its back, and has ears 5/8 inch long or less that are narrow, naked, with bluntly rounded tips. The back fur is two-toned: blackish or dark gray at the base and brown toward the tips. The wing and tail membranes and the ears are glossy dark brown. There are 6 species of Myotis in Missouri, and they require close examination to be distinguished from each other.