The Little Brown Myotis (Little Brown Bat) is a species that is well known. It is very small with an overall body size that is from 2.5 inchese to 4 inches. They also weigh no more than half an ounce. The span of their wings when outstretched can be up to 11 inches. They are brown in color and they have ears which are short and round.
They hibernate in winter limestone caves and mines, mostly in the Ozarks. In spring they dispersen up to 620 miles. In spring and summer, females live in nursery colonies in cliff crevices and hollow trees, under loose bark, in attics, and other unditurbed retreats. Males are solitary or live in colonies up to 20 in similar protected sites, including under siding and shingles.