The fringed myotis is a migratory mammal that roosts in caves, mountain cracks, old buildings, and mines. It is part of the long eared myotis group. The fringed myotis has the shortest ears compared to closely related species in the long eared myotis group. Its ears are about 16.5 mm long (shown in pictures 1 and 2), making them longer than many other common Utah bats. It is also distinguished from closely related species by a distinct fringe of short hairs on the inter-femoral membrane. It has black ears, a whitish-grey underbelly, and a brownish back (shown in pictures 1 and 2). These bats are about 89 mm long and 8 grams in weight. They have a tail length of about 37 mm long. Females tend to be larger than males in this species. These bats are found in the western United States from Washington to the tip of Mexico. They are also found in all Utah counties where there are mines, caves, old buildings, and other mountain cracks.
Miller, S. (1897). Revision of the North American bats of the family Vespertilionidae, North American Fauna, 13 1-135.