The wings extend down the sides of the body to the legs. Besides flying, bats use their wings for crawling, catching prey and grooming. Pregnant females also catch their newborns in this membrane. The little brown bats' ears are very large when compared with the head size. When laid forward, the ears reach the nose.
Little browns have strong jaws and teeth, and short necks.
The toes have sharp claws that curve under to hook onto rough surfaces. Bats often live for more than 10 years. Other equally small mammals such as shrews have a very short life span of a year or two. In Newfoundland little brown bats are found virtually anywhere there are trees, buildings, or caves. In the summer they will roost in buildings or trees.