Northern (Long-eared) Myotis
Similar in size and color to the little brown bat, the northern long-eared bat may be distinguished by its longer tail and narrower and longer ears. It ranges in forested areas throughout Pennsylvania, but is much less common than the little brown bat; its distribution is considered local and irregular. Length, 3.0 - 3.7 inches; wingspread, 9.0 - 10.7 inches; weight, 0.25 - 0.32 ounces. Long-eared bats roost singly or in small colonies in caves, behind window shutters, under loose tree bark and in cliff crevices. Females gather in nursery colonies in attics, barns and tree cavities. Probably a single young is born in July. Long-eared bats return to caves in fall, often sharing space with little brown bats, big brown bats and tri-colored bats.