The fur is dark brown, heavily tinged and white. The species ranges across the state, but is uncommon. They choose protected sites 10-15 feet above the ground. Strong, swift fliers, they take to the air later than most other bats. They prey mostly on insects, but occasionally take pipistrelles.
Hoary bats migrate to warmer climates in winter.
In spring, they return and raise young. The young are born from mid-May to early July, usually two to a litter. The female gives birth while hanging in a tree. Young grow rapidly and are able to shift for themselves in about a month. Elmerton Avenue, Harrisburg, PA 17110-9797.