Hoary Bat

Lasiurus cinereus
Chuck Fergus    

The largest bat of the eastern forests, the hoary is 5.1 - 5.9 inches long; has a 14.6 - 16.4-inch wingspread; and weighs 0.88 - 1.58  ounces. The fur is dark brown, heavily tinged and white. The species ranges across the state, but is uncommon. Hoary bats roost in trees; they prefer conifers, but also use deciduous trees in woods, forest edges and farmland. They choose protected sites 12 - 40 feet above the ground. Strong, swift fliers, they take to the air later than most other bats. They prey mostly on moths, but also take beetles and mosquitoes.    

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. Females have two pairs of breasts and sometimes have three or four pups in a litter. The female gives birth while hanging in a tree. Young grow rapidly and are able to fend for themselves in about a month.



Pennsylvania Game Commission
Bureau of Wildlife Management
Attn: Mammal Atlas Coordinator
2001 Elmerton Avenue
Harrisburg, PA 17110
Pennsylvania Game Commission
Bureau of Wildlife Management