The evening bat, Nycticeius humeralis, is an abundant bat throughout the southeastern United States, northward to the upper Midwest and Ontario. It ranges along the Atlantic seaboard south throughout Florida to Veracruz, Mexico. A true forest bat, the evening bat is almost never encountered in caves. It forms nursery colonies in hollow trees, behind loose bark, and sometimes in buildings and attics. Some of these maternity colonies are quite large, containing several hundred individuals. Evening bats emerge soon after dusk and forage on a large array of small nocturnal insects including flying ants, spittle bugs, June beetles, Japanese beetles and moths.
In the fall, evening bats store large amounts of fat indicating a lengthy migration to southern parts of its range. In a banded bat recovery study, bats were found as far as 340 miles south of their banding sites. Yet, little research has been done to learn exact migration movements of this species. They have not ever been found hibernating in local caves and appear to simply disappear from their summer habitat. Once these bats have arrived at their over-wintering sites, they are thought to remain active throughout the winter. (Source: Bat Conservation International)References: