Common noctules are one of the first British bats to emerge in the evening. They are one of the larger British bat species and come out sometimes before sunset, to feed on moths, beetles and other large flying insects, flying fast and high above the ground. From October to April, noctules hibernate in trees, bat boxes, buildings and rock fissures. They sometimes sit on top of each other to keep warm though, in particularly cold winters, up to half might freeze to death in inadequate hibernacula.

More...