Barbastelle Bats are quite rare in Britain and indeed across Europe, but they are found albeit in small numbers throughout much of Wales. These bats are of medium size, having a head-and-body length of 4 to 5.5cm and weighing between 6 and 13gm.
A distinguishing feature of this species is its very broad ears, joined at the top of its head; it also has a very blunt pug-like face.
You may see Barbastelle Bats along wooded river valleys, where they fly low to take insects. They often emerge before dark.
In summer Barbastelle Bats are sometimes found roosting in hollow trees and in buildings, but little is known about the location of their maternity colonies.
Although the winter roosting sites of Barbastelle Bats are also something of a mystery, they have been found in cold underground sites, where they generally hang free. Barbastelles have also been found occasionally in winter roosts among tree roots.