Formerly known as the hairy-arm bat, Leisler’s bat (Nyctalus leisleri) is similar to the noctule bat, but slightly smaller and hairier.
This is a woodland species that is often found roosting in tree holes and, in some areas, has taken to using bat boxes more readily than other species. It has also been observed sharing a roost with pipistrelle and noctule bats.
Its diet consists of flies, moths, caddisflies and beetles, and its call can sometimes be heard by the human ear.
It is a mobile species, often occupying one roost for only a few days before moving on to the next roost site.
Leisler’s bat is found across the UK, with Ireland acting as a stronghold.