Where do bat's live?

Different species will 'prefer' to roost (ie. 'live') in different structures- in the roves of buildings, on the underside of bridges, in caves, in crevice's in rocks, on the roof of tunnels, in mines, in tree hollows and some species just roost in trees. Others furl large leaves around a group of 5-10 bats. But in general, they like to roost in groups in dark, humid environments.