Serotine bats fly much slower than pipistrelles and appear much heavier in flight.
From the iwcp.co.uk
Serotine bats are confined to southern England but they seem to be changing their range.
From the iwcp.co.uk
Britain's largest bats, the noctule and the serotine, are particularly visible in August and September feeding on dung beetles.
From the independent.co.uk
Bats such as the serotine and brownlong-eared varieties are now breeding in roof spaces and can be seen hunting around the village, or on the wider estate up and down the farm tracks at night.
From the independent.co.uk
More examples
Common brown bat of Europe
The serotine bat Eptesicus serotinus is a fairly large European bat with quite large ears. It has a wingspan of around 370mm and often hunts in woodland. It sometimes roosts in buildings, hanging upside down, in small groups or individually. Its population is believed to be in decline.