The Greater Noctule bat (Nyctalus lasiopterus), which weighs 35-53g with a wingspan of over 45cm, is Europe’s largest and rarest bat. Unlike all other bats in Gibraltar its diet does not consist exclusively of insects. The Greater Noctule also regularly preys on passerine birds which account for over 80% of its diet during the birds’ migration periods. It is also the only species of bat known to hunt birds in flight rather than capturing them when roosting.
The Greater Noctule is almost exclusively a tree-dwelling species but is also known to roost in bat boxes and parts of buildings like chimneys.
Its fur is reddish-brown to dark brown in colour and echolocates between 14-23 kHz which is also within the audible range of most humans.