The common serotine is a large insectivorous bat found across Europe, east to Siberia and India, as well as in parts of northern and western Africa. It is one of the largest and best-known of Europe's bats, where it also roosts in houses. It is a large, heavy bat (about 30 g), appearing somewhat cumbersome in flight.

Common serotine, Eptesicus serotinus. In Europe it is also found roosting in human dwellings © עזרא חדד

Frequency: 25-30 (15-65) kh
Recordings and spectrograms on the page Common serotine in the sound library
bio.bris.ac.uk