Lesser Noctule (Nyctalus leisleri)
It is a medium-sized bat, slightly smaller than the common noctule. The face, ears and wings are dark, the fur is brown. The ears are short and rounded with a mushroom-shaped tragus. The wings are long and narrow. The frequencies used by this bat species for echolocation lie between 25–54 kHz, have most energy at 29 kHz and have an average duration of 8.5 ms.