[How do mother and young of the bat Myotis myotis recognize each other after mother's return from a hunting flight?].

Mouse-eared bats leave their young at their sleeping place during the nocturnal hunting flight. The young wait for their mothers' return crowded together in small groups. It is examined whether mother and offspring recognize each other upon the mother's return. It is experimentally shown that each recognizes the other by smell and ultrasonic sound.