These observations suggest that a vocal signature, which is present in some colonial species of bats such as Myotis lucifugus and which allows auditory discrimination between calling young, is less likely to occur in L. cinereus. ###>La «signature» vocale, qui existe chez certaines espèces coloniales de chauves-souris, par exemple chez Myotis lucifigus, et qui permet la discrimination auditive des petits, ne se produit donc probablement pas chez L. cinereus.