Bats can use echolocation calls for individual recognition

Many animals use vocalizations to communicate either within or among species. The vocalizations can contain information of many different types such as identity, gender, territory, health or sexual motivation and it has even been shown that several species can recognize individuals only by means of their social vocalizations. In bats, social vocalizations consist of an important part of their vocal repertoire. They have been characterized for many species and were shown to contain individual signatures (e.g. Fenton et al 2004)