The vocal repertoire of this species consists entirely of monosyllabic calls. This description is not complete, however; the vocal components of mother-pup interactions and male courtship have not been documented so far.  Gc distress calls.wav Gc trills.wav Gc alert call.wav Gc modulated sweep.wavDistress calls are uttered whenever a bat is attacked by conspecifics or restrained by the observer. Trills are produced during aggressive encounters.  Approach pulses are produced whenever a bat is flying towards an already occupied roost (probably by the occupants and not by the approaching bat). Various social calls are uttered during tandem-flights and chases. It is unknown, however, whether they are used in an aggressive or affiliative context.  Alert calls are produced when bats are disturbed or when several individuals are circling around the same location (i.e., roost or nectar source). For one vocalization type, the social context in which it occurs is unknown. Knörnschild M, Glöckner V, von Helversen O. 2010. Acta Chiropterologica 12: 205-215. The wav files for download are shifted down in frequency and have a reduced sampling rate (100 kHz). |