BioAcoustica is a free, open repository of wildlife sound recordings from the Natural History Museum, London.
Taxonomic index of the BioAcoustica collection
Acoustic and biological measurements in the BioAcoustica collection
Recording annotations from ann-o-mate
The specimens that recordings are of, from the collections
Where the specimens that recordings are of were collected, not where the sound was recorded
In the calling song, pairs of syllables (di-syllabic echemes) follow each other in a dense sequence (intervals of 20 ms without wing movement between echemes; Fig. 7D). Only in the first syllable a very soft opening hemisyllable can be detected (recording of wing movement in OSF).