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
The quiet and mainly nocturnal male calling song consists of sequences of 'itck'-like syllables lasting about 3-5 s and separated by intervals of about 4 s or more. Within each sequence the syllables are grouped into a characteristic rhythym. There are usally 3-5 groups, each containing 1-4 syllables; the groups are separated by intervals of about 400-800 ms, and within each group the syllables are separated by intervals of about 60-120 ms. Each 'tick'-like syllable is produced by a closibng stroke of the fore wings lasting about 6-10 ms.
The song is produced at dusk and in the night. It is audible from about 1m and consists of 'tsp'-sounds, which are grouped into a series of one to four. Three to five such series in turm form a phrase which has a total duration of 2-3 sec. and is seperatedf by a longer interval from the next one. Such a phrase can ber represented in the following way: 'tsptsp-tsptsptsp-tsptsp-tsp'.