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 song consists of chirps sounding rather like 'trrrrt' and lasting at least 1 sec. They are seperated by pauses of about the same length.
The calling song consists of a series of quiet echemes, each lasting about 1-2 s, sometimes repeated regularly at the rate of one every 3-4 s, but at other times less frequently and more irregularly. Oscillographic analysis shows eachecheme to consist of about 60-140 alternately quieter and louder closing hemisyllables following one another at the rate of about 40-70/s. The quieter closing hemisyllables last about 4-11 ms and the louder ones about 7-17 ms; opening hemisyllables, always quieter than the closing hemisyllables, are often also present. The echemes are usually quieter at the beginning, reaching maximum intensity after about 10-20 syllables. Sometimes the echemes end in aseries of lous closing hemisyllables without the interposition of quieter ones (Figs 340, 342), and occassionally there are two quieter closing hemisyllables between two consecutive louder ones. There are no microsyllables.