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
| 19/8/1983, 27°C, position-detection lamp (Racal with B&K 1/2" or 1/4", tape no. R83-4) | 0:15 |
Typically, the males produce their calling song in the evening and at night. In the re- corded males, the calling song consists of a long series of echemes, each echeme lasting for 426–583 ms (mean ± SD 503.87 ± 46.81 ms) and containing 8–10 syllables (mean ± SD 8.49 ± 0.52) (Fig. 4). e recurrence rate is fairly 20–30 / minute, the echeme repetition period being 2122–2760 ms (mean ± SD 2408.28 ± 197.71 ms). Syllables are quite short (39–54 ms, mean ± SD 47.28 ± 4.1 ms) and consist of two distinct parts: a shorter, lower amplitude opening hemisyllable (15–20 ms, mean ± SD 17.55 ± 1.64 ms) and a longer, higher amplitude closing hemisyllable (20–39 ms, mean ± SD 29.73 ± 4.49 ms). Acoustic signal amplitude modulation pattern is increasing and decreasing in both the opening and closing hemisyllables. The detailed descriptive statis- tics of the song characters are presented in Table 1. e calling song has the dominant frequency components between 7 kHz and up to more than 45 kHz (45 kHz being the upper limit of microphone frequency response in our recordings), with a main peak at about 12 kHz in both opening and closing hemisyllables (Fig. 5).