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
Totally 12 records from two males were examined. The calling song consists of phrases (Figure 4B) with irregular intervals. Phrase durations vary between 0.93 and 1.07 s (1.01 ± 0.04), and each phrase contains 31–37 syllables (33.3 ± 1.5). The phrase generally begins with an isolated first hemisyllable and is followed by a gap which lasts for 8–19 ms (13.6± 3.6). After the gap, the phrase continues with 2–3 higher amplitude syllable group and a 2–4 lower amplitude syllable group (generally corresponds to 1/8 of phrase), then reaches the highest amplitude after this part and goes along with ordinary syllables which have a quite similar amplitude (Fig 4C). The oscillographic analyses show that the syllable periods duration varies between 21.20 and 38.21 ms (26.35 ± 1.98), and each syllable shows a standard structure, which is formulated as soft and long opening hemisyllable + loud and short closing hemisyllable (Figure 4D). The opening hemisyllables duration varies between 7.59–21.46 ms (16.39 ± 1.82), while the closing hemisyllable lasts for 6.80–17.53 ms (9.96 ± 1.46).