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
Twelve records from two males were examined. The calling song consists of phrases (Figure 7B) with irregular intervals. Phrase durations vary between 0.48 and 0.61 s (0.55 ± 0.04), and each phrase contains 23–28 syllables (24.91 ± 1.67). The phrase generally begins with a first loud hemisyllable, which is lon- ger than ordinary syllables and lasts for 14.72–21.77 ms (16.84 ± 1.87). The phrase starts with lower amplitudes syllables and reaches maximum amplitude (generally corresponds to 1/2–1/3 of phrase) with low gradual increase (Figure 7C). The remaining syllables in the phrase have quite similar amplitude. The oscillographic analyses show that syllable periods duration varies between 14.00 and 32.11 ms (20.81 ± 2.19), and each syllable has a standard structure which is formulated as loud and long opening hemisyllable + soft and short closing hemisyllable (Figure 7D). The opening hemisyllables duration varies between 5.54 and 21.83 ms (11.75 ± 1.83) while closing hemisyl- lable lasts for 6.53–14.05 ms (9.09 ± 1.10). The phrase ends irregularly with last hemisyllable, which has a shorter duration and a low amplitude than the previous hemisyllables in phrase and its duration varies between 4.01and 6.03 ms (4.76 ± 0.51).