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 calling song of several males recorded in the field consisted of long, uninterrupted sequences of pairs of syllables (Fig. 6; syllable repetition rate 71.9–77.5 Hz, repetition rate of syllable pairs 22.7–26 Hz; time of recording 14:00–14:30; six males; T = 26 ◦ C; animals possibly in sun). In the laboratory the rhythm of the song was distinctly slower owing to the lower temperature (Fig. 6; syllable repetition rate 46.9 Hz, repetition rate of syllable pairs 14.7 Hz; time of recording 9:30 am; duration of recording 35 s; T = 22 ◦ C; animal in shadow). As for C. serengeti, the animals produced a short song very similar to that shown in Fig. 7 for C. serengeti. Each echeme consisted of a group of 12–15 syllables (syllable repetition rate 74–79 Hz; three males; field recordings) with quite variable intervals, mostly between 0.5 and 3 s. The song could not be heard with the unaided ear, its main components being in the ultrasonic range with a variable peak frequency between 22 and 39 kHz (four males; range 10 dB below peak from 20–27 to 25–48 kHz).