The song consists of a trail of chirps produced approximately one each second (in males singing alone; in laternating males the chirp rate is slower). Each chirp consists of two parts - the first half consists of pulses with a period of approximately 20 ms, the second half contains chirps witha period of approximately 40 ms; during the second half the pulse period becomes steadily longer. The carrier frequency of pulses is about 4.5kHz betwen 20°C and 24°C.
Males may alternate in their chirping such that one male places his chirps halfway between two successive chirps of a neighbouring male. In these periods of alternation there may also be longer bouts of sychronized, i.e., simultaneous chirping. In alternating males teh chirp rate is slower (Fig. 2). [1]
References
- . A New Species of Damaracheta from South Africa. Journal of Orthoptera Research. 1998;(7):241. Available at: http://www.jstor.org/stable/3503526?origin=crossref.