Bioacoustics of Asiophlugis temasek

Distribution. PENINSULAR MALAYSIA ( Johor State : PFR) [new]; SINGAPORE Calling song (1♁, 26.2°C) ( Fig. 17 ). As described by Tan et al . (2019) , the calling song is made up of a rapiddecay pulse and repeats in a series. However, the male from PFR produce pulse with much shorter duration than both subspecies of Asiophlugis temasek reported in Tan et al . (2019) : 3.3±0.4 ms (2.5–4.0 ms). Consequently, the pulse repetition rate is also much higher at 187±15 pulses s−1 (160–215 pulses s−1 ). The average down-time between consecutive pulses is also lower at 2.1±0.4 ms (1.3–2.8 ms). The calling song has a completely inaudible (to humans) and broad-based spectrum with the average peak frequency of 57.4±1.1 kHz (55.3–58.8 kHz), very similar to the values reported in Tan et al . (2019) . That the time domain of the calling song of A. temasek is highly variable and the frequency domain seemingly conserved suggests that perhaps the frequency domain is more important in conspecific recognition than the temporal domain. This postulation requires further testing.