Calling song (Fig. 27). Males produce a sequence of long macrosyllables or short echemes (0.07–0.12 s duration), evenly spaced by gaps (0.11–0.13 s duration), giving an overall rate of repetition of 4–6 macrosyllables per second (all statistics, n =4 recordings). At sporadic intervals these macrosyllables or echemes are interrupted by a much shorter macrosyllable (0.02–0.03 s duration) followed by a slightly longer gap (0.13–0.14 s duration). It is considered likely that the female would respond with a wing-flick during these longer gaps.
This species calls during the day and it is not known whether it also sings at dusk. The calling song maintains an even frequency distribution throughout, with a high amplitude plateau of 11.6–15.7 kHz and a dominant frequency of approximately 12.8 kHz. [1]