Calling song (Fig. 23). The calling song contains a set of repeated phrases of variable duration. Each phrase contains 4–10 (typically 4–7) long echemes, each 0.326–0.411 s duration and separated by gaps of 0.041–0.081 s duration (all statistics, n =3 recordings). Each phrase ends with a slightly shorter echeme (0.278–0.306 s duration), short gap (0.020–0.026 s duration), a macrosyllable (0.047–0.064 s duration) and a longer gap (0.153–0.172 s duration). It is anticipated that females respond during the gap following the macrosyllable at the end of each phrase, although there are presently no observations to support this prediction.
This species calls during the day and is not known to sing at dusk. The calling song maintains an even frequency distribution throughout, with a high amplitude plateau of 9.7–14.2 kHz and a dominant frequency of approximately 10.2 kHz. [1]