Bioacoustics of Yoyetta nathani

Calling song ( Figs. 5–6 ). The male calling song of Y. nathani sp. nov. at rest is series of 3–4 clicks, which is occasionally followed by a short buzz. Closer examination of the calling song (all statistics, n =5 recordings from Goonoowigal SCA and Copeton Dam localities) is shown in Fig. 5 , indicating each ‘click’ is a macrosyllable comprising between 4 and 9 coalesced syllables ( 0.011 – 0.031 s; Fig. 5C ). A brief gap between 0.116 and 0.173 s duration punctuates each macrosyllable. The ‘short buzz’ is an echeme that varies from 0.047 and 0.184 s duration. The gap between each calling song sequence (i.e., clicking and short buzz) ranges from 0.370 to 0.457 s duration. Males may also flick their wings after 1-3 clicks as illustrated in Figs. 5 and 6 . Noting the limitations on iPhone recordings in the Methods and Terminology section, the approximate frequency plateau ranges from 5.2–12.6 kHz, with an approximate dominant frequency between 5.8 and 10.9 kHz ( Fig. 5E ). Yoyetta nathani sp. nov. calls at rest, and occasionally, in flight.At Goonoowigal SCA, calling did not commence until around 1000-1100h (AEDT), where males sang in a chorus lasting around 0.5-1 minute at intervals of around 10 minutes in sunlight. Cloud cover delayed and reduced singing, though males have been observed calling in warm, overcast conditions, during light precipitation and immediately following storms. At Copeton Dam and west of Armidale, individuals called for the same length of time but around every 5 minutes, constantly moving positions. Males could be attracted by finger snapping. The male calling song of Yoyetta nathani sp. nov. is similar to that of Yoyetta tristrigata (Goding & Froggatt) but the latter differs in its higher frequency and the absence of a short buzz at the end of its 3-4 tick phrase.