Ectadia fulva Brunner von Wattenwyl, 1893

Song.— Time-amplitude-pattern. The male calling song consisted of song units each lasting about 1.5 s repeated after an interval of about 4 s (Fig. 16A). Each was made of a series of microsyllables (about 15), repeated with 20 Hz, followed by a long series of impulses with decreasing intervals. This song unit is produced by opening the tegmina very widely, then closing and opening them several times only in part, resulting in the microsyllables. The microsyllables are not tick-like sounds as in E. diuturna sp. n., but consist of compact series each with a few impulses. Then the male closed the tegmina completely and very slowly. The contact of the scraper with the  ne basal part of the  le produced a long series of heavily damped im- pulses (Fig. 16; see also  g. 7 in Heller et al. 2014).

The female responded immediately after the end of the male impulse series (Fig. 16), typically with one or a few impulses, oc- casionally with one or a small series up to a few hundred ms later in addition. Sometimes responses were observed even before the male series had ended.

Carrier frequency.— Both parts of the song unit had a quite similar spectral composition with two peaks (Fig. 17). Besides a narrow low-frequent peak around 10 kHz there was a broad maximum at about 50-60 kHz. The female response showed a peak at 20 kHz, in width and placement intermediate between the two male peaks.

Besides the acoustical signals soundless vibratory body move- ments were observed in both sexes.[1]

References