“…Since then acoustic signals of many western European species have been carefully studied (e.g. Heller, 1984Heller, , 1988Heller, , 1990Ingrisch, 1991;Ragge & Reynolds, 1998;Heller et al, 2004;Warchalowska-Sliwa et al, 2008;Iorgu & Iorgu, 2012;Chobanov et al, 2013Chobanov et al, , 2017, but songs of species from southeastern Europe, Caucasus and Transcaucasia remain poorly known; sound signals are preliminarily described for only a few phaneropterids from these regions (Zhantiev & Dubrovin, 1977;Zhantiev & Korsunovskaya, 1986, 1990, 2015.…”