Localities: Bulgaria, Rila Mts, above Bistritsa Vill., 1150–1300 m (N 42°05', E 23°13'), 27.vii.2016, leg. D. Chobanov. Republic of Macedonia, Cer southeastern of Kičevo (N 41°25', E 21°03'), 9.viii.1981 (Heller 1988). Republic of Macedonia, Titov Veles, Lake Mladost, 3.viii.1997, leg. Fer Willemse. Serbia, Miratovac (N 42°16', E 21°38'), 18.vii.2013, leg. S. Ivković & L. Horvat.
In the calling song, two types of verses are observed, short and long ones. The short verses start with a few (2–3) long syllables, called macrosyllables, which contain a series of impulses, and are followed by a short series of microsyllables (for details see Heller 1988). The long verses consist of a sequence of three-syllabic echemes. The first two syllables of each echeme are shorter and softer than the last one. Typically, a long verse follows immediately after a short one (Fig. 8 C).