Montana striata (Thunberg, 1815)

Ivković, Slobodan, Iorgu, Ștefan, Horvat, Laslo, Chobanov, Dragan, Korsunovskaya, Olga & Heller, Klaus-Gerhard, 2017, New data on the bush-cricket Montana medvedevi (Orthoptera: Tettigoniidae), critically endangered in Europe (EU 28), and a comparison of its song with all known song patterns within the genus, Zootaxa 4263 (3), pp. 527-542 : 535

Montana striata (Thunberg, 1815) — Fig. 7 B.

Localities: Romania, Botoșani, Hilișeu-Horia , N 48°00.60', E 26°17.40', 210 m a.s.l., 25.vi.2012, leg. I. Ș. Iorgu (Iorgu et al. 2013) . Russia, Kursk (Centralno-Chernozemny Reserve), vii.2014 and 2015, leg. A. Benediktov, A. Mikhailenko (3 males) .

The calling song of this species is quite complicated. Two different echemes are combined to a phrase and this phrase is repeated in a fast sequence at least for a few minutes (longest uninterrupted recording 2 min). One echeme consists of three short syllables with high amplitude (syllable repetition rate ca. 60–70 Hz at 24–25°C), the other of five longer ones (syllable repetition rate ca. 20–30 Hz at 24–25°C; Fig. 7 B) with lower amplitude. When an animal starts to sing, it often produces only the high-amplitude echemes, separated by longer intervals, and then added the low amplitude echemes. In a recording lasting 15 minutes the animal omitted the low-amplitude echemes several times and used only the loud ones with the corresponding silent intervals.

Figures

FIGURE 7. Oscillograms of calling songs of Montana species. A— medvedevi, B— striata (left Romania, right Russia), C 1 — decticiformis (Shatpe 27 ° C + sun), C 2 — decticiformis (Zharmysh 20 ° C), D— taurica, E 1 — montana (Austria), E 2 — montana (Ukraine, 25 ° C), F— daghestanica, G— armeniaca, H— eversmanni (see text), I— tianshanica, J 1 — tomini (25 ° C), J 2 — tomini (16 ° C), K— helleri. See Table 2 and text for details.