Bioacoustics of Chorthippus (Glyptobothrus) mollis mollis

Comparative notes . In males from Central Asia the songs are shorter than in West European ones (5–8 s and 15–30 s, respectively). Also , the songs of males from Central Asia end abruptly, whereas in European males echemes in the end of a song usually (but not always!) become more spaced out and progressively quieter ( Ragge & Reynolds, 1998 ). In males from semideserts and deserts of the Lower Volga Region song duration ranges from 6 to 35.5 s and about 60% of songs end with quieter pulses without characteristic “click” (Savitsky & Lekarev, 2007). Thus, the differences between the songs of European and Central Asiatic males are apparently the result of clinal variation and give no grounds for description of a separate subspecies.