Fig. 5. Courtship songs of the two closely related species Chorthippus albomarginatus (Germany, Bavaria, Erlangen, 20.07.1999) and Ch. oschei Hungary, Bekes, Battonya, 16.07.2002). For each species, the recordings of the leg movements (HL) and the sound recordings (S) are shown. In Ch. albomarginatus, three different elements (А, В, С) can be distinguished in the song, in Ch. oschei - five different elements. In the beginning of the С element, the legs of Ch. oschei move into an extra-high position and make a flicking out movement with the hind tibiae. The songs were recorded at the temperature +32^о С.