Montana striata
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 24–25oC), the other of five longer ones (syllable repetition rate ca. 20–30 Hz at 24–25oC; Fig. 7B) 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. [1]