Montana montana
In the calling song verses of 1–2 s duration often alternate with pauses of about 3–4 s. According to Ragge & Reynolds (1998) and sound files in Roesti & Keist (2009) the verses consist of sequences of disyllabic echemes with syllable repetition rates around 40 to 70 Hz and echeme repetition rates of 15 to 30 Hz (Fig. 7E1). In two other recordings the echeme structure of the song could not be identified (Table 1). However, animals from Ukraine obviously had a much lower syllable repetition rate. Their song did not show an echeme structure, but the syllable repetition rate agreed quite well with that of the echemes in the topotypical Central European populations (Fig. 7E2). The number of teeth in the stridulatory file did not differ between localities (Fig. 6B; Table 1). [1]