Bioacoustics of Stenobothrus eurasius

Description of song: Stenobothrus eurasius eurasius can produce a very complex song pattern, especially in the courtship song. The calling song of this species consists of an unusually long phrase (32–57s). The beginning of phrase includes an irregular pattern as a noisy part in low amplitude ( Fig. 10 B) or several discontinuous parts. A phrase includes regular syllables (except several syllables at the beginning and end of the phrase) and the duration of the syllables range between 516 and 613 ms Syllables consists of two obvious parts ( Fig. 10 C). First part contains sharpen pulses in continuous crescendo from beginning to middle and decrescendo from middle to its ends ( Fig. 10 D). Second part of the syllable contains a few pulses group with a similar amplitude modulation ( Fig. 10 D). The number of these group ranges from 2 to 6 in this part. Although the numbers of pulse groups in the second part of the syllables are up to six, there are mostly two long pulse groups and several versions of it separated by gaps ( Fig. 10 C–D). Published song data, used for comparison : Berger 2008 .