A total of 15 records from six males were examined. The calling song consists of phrases (Figure 2B) with irregular intervals. Phrases usually reach its maximum intensity between 1/4 and 1/3 of the phrase; however, in some of the phrases, there is often a more gradual crescendo roughly up to half of the phrase. Phrase durations vary between 2.29 and 4.18 s (3.21 ± 0.18), and the phrase comprises between 83 and 131 syllables (108.6 ± 5.56). The phrase generally begins with a characteristic isolated hemisyllable, which has variable amplitude and durations within intra and inter-populations of species (Termessos: 3–18 ms; Torbalı: 26–31 ms and Ahırlı: 15–23 ms) (Figure 2C). The isolated loud hemisyllable is followed by contiguous/ordinary syllables of phrase with a vari- able gap in duration within intra and inter-populations of species (Termessos: 25–276 ms; Torbalı: 24–28 ms and Ahırlı: 12–124 ms). Oscillographic analyses show that the syllable period duration varies between 25.01 and 46.47 ms (28.33 ± 1.83) and each syllable shows approximately a standard structure, which is formulated as soft opening hemisyllable + loud closing hemisyllable (Figure 2D). [1]
