Oscillographic representation of the male and female songs of P. vodnensis from Bonche vill., Mariovo, North Macedonia, 1000 m alt. Song recording at T = 25.5°C. A A frame of 1 min. with the male song above and female song below; B example of a male calling (above) and female responding (below) syllables (female song of a single main syllable followed by after-clicks); C example of a male calling (above) and female responding (below) syllables; single syllable (female syllable of two main impulses followed by a quiet buzz); D example of a bi-partite male song (two type of syllables). Frames of B–D correspond to 100 ms.