The spectral (above) and temporal (bellow) parameters used in the analyses performed in this study. Abbreviations: CD Call duration; ND Note Duration; PN Pulsed note; NPN Non-Pulsed Notes IN Intervals between notes; PD Pulse duration; IP Intervals between pulses; DF Dominant frequency; MinF Minimum frequency; MaxF Maximum frequency; Estf Start-frequency; Endf End-frequency; Harmonic Series series of harmonics visible in the frequency spectrum (1f0 = first harmonic, 2f0 = second harmonic, 3f0 = third harmonic, 4f0 = fourth harmonic)