A small vocal repertoire during the breeding season expresses complex behavioral motivations and individual signature in the common coot

Table 5 Parameters and definition of various vocal parameters measured for each call types

Parameters	Definition
Harmonic	A series of musical tones with several times frequencies of F₀.
PF	The frequency of maximum energy in the power spectrum of a target syllable.
F₀	The frequency of the first harmonic peak in the power spectrum of a target syllable.
F_0max	Highest frequency of the first harmonic of a target syllable.
F_0min	Lowest frequency of the first harmonic of a target syllable.
T	Total duration of a target syllable.
TI	Duration between a syllable and a next one.

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