The range of 9 call parameters and its consistency measured by calculating repeatability (r).

aThe mean and range of parameters were obtained from 68 calls of 68 different male cuckoos. bRepeatability calculation and following tests were conducted using 45 calls from 9 individuals (5 calls per individual). T1 = duration of syllable 1; pause = temporal gap between syllables 1 and 2; T2 = duration of syllable 2; PF1 = peak frequency of syllable 1; PF2 = peak frequency of syllable2; F1H = highest frequency of syllable 1; F2H = highest frequency of syllable 2; F1L = lowest frequency of syllable 1; F2L = lowest frequency of syllable 2.