Table 3 Means of acoustic parameters of calls b8, b9, c5, c6, d3 and d6, which are shown ± SD. n is the number of individuals
Call type | Behaviors | Peak frequency (PF, Hz) | Fundamental frequency (F0, Hz) | Maximum frequency of F0 (F0max, Hz) | Minimum frequency of F0 (F0min, Hz) | Duration of syllable (T, s) | Interval of syllables (TI, s) |
|---|---|---|---|---|---|---|---|
b8 | leaving nest | 5553 ± 206 (n = 1) | 727 ± 60 (n = 1) | – | – | 0.044 ± 0.005 (n = 1) | 1.842 ± 0.262 (n = 1) |
b9 | communication with nestlings | 4240 ± 1938 (n = 1) | 666 ± 128 (n = 1) | – | – | 0.045 ± 0.007 (n = 1) | 0.784 ± 0.040 (n = 1) |
c5 | back to nest | 1265 ± 593 (n = 1) | 985 ± 185 (n = 1) | – | – | 0.012 ± 0.003 (n = 1) | 1.111 ± 0.116 (n = 1) |
c6 | in the nest | 1075 ± 464 (n = 3) | 795 ± 140 (n = 3) | 1096 ± 83 (n = 3) | 485 ± 120 (n = 3) | 0.013 ± 0.010 (n = 3) | 1.326 ± 0.090 (n = 3) |
d3 | forage | 4444 ± 159 (n = 3) | 4444 ± 159 (n = 3) | 5300 ± 287 (n = 3) | 3567 ± 100 (n = 3) | 0.034 ± 0.007 (n = 3) | 1.090 ± 0.224 (n = 3) |
d6 | in the nest | 4833 ± 1341 (n = 1) | 4378 ± 97 (n = 1) | 5058 ± 267 (n = 1) | 3653 ± 68 (n = 1) | 0.038 ± 0.012 (n = 1) | 1.149 ± 0.116 (n = 1) |