Table 1.
Basic parameters of the Aquatic Warbler Acrocephalus paludicola recordings (N = 40 birds).
| Song variable | Range | ± SD |
|---|---|---|
| Duration of recordings per male (s) | 49.6–1450.3 | 703.6 ± 281.65 |
| Number of song phrases per male | 25–648 | 235.4 ± 115.14 |
| Number of whistle phrases per male | 6–290 | 87.8 ± 52.65 |
| Number of rattle phrases per male | 19–340 | 142.2 ± 64.24 |
| Number of rattle-whistle phrases per male | 0–24 | 5.1 ± 6.61 |
| Number of A-songs | 1–118 | 44.4 ± 28.44 |
| Number of B-songs | 0–388 | 39.9 ± 61.09 |
| Number of C-songs | 3–50 | 22.7 ± 12.34 |
| Song duty cycle (%)* | 3.3–43.9 | 16.9 ± 7.21 |
| Ratio of whistle to rattle number | 0.21–1.13 | 0.61 ± 0.189 |
| Ratio of whistle to rattle duration | 0.31–1.19 | 0.73 ± 0.245 |
| Mean whistle phrase duration (s) | 0.35–0.86 | 0.52 ± 0.119 |
| Mean rattle phrase duration (s) | 0.29–0.73 | 0.44 ± 0.089 |
| Mean rattle-whistle duration (s) | 0.32–2.52 | 0.89 ± 0.349 |
| Enumerated repertoire size of phrase types | 11–158 | 87.5 ± 40.54 |
| Phrase type switch rate** | 0.52–1 | 0.89 ± 0.087 |
| Category phrase switch rate** | 0.33–0.86 | 0.59 ± 0.111 |
*Percentage of time spent singing in the total recording time.
**Switch rate is the number of switches from one phrase (category) type to a different one, divided by the total number of possible switches within a recording, which is equal to the number of phrases minus one. The switch rate may range from 0 to 1, where 1 means that a male switches to a different phrase or category type every phrase.