Table 3 Comparisons of acoustic parameters of experimental and natural 3-note (“cu-cu-coo”) calls by one-way ANOVA.

From: Syntax errors do not disrupt acoustic communication in the common cuckoo

Acoustic parameter

Natural cu-cu-coo

Experimental cu-cu-coo

F

df

p

Length of call (sec)

0.626 ± 0.041

0.761 ± 0.025

79.258

1,18

 < 0.001

Minimum frequency (Hz)

469.5 ± 41.377

464 ± 16.633

0.159

1,18

0.695

Maximum frequency (Hz)

916.5 ± 80.693

714.2 ± 22.700

58.243

1,18

 < 0.001

  1. Mean values of call length (s), minimum frequency (Hz), and maximum frequency (Hz) is shown, together with standard deviation (± SD). This experimental call was constructed by repeating the first element in normal “cu-coo” calls, whilst the natural variant was not manipulated regarding syntax.
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