1. Repetitive series of midshipman growls.
Repetitive series of midshipman growls. An example waveform of a 2 min 25 s duration continuous recording from a single type I male midshipman nest showing the variability in duration, amplitude and amplitude modulation (AM) of 15 serially repeated growls. The sound was bandpass filtered from 15 to 500 Hz to remove incidental background noise from the waveform. Recorded on 22–23 June 1997 at 16.14°C.
Eileen L. McIver et al. J Exp Biol 2014;217:
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