The little mammals are accomplished vocalists — but some males are more accomplished than others.
An adult rock hyrax and five cubs. Males with a rhythmic courtship song father more offspring that reach their first birthday. Credit: Martina Katz/imageBROKER/Shutterstock
The rabbit-sized mammals called rock hyraxes sing to woo their mates. Vlad Demartsev at the University of Konstanz in Germany and his colleagues had noticed that their songs seemed to have a beat. The typical hyrax song has an ‘isochronous’ rhythm, which means that notes are spaced at regular intervals.
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