Little is known about the biological rhythms that emerge from social behaviours in the wild. A study of shorebird pairs shows that rhythms of nest-incubation duties are mainly governed by strategies to avoid predators. See Letter p.109
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Buck, C. Wild times. Nature 540, 49–50 (2016). https://doi.org/10.1038/nature20481
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DOI: https://doi.org/10.1038/nature20481