Starlings sleep less during summer and full-moon nights

Starlings sleep less during summer and full-moon nights
Flock of stralings by night. Credit: Sjoerd van Hasselt/Pixabay

Researchers of the University of Groningen and the Max Planck Institute have found that starlings sleep five hours less per night during the summer. Compared to winter, the birds take more mid-day naps and live under higher sleep pressure. During full-moon nights, starlings sleep around two hours less than usual. The findings of the study were published in the journal Current Biology on 19 March.

Sleep regulation in starlings is highly flexible and sensitive to , according to a new pioneering study conducted by researchers of the UG's Groningen Institute for Evolutionary Life Sciences (GELIFES), the Avian Sleep Group at the Max Planck Institute for Ornithology (Germany) and the Institute of Neuroinformatics, University of Zurich (Switzerland).

Data loggers

In this study, the researchers used miniature electroencephalogram (EEG) data loggers in starlings under semi-natural conditions, meaning the starlings that were housed together in a large outdoor enclosure with natural temperature and light. The results show that the birds displayed strong phenotypical variation in sleep-wake regulation.

Sleep is essential for our wellbeing and performance, yet our understanding of sleep is limited and often based on the studies of a few mammalian model species, conducted under strictly controlled laboratory conditions. Data on sleep in different species under more may yield new insights into the regulation and functions of sleep.

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More information: Sjoerd J. van Hasselt et al, Sleep Time in the European Starling Is Strongly Affected by Night Length and Moon Phase, Current Biology (2020). DOI: 10.1016/j.cub.2020.02.052
Journal information: Current Biology

Citation: Starlings sleep less during summer and full-moon nights (2020, March 19) retrieved 26 June 2022 from
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