Wall Street Journalのインスタグラム(wsj) - 12月1日 09時03分

Nobody beats the chinstrap penguin for its power-napping prowess. ⁠
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The penguins take thousands of micro-naps a day, each lasting just a few seconds, until they accumulate the equivalent of a good night’s sleep—in their case, around 11 hours of slumber in all.⁠
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No other animals have been seen taking such short naps as consistently, said Paul-Antoine Libourel, a sleep scientist at the Lyon Neuroscience Research Center in France.⁠
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Libourel and a team of researchers recorded this unique behavior in a chinstrap penguin colony on King George Island, some 75 miles off the Antarctic coast. Their findings were published Thursday in the journal Science. ⁠
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The study presents a rare look at sleep in the wild, said Vladyslav Vyazovskiy, a sleep neuroscientist at the University of Oxford who wasn’t involved with the work. Insights about animals’ sleeping habits come chiefly from laboratory studies, he said. “We know very little about sleep patterns in most animals.” ⁠
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Aware of this information gap, Libourel and Won Young Lee, an ecologist at the Korea Polar Research Institute, assembled animal and sleep experts to solve a chinstrap puzzle. ⁠
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Altogether, the research team gathered data from 11 birds over 11 days in December 2019. Video footage captured when the birds closed their eyes, and brain activity from the sensors indicated when the birds were napping. ⁠
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On land, the penguins napped over 10,000 times a day for an average duration of four seconds. They slept while standing, while lying down and sometimes with just one eye shut. On ocean forages, they slept while floating. ⁠
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Read more at the link in our bio.

Video: Getty Images

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