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A comment on Why birds do not fall while sleeping. Parent comment

Re:Why birds do not fall while sleeping by HarHarVeryFunny on Thursday October 17, 2024 @11:25AM (#41870536)
I think all aquatic mammals do this - they don't have much choice since they need to surface to breathe, so need to be semi-awake all the time.
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Re:Why birds do not fall while sleeping by yencabulator on Wednesday October 23, 2024 @11:38PM (#41931663)
Not walruses: https://animals.howstuffworks.com/mammals/walrus-sleep-witho...

Not otters: https://www.animalwised.com/how-do-otters-sleep-4669.html

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