Chinstrap penguins (Pygoscelis antarcticus) are generally considered to be the most aggressive and ill-tempered species of penguin.
Chinstrap penguins microsleep over 10,000 times a day and accomplish this in 4 second bouts of sleep.
https://video.nostr.build/1153910fbeee6c82f9dacef85b9c7959522880f3a3af4f59e475df395d1506be.mp4
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