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Sleep with one eye open and only half of their brain at a time, which is called unihemispheric sleep.
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Ants
Take brief naps throughout the day, totaling around 250 minutes of sleep per day.
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Can go without sleep for long periods of time and use rest to conserve energy.
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Get a mere two hours of shut-eye per night and can skip a night's sleep without needing to nap the next day.
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Sleep for short bursts, totaling around 30 minutes per day. They can spend several weeks without sleeping.
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Also known as killer whales, babies spend their first few months without any sleep
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Can stay in the air for months without landing or sleeping. They sleep on the wing for brief periods during migration.
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Can go for 84 hours with no sleep. They can sleep anywhere on land, on the bottom of the ocean, or floating.
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