What animals don’t sleep?

Some animals are capable of sleeping little or very little for long periods of time. These animals often make up for lost sleep in other ways to meet their physiological needs. Some animals that have trouble falling asleep or get very little sleep include:

Vervet monkeys (less sleep): Some species of vervet monkeys, such as gibbons, spend little time sleeping because they live in trees.

Cheetahs (Low Sleep): Cheetahs typically sleep very little, and they need to be constantly alert to potential prey and threats.

African elephants (less sleep): African elephants typically sleep relatively short periods of time in the wild, and because of their large size and need for large amounts of food, they need to spend more time looking for food.

Sharks (do not need to sleep): Sharks are not typical "sleeping" animals. Their brains can rest separately rather than entering a comprehensive sleep state.

While these animals have been found to be able to sleep little or not at all for longer periods of time, they often compensate to some extent for sleep loss in the form of rapid eye movement sleep (REM sleep). Such animals are often highly adaptable and can balance sleep and foraging. It is important to note that each individual animal and environment is different, so their sleep needs will also vary depending on their environment, behavior, and physiological state.

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