What Animal Sleeps The Least. One commonly cited statistic estimates they sleep only 30 minutes per day. Here are the animals that need the least amount of sleep:
Check out 10 most sleepiest animals on earth below. This behaviour is claimed to be full sleep (rest+higher responsivity threshold+homeostatic response); Here we take a look at the top 5 countries that get the least and most sleep.
So if the weather is not cooperating, they can actually sleep up to three years.
In fact, despite being the tallest animal, giraffes have the shortest sleep requirements of any mammal, sleeping an average of just 30 minutes per day. Unlike the previous animals on the list, they do not do this because of predation by other animals. In others, dietary needs may mean the animal literally spends most of his life eating and has little time for sleep. The handbook of behavioural neuroscience, chapter 24 (2019) mentions jellyfish as an example of animal that sleeps, even when no central nervous system is present.