The animal that sleeps for almost 20 hours a day is the koala, which is native to Australia. Despite being classified as a bear, koalas are not particularly active and spend most of their time sleeping or resting in trees. They have a low metabolic rate and obtain most of their energy from the eucalyptus leaves that they eat, which are low in nutrients. Sleeping foralas have a unique lifestyle and diet. Their diet is mostly eucalyptus leaves, which are low in nutrition and hard to digest, so they must devote much of their time to sleeping to conserve energy. Koalas are also very selective in their diet and will only eat certain species of eucalyptus leaves.
While they are known for sleeping for long periods of time, they are not true hibernators. Instead, they go into a state of torpor, where they lower their metabolic rate and conserve energy, but can still wake up and move around if necessary.
Koalas are an iconic species in Australia and are a popular tourist attraction. However, their populations are threatened by habitat loss, disease, and other factors, and conservation efforts are necessary to protect them.