Koalas are Australia's national treasures and a rare and precious primitive arboreal animal in Australia. Koalas are not bears, but belong to marsupials and koalas. Bears are carnivores, but koalas eat plants. So other than being cute as a teddy bear, koalas have nothing to do with bears.

An adult koala is about 70-80 cm long and weighs about 10 kg. The body is light gray to light yellow, with a relatively bright color around the belly and a large, rounded nose that is bare. They have round heads, fluffy ears, very strong claws on their forelegs, and are good at climbing.

The koala was only discovered at the end of the 18th century, and the large-faced, big-nosed bear with gray-white fur quickly gained popularity among the masses.

Koalas like to be active at night and sleep for more than ten hours a day. So they sleep during the day and come out at night. Koalas are particularly active at night, which is related to their living habits. During the day, the temperature is high, the body consumes a lot, and it is not easy to accumulate energy. Usually, koalas curl up in the trees during the day, and when it gets dark at night, they come out to move. Koalas like to live on eucalyptus trees, eat eucalyptus leaves, and live a carefree life.

Koalas have strong and well-developed limbs, four sharp and powerful claws, and a strong sense of balance, which is very beneficial for climbing trees. This makes it difficult for them to fall off the tree and can live in the tree for a long time.

Koalas like to stay on trees and eat leaves, rarely come down to play, and do not like to drink water. Leaves are their favorite food. In the daytime, the koala sleeps drowsily in the tree, and has a variety of sleeping positions. Whatever happens under the tree will not disturb it. Koalas have slow reflexes and extremely long reflex arcs, often taking a long time to react.

The only food for koalas is eucalyptus leaves, but eucalyptus leaves are poisonous. Everyone's impression of koalas may be that they love to sleep. They sleep for 20 hours of 24 hours a day, and the remaining hours are also foraging. In fact, this is not because koalas are lazy, but because they need to expel toxins from their bodies when they sleep. The koala's liver is very peculiar. It can separate the toxic substances in the eucalyptus leaves. The sleeping time of the koala is used to digest the toxic substances. The seemingly dull koala is actually sluggish because of poisoning!

The number of koalas has also become less and less with the development of human beings, because humans have destroyed the living space of koalas. Human destruction of trees has brought a great impact on the life of koalas. Forests have been burnt, climate change is very large, and various disease threats are causing the koala population to continue to decline. This is a disaster for koalas. The Australian government is taking measures to ensure that the living environment of koalas can be improved, which is very important to koalas, and it is also related to whether koalas can live longer on the earth.