Koalas belong to the genus Koalas, belonging to the Koalas family. Koalas are stout; Big head; Earrings; Tailless; The nose is big and bare, spoon-shaped; The coat is thick, and the Mao Mao color on the back varies from light gray to chocolate. Abdominal hair is white; Small eyes; The mouth of the breast-feeding bag is controlled by sphincter to prevent the baby from falling. Koalas are named after their appearance like bears. Koalas are endemic to Australia, distributed in southeastern Queensland, eastern New South Wales, southeastern South Australia and Victoria.

Koalas live in open eucalyptus forests and spend most of their lives on eucalyptus trees. Koalas sleep 17-20 hours a day; Night walk; Slow action; Territory, marked by leaving excrement at the bottom of the tree; Non-social animals; Adult males threaten their opponents and attract their spouses by shouting loudly; Mild temperament. Koalas feed on eucalyptus leaves and their shoots. The breeding season of koalas is from mid-spring to early autumn, with 33-35 days of pregnancy, 1 offspring and occasionally twins, usually once every two years. The life span of koalas is 13- 18 years.

Introduction to the morphological characteristics of koalas

Koalas have smaller brains, which may also be an adaptation to their low-energy food. The brain is an organ with high energy consumption, which will disproportionately consume a large part of the body's total energy budget. The relative brain capacity of koalas is almost the smallest among marsupials found.

The average weight of koala brains distributed in southern Australia (with an average weight of 9.6 kg) is only about 17 g, accounting for only 0.2% of the body weight. Compared with its size, koala's cecum is the longest of all mammals, reaching 1.8-2.5 meters, which is three times or even longer than its body length. It has been reduced to/kloc-0 premolars and 4 molars, and each jaw has a wide and high tip. ?

The above contents refer to Baidu Encyclopedia-Koala.