Variety classification: 1. Red kangaroo, the most famous kangaroo is red kangaroo, which is the largest and lives in the arid zone of Australia. The average annual rainfall in this zone is below 500mm. Because kangaroo's food contains a lot of water, it can survive in areas without running water. In fact, only male kangaroos are red and female kangaroos are gray-blue in red kangaroo, but red female kangaroos have also appeared under the conditions of group breeding and hybridization. 2. Great red kangaroo lives in the open grassland in southeast Australia. Red kangaroo is the largest marsupial and a representative species of kangaroo. It is the king of modern marsupials. This big red kangaroo looks like a mouse, like a giant mouse. Actually, it has nothing to do with rats. Its body hair is reddish brown, its body length is 130 ~ 150 cm, its tail length is 120 ~ 130 cm and its weight is 70 ~ 90 kg. Small head, long face and black beard on both sides of nostrils. Big eyes. Ear length. The appearance is strange and fascinating. They have small heads, big ears and big eyes. Adapted to the jumping lifestyle, the forelimbs are short and thin and can be used to grab food. The hind legs are strong and the toes are close together. One step can jump 5 meters and the speed can reach 40 ~ 65 kilometers per hour. When the tail grows up, it is the supporting organ when perching and the balancer when jumping. Red kangaroo mostly moves in the morning and evening, hiding in grass nests or shallow holes during the day. I like to integrate 20 ~ 30 or 50 ~ 60 group activities, mainly plant foods such as grass. It is timid and alert, and its vision, hearing and smell are very sensitive. Its long big ears can hear the slightest noise, so it ran away. 3. Eastern Grey Kangaroo The eastern grey kangaroo (Macropus giganteus) is not as famous as red kangaroo, but the eastern grey kangaroo is the most common. Live in a more fertile place. 4. Western gray kangaroo, the western gray kangaroo is the smallest of the three kinds of kangaroos: the adult male weighs 54 kg (1 19 kg). Living in the southwest coast of Australia and the Darling River basin. 5. Musk kangaroo, with a body length of only 15 ~ 20cm and a tail length of 12.7 ~ 15cm, is the smallest kangaroo in the world. Compared with the common kangaroos jumping on the grassland, they are typical dwarf species. They have lived in the tropical rain forest for more than 20 million years. Scientists are very worried about their survival and think they are vulnerable to environmental changes. 6. The short-tailed dwarf kangaroo is one of the smallest kangaroos, and its height is less than 60 cm. The short-tailed dwarf kangaroo is a marsupial mammal that looks like a mouse. Most of them live on Rotney Island off the southwest coast of Australia. Because of its chubby face and sweet smile, it is called "the happiest animal in the world", with only one species and no subspecies differentiation. It has been listed in the Red List of Endangered Species by the World Conservation Union.