Kangaroo (Macropodidae) - Ancient baby animal

Photo: Chaffeezoo

Kangaroo is a famous animal in Australia, to Australia's Coat of Arms, a big kangaroo is also drawn.

Australia is a kangaroo paradise, with more than 50 varieties. The morphological characteristics are not the same, big and small. The red Kangaroo and gray Kangaroo can be said to be "giant", the body is 2.76m long; weighs 75-80kg. The kangaroos are only about 5cm long; weighs 4g, has a very good drought-tolerant and hot-tolerant kangaroo, and also knows how to drink sea water.

Kangaroos are good at dancing, relying on healthy hind legs to jump on foraging. It has a long and strong tail. When sitting down, the tail and leg muscles create a very stable leg. When jumping tail works to balance the body like a "jumping bridge", it makes the kangaroo jump both far and fast. When jumping quickly it can reach a speed of 60km / hour, it can leap through obstacles 2-3m high, 7-8m far away. The strange thing is that the slower the kangaroo runs, the more energy it takes, increasing to a certain extent, the lower the energy consumption.

Kangaroos live in grasslands and deserts. When drought, it has the ability to save water and heat dissipation, and can dig wells about 1 meter deep in the desert to save themselves. Kangaroos are normally very gentle, obedient, not actively attacking. But when he was angry he rushed into a tenacious fight.

Picture of raising children in Macropodidae's pocket weighs 0.5-0.75g; no hair is no shape. Ask my mother to lick open the way, the newborn mouse fumbles with his front limbs and relies on his sharp sense of smell, crawls into his mother's pocket, closes his mother's nipples in his pocket to "or eat quickly". By 200 days later, baby kangaroos can stick their heads out, or go out of activity. But whenever it is in danger, it drops right back into the mother's pocket and the mother brings the child to jump away. When children are grown up, they can make a living by themselves, their children do not put in their bags anymore.

The reproductive ability of kangaroos is terrible. When the child in the bag knows how to feed, the second child is born, and can conceive the third child.

Based on fossil records, kangaroos appeared in Australia 25 million years ago.