Question 2: Are kangaroos rodents? Both Australian kangaroos and American opossums look like rats, and they are also named "rats". But they are not rats. What's going on here? Let's talk about kangaroos first. Kangaroo is a specialty of Australia and a national treasure of Australia. Their biggest feature is that there is a "bag" on their chest for raising children. Kangaroo's front and back limbs are not consistent, the first two limbs are small, and the last two limbs are particularly developed, and they jump when they walk. There are more than 5 varieties of kangaroos, which are as big as goats and weigh about sixty or seventy kilograms. Small as a rabbit; The smallest individual is as big as a big mouse. Although kangaroo is bigger than mouse in size, it is lower in evolution than mouse. Zoologists think kangaroos are lower mammals. Because the young of a general mammal develops in the placenta of its mother, it is called a mammal with placenta. Kangaroos, on the other hand, have no placenta, and their young are not only as thick as human fingers, but also in a very immature state. Kangaroo cubs arrive at the base of the mother's tail after being discharged from the mother's reproductive tract, and then waddle along the wet path licked by the mother to the mother's nursing bag and suck milk in the bag. After that, it will be several months before the cubs can complete most of their development. Zoologists believe that this way of raising children is far behind that of mammals with placenta. Because of this, kangaroos belong to the marsupials of mammals in animal classification. Rodents, on the other hand, belong to mammals. Therefore, we should not mistake kangaroos for rats just by looking at the literal meaning. Let's talk about opossum again. In America, especially in South America, there are many small and medium-sized animals called opossums. These opossums are divided into several kinds: small opossums that live in trees and look like mice, fluffy opossums with thick fur all over their bodies, and webbed opossums that are suitable for aquatic life ... But almost all opossums have the same feature, that is, they have sharp claws, long tails, are good at climbing, and can wrap themselves around branches upside down with their tails. The characteristics of opossum parenting are similar to kangaroos. The newborn opossum is only as big as a kidney bean. After the baby is born, the mother opossum puts it in the outer skin of her abdomen and feeds it for another two months. The name opossum comes from this. Because of this feature, animal taxonomists also classify them into mammalian marsupials. The young opossum can enter and leave the pouch freely after living in the pouch of the mother for two months, but they don't leave the mother. In about another month, you can leave your mother and live independently. Opossums are used to preying at night. They eat almost anything. It can be seen that the opossum we are talking about is also fundamentally different from the general rodent mammals, so it should not be attributed to rats.
question 3: are kangaroos rodents? Kangaroos, mammals, are distributed in Australia. There are 5 species of kangaroos with different sizes. The female kangaroo has a pouch in her abdomen. The fetus is not fully developed, so it needs to be fed in a warm pouch. The kangaroo is about 2 meters long and its tail is 1 meter long. It eats grass, shoots and leaves. More than a dozen kangaroos move in groups. The male kangaroo moves like a man in boxing when fighting for victory. The big gray kangaroo can jump 1 times when running. This may be the speed at a short distance. The stout tail plays a balancing role when jumping, and it supports the third leg when sitting.
Question 4: Which country is the kangaroo from Australia?
Marsupials are mainly found in Australia and its nearby islands, accounting for almost half of all mammal species in Australia. Among marsupials, kangaroos are the most famous and lovable rare animals, and most of them are distributed in Australia, so Australia.
Among them, the big red kangaroo has become a symbol of Australia, and even almost a synonym for Australia. There is a big red kangaroo painted on the national emblem of Australia; On the passenger plane of Australia international flight, there is also a big red kangaroo running; In addition, the big red kangaroo is also widely used as a trademark pattern.
marsupials, like monotremes, are relatively backward. Feeding offspring with a pouch looks decent, safe and comfortable. In fact, it is one of the slow-evolving animal species. Unlike Asia, Africa, America, Europe and other continents, Australia is home to many natural enemies of herbivores-large carnivores. If there were, the variety and quantity of marsupials would not be today. When African lions pounce on herbivores such as zebras and giraffes, they are often underage first. Because relatively speaking, parents run faster, and older people have more experience in escaping. Young children with marsupials are hiding in the pouch. If there are enemies, the cubs seem to be safer than "marsupials", but this can be bitter for the mother. How can she escape the pursuit? In the end, mother and son must both die.
Fortunately, Australia is an island country, surrounded by water, isolated from other continents, and it is inaccessible to beasts who hunt herbivores, thus becoming a paradise for kangaroos. Of course, some birds of prey (such as the wedge-tailed eagle) will also attack kangaroos, but they mainly prey on the young of small kangaroos and large kangaroos, and there is nothing they can do about adult kangaroos.
Although kangaroo doesn't look like a wild animal, it has a set of unique skills to resist the enemy. When desperate, it will cross the rubicon and fight to the death: it quickly jumps to the tree, puts its back against the trunk, and makes a scary sound. When the opponent approaches further, it will suddenly straighten its forelimbs, pierce two dagger-like sharp claws into the opponent's abdomen, grab the internal organs, or violently kick the opponent's abdomen with its hind legs, kicking it to death. If the kangaroo is near the water, it will jump into waist-deep water, turn around and wait for the other side to swim, then grab the other side's head with its forelimbs and press it hard under the water. At this moment, the other side has to struggle to escape to the shore, otherwise it will be drowned in the water.
In addition, the kangaroo's quick jump is also beneficial to escape the enemy. Sometimes, it will wave its long tail back at the intruder. Therefore, hundreds of species of kangaroo family live safely in a paradise, and they keep this primitive animal attribute to this day.
Question 5: What kingdom, phylum, steel, order, family and species do kangaroos belong to? Animal kingdom
phylum: Chordata
subphylum: Vertebrate
class: Mammalia
suborder: Amputa
suborder: Kangaroo <