How do polar bears spend winter?

Question 1: How do bears spend the winter? 1, bears are the most terrestrial animals living in cold areas, and they are also one of the most famous animals that hibernate through the cold. Before hibernation, they have to do a series of preparations.

In late autumn, the black bear spends 20 hours a day foraging in the mountains, and devours it for about a month, so that when he hibernates in the cave, his body has become round and fat, with a full increase of 40 kilograms.

After hibernation, its energy source is the fat stored in the body. When the weather is warm, the bear wakes up from his winter sleep. It will lick the moss on the rock with its tongue first to remove the impurities in the stomach and strengthen the gastrointestinal function that has not been used for a long time, and then hunt, which will be more delicious and will not go bad.

Bears hibernate because it is difficult for them to find food in winter, so they have to hibernate to minimize metabolism and reduce consumption. Bears have a special ability to decompose toxins produced by metabolism into harmless substances and reuse them. But we humans don't. If toxins accumulate, humans will die within a week. Bears can also recover water from their bodies through this biochemical reaction, so they don't need to pee when hibernating.

Question 2: Why do polar bears hibernate? From the perspective of ecological balance, if giant polar bears wander around the grassland, it will not only pose a great threat to the survival of a small number of reindeer and musk oxen, but also compete with wolves for food and make them hungry. Perhaps it is the thoughtful and ingenious arrangement of the creator, or perhaps polar bears disdain to associate with wolves. The central area where polar bears live is on the ice sheet. Because there are a large number of walruses and seals, except for a few killer whales, there are basically no natural enemies, and their huge and fat bodies must be eaten by a powerful and greedy animal, so polar bears just find a place to use. In this way, polar bears have established their undisputed dominance in this boundless world of ice and snow, and become the masters of this white kingdom, so they don't have to go to land to compete with poor wolves for food. Nevertheless, polar bears are still land animals.

Polar bear is one of the biggest beasts on land today, distributed in the Arctic Ocean and other islands, as well as the Asian-American continent and its adjacent coasts. In the Arctic, polar bears haunt all the year round. But it is rare in severe winter, because they have a special habit-hibernation, they can't eat for quite a while, and their breathing frequency is extremely low. But unlike the general biological hibernation, it is not a big sleep, but seems to wake up, and can wake up immediately in case of emergency, so its hibernation is called local hibernation or hibernation.

Recent research also shows that polar bears can not only hibernate, but also sleep in summer. Canadian animal experts once caught several polar bears in Hudson Bay in autumn and found that their paws were covered with long hair, which indicated that they had been inactive for a long time and only spent this time in summer sleep.

Polar bears are covered with thick white hair, even ears and feet, with only a small black nose. Moreover, its wool structure is extremely complex, and its interior is hollow, which plays an excellent role in heat preservation and insulation. So polar bears can easily walk on the ice floes without worrying about the cold in the Arctic. Polar bears are streamlined and good at swimming. Their claws are as wide as sculls. Therefore, in the icy waters of the Arctic Ocean, they can paddle forward with their two front legs and their rear legs, control the direction of progress and act as a rudder. They can swim 40 to 50 kilometers at a time. Polar bears have claws like iron hooks and extremely sharp teeth. With a wave of its front palm, it can smash a person's head into pieces. Polar bears run like lightning, at a speed of 60 kilometers per hour, but they can't last long and can only sprint for a short distance. So if you are attacked by a polar bear in the Arctic, you can negotiate with it for a long-distance race, so the polar bear will definitely lose.

Polar bears are carnivores and feed on seals. Every spring and early summer, groups of seals lie on the ice to bask in the sun. Polar bears will carefully observe their prey and then skillfully use the geographical situation to approach the seals step by step. When they reach the effective fishing range, they will rush like arrows. Although the seals are always careful, it is too late to find them. Huge claws were photographed at lightning speed, and their brains were painted all over the floor.

In winter, polar bears will wait for seals for hours at the breathing hole of the ice sheet with amazing endurance, concentrate and motionless, and cover their noses with their palms like snowdrifts to avoid being scared away by their own smells and breathing sounds. As soon as the long-awaited seal appears, the long-awaited polar bear will slap the seal on the head at an extremely fast speed. Before the poor seal knows what happened, his brain will splash and he will die.

For those seals lying on ice floes, polar bears also have a set of ways to deal with them. It will give full play to its swimming expertise, quietly and secretly approach seals from the water, and sometimes push an ice floe as a cover. After catching the seals, they will have a good meal and then leave. The cleverness of a polar bear is that if it meets a seal while swimming, it will be indifferent, just like turning a blind eye. Because it knows that in the water, it is no match for seals. Instead of fighting to the death, it is better to release the seal without consuming your own physical strength.

Question 3: How do polar bears live when winter comes? Generally speaking, polar bears are very active in March and May every year. They wander around the ice floes for food and live an amphibious life. In the severe winter, the outdoor activities of polar bears are greatly reduced, and they can hardly eat for a long time. At this time, they look for shelter and sleep on the ground. The respiratory rate decreases and enters local hibernation.

The so-called local hibernation, on the one hand, means that they don't hibernate like snakes and other animals, but like to sleep or not, and they can wake up immediately in case of emergency to cope with changes. In addition, polar bears just don't eat or drink for a long time, not all winter.

Scientists have also suggested that polar bears may also have partial summer sleep, that is, during the period when the ice floes are the least in summer, polar bears may find it difficult to eat or may be in a state of partial summer sleep. One of the reasons is that Canadian polar bear experts once caught several polar bears with long hair on their paws in Hudson Bay in autumn. Experts speculate that they have little foraging activity in summer, otherwise their claws will not be covered with long hair.

Polar bears are such excellent swimmers that they were once considered as marine animals. Polar bears spend most of their lives (about 66.6%) in a "static" state, such as sleeping, lying down, or waiting for prey. The remaining 29. 1% of the time is walking or swimming on land or ice, 1.2% of the time is attacking its own prey, and the last time is basically enjoying food.

Sometimes the prey that polar bears catch hard will attract the same kind of peeping. Generally speaking, smaller polar bears are more inclined to run away if they are unlucky enough to face those big guys. However, in order to protect the cubs or defend the hard-won rations, the mother bear who is nursing her cubs sometimes fights with the offending male bear. At the same time, polar bears are the only bears that actively attack humans, and most of the attacks take place at night.

Question 4: Polar bears absorb ultraviolet rays for winter. How do dogs spend the winter? Polar bears can't absorb ultraviolet rays. Polar bears eat a lot to gain weight (mainly fat) before winter comes. In winter, they hibernate, mainly by consuming body fat to generate energy to maintain normal life activities. Dogs generally don't hibernate.

Question 5: How do polar bears spend the winter? Hello, I suggest searching BBC documentary Frozen Planet. After watching this documentary, you can get the answer you want.

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Question 6: Why do polar bears hibernate? Why don't they starve to death without eating for a long time? Lack of food is the main reason why animals hibernate. If there is enough food, many bears don't hibernate, but hunt all winter. But when there is not much food, bears will hide in caves for the winter. The body temperature of small mammals will drop rapidly during hibernation, but the body temperature of bears will only drop by about 4 degrees, but the heart rate will slow down by 75%. Once the bear begins to hibernate, its energy source changes from diet to fat stored in the body. Tom evans, a field biologist working in the polar bear program of the US Fish and Wildlife Service in Alaska, said that this chemical action has changed dramatically. After fat is burned, metabolism will produce toxins. But when bears hibernate, cells will break down these toxins into harmless substances and recycle them. There is no such mechanism in the human body. If the toxin accumulates, people will die within a week. This biochemical action also allows bears to recover water from their bodies, so they don't urinate during hibernation. Polar bears can use the mechanism of fat burning even if they don't hibernate. This awake hibernation keeps polar bears active all winter without hiding in caves.

Question 7: How do geese, polar bears, seals and foxes spend the winter? From the perspective of ecological balance, if giant polar bears wander around the grassland, it will not only pose a great threat to the survival of a small number of reindeer and musk oxen, but also compete with wolves for food and make them hungry. Perhaps it is the thoughtful and ingenious arrangement of the creator, or perhaps polar bears disdain to associate with wolves. ...

Question 8: How does the white bear spend the winter? White bears hibernate in winter. Both white bears and black bears have the same hibernation habit. Even polar bears. If we have winter here, they hibernate there.