How do polar bears survive the winter, and do polar bears hibernate?

Polar bear. In winter, it relies on local hibernation to survive the winter, and it will seek shelter from the wind in the harsh winter to sleep on the ground, breathing rate.

Lower, enter a state of sleep, not sleep, once you encounter an emergency, you can immediately wake up and deal with changes. Also, polar bears just don't eat or drink for a longer period of time, not the entire winter.

In the harsh winter, outdoor activities are greatly reduced, and it is almost possible to go without eating for a long time; At this time, they seek shelter from the wind and lie on the ground to sleep, and their respiratory rate decreases and they enter local hibernation. We should see more polar bears in TV documentaries, and they are the world's largest land carnivores.

Polar bears spend most of their lives in a state of "rest", such as sleeping, lying down, or waiting for their prey, and spend the rest of their time walking or swimming on land or ice, attacking their prey, and spending the rest of their time enjoying food.

Polar bears go out much less in the harsh winter and can go almost without food for long periods of time, at this time they seek shelter from the wind and lie on the ground to sleep, and their respiratory rate decreases and they enter partial hibernation. The so-called partial hibernation, on the one hand, refers to the fact that they are not hibernating, such as snakes and other animals, but rather sleeping, and can wake up immediately in case of emergency. Polar bears simply don't eat or drink for an extended period of time, not the entire winter.

Moreover, scientists have also suggested that polar bears may also have partial hibernation, that is, it is difficult to forage for food during the summer when the ice floes are at least, and may also be in a local summer hibernation state.

Polar bears, carnivorous ursidae, are the largest land carnivores in the world, mainly found in the Arctic, with a small head, small, round ears, a slender neck, broad feet, and hairy limbs. It mainly preys on seals, especially ringed seals, but also hunts bearded seals, saddle seals, and hooded seals, and is known as the "king of the Arctic Ocean".

Known as the "King of the Arctic Ocean", polar bears are snoozes, they hibernate like other ectotherms, but polar bears do not sleep with their heads in their arms when they hibernate, but with one eye open and one eye closed, maintaining a high degree of vigilance, as long as there is a slight disturbance, they immediately wake up and are ready to attack at any time. Polar bears are dressed in hardy winter coats, and their coat is like silver and snow. It has a layer of fat five to seven centimeters thick under its skin and can live even in the harsh winter season of -70.

The Arctic has six months of extremely cold winter, wind mixed with blizzards, often into the polar night of more than ten days, at this time can hunt less food, but like other bears, polar bears hibernate only sleep, not often do not wake up, female polar bears will mostly give birth to bears in burrows. But there's a problem with this text, polar bears are not ectotherms.

To hibernate. Unlike their grizzly bears, which are their close ancestor, polar bears hibernate only when they are pregnant. Since winter is an important season for seal hunting, male and female bears do not hibernate.

After the male bears pursue the female, they stay together for several weeks, but when they do, they will split up to feed and may never see each other again. If the mother bear can catch enough seals and store enough fat before winter, she will go to a specific location during the winter (about the end of October to early December) and start digging up snow to create her own feeding burrow and prepare to give birth to her cubs.

Some scientists have found that at the right opportunity, female bears will also use the existing nursery burrows that other female bears have abandoned in the past, so as to reduce the strength of burrowing and store their own energy to feed the bears.