What is it like for bears to hibernate

The hibernation period of bears is from October to April of the following year

Lack of food is a major cause of hibernation in animals, and if food is sufficient, many bears do not hibernate and instead hunt all winter. But when there is not much food, the bear hides in the burrow for the winter. Small mammals have a rapid drop in body temperature when they hibernat, but bears only have a body temperature of about 4 degrees, which slows their heart rate by 75%.

Once a bear begins to hibernate, its energy** is converted from diet to stored fat in the body. Tom Evans, a field biologist in Alaska who works for the U.S. Fish and Wildlife Service's polar bear program, said the chemical changes were dramatic. When fat is burned, the metabolism produces toxins.

But when bears hibernate in hibernation, the cells break down these toxins into harmless substances and recycle them. This biochemical action also allows bears to ** water in their bodies so they don't urinate during hibernation, and polar bears can also take advantage of fat burning mechanisms. This waking hibernation allows polar bears to remain active throughout the winter without hiding in their holes.

The first is the hibernation of amphibians and reptiles such as snakes and frogs, whose body temperature is in harmony with the surrounding environment, and if the ambient temperature drops, the body temperature will drop and enter a state of hibernation, which cannot be adjusted.

The second type is squirrels and other animals whose body temperature is usually kept at a constant temperature, and when hibernating, their body temperature can be lowered to a temperature close to the surrounding environment, but in order to avoid freezing of body fluids below 0, their body temperature is maintained between 5.

The third type is bears, whose body temperature only drops by a few degrees when hibernating, but can sleep without eating for a long time, and should be close to sleep and hibernation under strict classification. Its degree of hibernation is not deep, and it is also called false hibernation.

What does a bear hibernate look like? Uncle cave exploration, dare to ask if he is still alive now?

Bears are hibernates, so they need to hibernate.

There are three main types of hibernation burrowing holes in black bears, the first is the nest on the ground (hereinafter referred to as the crypt), this kind of hole is easy to find, but the protection function is very poor, and the tiger can go out freely. Brown bears mainly have this type of hibernation hole.

The second type is the tree hole, which is usually only accessible to black bears due to their poor tree-climbing skills, so it has the best protection. But if the hole is at the root of the tree, the tiger can also enter it.

The third type is the cave, in which black bears that hibernate in caves are also vulnerable to tiger catch, according to Kramtsov and Chivochenko (1981). The protective effect of the cave depends on the size of the entrance and the presence of a narrow inner chamber inside. If the entrance is small enough, the tiger can't get in.