Which animals need to hibernate?

Many animals sleep in winter to protect themselves from freezing temperatures. The following is a list of hibernating animals. Once the weather gets cold and winter passes, they will resume their lives.

1, bat

Hibernation duration: hibernate from September to April.

Type: true dormancy

The only flying mammal, the lonely bat, is the longest true hibernator. As we all know, species like the big brown bat sleep for a long time, between 67 and 80 days. During this period, depending on the fat stored in the body, their heart rate dropped from 400 beats per minute to 25 beats per minute. In February and March, some bats leave their hibernation (where bats hibernate) to look for food and water. When spring comes and hibernation ends, most bats will lose about half their weight.

2. hey

Sleep duration:? 165438+ hibernate from October to late March

Type: true dormancy

Hedgehogs are spiny mammals in Europe, Africa, New Zealand and Asia. Usually, hedgehogs keep a constant body temperature of 35 degrees Celsius in summer, but at the beginning of winter, their body temperature will drop to 6 degrees Celsius to cope with the scarcity of food. Hedgehogs enter hibernation for about 2 to 5 months, and males hibernate before females. Before going into hibernation, they will make a leaf, grass and other plants. In hibernation, hedgehogs hardly breathe, but breathe every few minutes. Its body temperature is usually around 35 degrees Celsius, and drops sharply to 10 degrees Celsius ... As the chemical reaction drops to 75%, fat reserves become the only food source. In extreme cases, their heartbeat will generate more heat, which will make them wake up briefly.

3. Bear

Duration of hibernation: Bears hibernate for several days or weeks to six months or more. This difference is due to the change of latitude and temperature.

Hibernation type: true hibernation state

Bears are typical examples of animals that experience hibernation. From swamps and mountains to the cold Arctic, bears are everywhere. Before winter comes, a bear will look for a suitable place in the cold months. Once you find this place, you will eat a lot of food and store it in the form of fat. During the months when it sleeps, the bear uses the stored fat until the end of winter. At the same time, I will not eat, drink, defecate or urinate during this period. Unlike small hibernating animals such as squirrels and groundhogs, the body temperature of bears will drop by 6℃. However, their oxygen supply and metabolism have indeed dropped sharply by nearly 75%.

4.ground squirrel

Hibernation: five to six months in winter or summer (depending on the location)

There are about 62 species of long-lived terrestrial rodents. Among them, non-tropical ground squirrels found in temperate regions of North America, Eurasia and parts of Africa are known hibernating animals. Some famous species include American red squirrel from evergreen forests in North and Central America, Arctic squirrel from tundra and Mojave ground squirrel from Mojave desert in California.

During hibernation, they enter their nests, where they lower their body temperature so that it is only one or two degrees higher than the outside temperature. They were rolled into a ball and their heads were clamped on their legs and skulls. Slow heartbeat and breathing. Once a week, the ground squirrel will wake up for a period of time, about 12-20 hours, and then go into hibernation again.

5. Dormouse

Sleep duration:? 65438+1hibernate from October to April.

Type: true dormancy

These rodents are characterized by bright golden yellow and small size. They sleep in their own nests. During this time, they roll up tight balls and lower their body temperature, breathing and heartbeat.

6. Groundhog

Hibernation period: hibernate from 0 to March or early April.

Type: true dormancy

Groundhog, also known as hog, groundhog, groundhog and grasshopper, is the third largest rodent in North America. It hibernated for half a year. Its temperature is kept at 38 degrees Fahrenheit, and it only breathes once every six minutes.

In addition, some animals, such as hamsters, badgers, skunks and raccoons, do not actually hibernate, but usually become inactive or paralyzed within four to five months. However, in warm winter, these animals may be very active.

2. Reptiles, mollusks and amphibians are different from warm-blooded animals. Reptiles and other warm-blooded animals can't create their own body temperature and need to get it from the environment. This and food shortage are the reasons why they need to go into hibernation.

1, frog

Hibernation period: hibernate from late October of 65438 10 to 65438 10.

Type: true sleep, active

Frogs living in cold climates hibernate in streams in winter, split in logs and live in rocky places. They store glucose in the body so that it will not be frozen. Some frogs even hibernate underwater. Toads are cold-blooded, Nocturnal Animals. Their hibernation period starts from 10, and some toads hibernate for three to four years. They rely on body fat stored in warm months.

2.snails

Sleep duration:? 65438+1hibernate from October to April.

Type: real hibernation, activity

Many kinds of snails hibernate in cold months. They do this by covering their bodies with a thin layer of mucus and storing fat in their bodies. This keeps them hydrated. Then, they bury themselves and harden their skin with mucus, thus sealing their shells. This can prevent predators from hurting them during hibernation. In the case of drought, some snails can also be activated.

3. snakes

Hibernation duration: It depends on the local temperature.

Hibernation type: bruising

Unlike mammals, the hibernation of snakes is called bruising or overwintering. In most cases, the chances of a snake's survival depend on how it avoids frost. That's why they crawl into crevices, holes and stumps to hibernate. At this stage, the snake's metabolism is very slow and it can't digest food. Some species, such as banded snakes, sleep in groups to keep out the cold. These snakes have established a "hibernation" and can accommodate hundreds of snakes at any time.

4. Common box turtle

Hibernation period: 65438+1mid-October to late April.

Hibernation type: bruising

When food becomes scarce in cold months, wild turtles and tortoises hibernate. Digestion slows down and the efficiency of the immune system decreases. Box turtles look dull, eat less and bask in the sun.

3. Insect Directory Insects hibernate in winter differently from mammals. At this stage, they enter a state called diapause. This is related to the long-term suspension of life function. So insects like mantis bear the brunt like eggs, and will only appear when spring comes. If they have to endure winter like adults, many insects will change the chemical composition of blood and produce a mixture similar to antifreeze to prevent them from freezing.

1, butterflies and moths

Sleep duration:? 10 October to March

These insects must undergo behavioral and physiological adaptation to resist the severe winter. At each stage of the moth life cycle, the adaptability is different. Eggs hatch longer, and caterpillars don't produce pupae even if they are hungry. Adult moths will eventually flock. In winter, they sleep in streams or cracks in trees.

2. ladybugs

Sleep duration:? 10 October to March

Hibernation of various ladybugs is quite common. They sleep a lot at home, in bark or leaves. They get together to sleep. This keeps them warm and helps to resist predators during hibernation.

3.bumblebee

Sleep duration:? 10 October to March

Dormant state: a true dormant state

Among bumblebees, only the new queen bee can survive in bad weather. The rest of the colonies, including workers, old queens and men, died. The queen bee drinks a lot of nectar to fill her body fat. This enabled her to spend the cold months. Ideally, the queen bee should weigh about 0.6 grams to hibernate successfully and appear next spring. In the case of extreme temperature drop, the queen bee will produce glycerol. In this way, it plays an anti-freezing role in the body and prevents the formation of ice crystals.

Four. Bird list nightingale

Sleep duration:? 10 October to March

As the only known hibernating bird, Puwell will find a hibernating place under rocks and logs and stay for four to five months. During this period, it will sleep for about 100 days, and its energy level will drop sharply below 93%. In this state, the bird's body temperature drops, its heart beats faster and its breathing frequency decreases.

Another change that some animal species adapt to is that they will go to a warm climate and stay there until the end of winter. Their biological clocks are timed accordingly, and once the climate in their habitat gets warmer, they will migrate back.