Where do insects hide in winter? What insects are there in winter

In the harsh winter, the trees withered, and the insects that were harmful to the crops and the insects that used to be active were gone. No, it's not that simple. In fact, when winter comes, most insects enter the winter period and stop moving.

Regardless of how many generations an insect can have in a year, when environmental conditions are unfavourable for them, there is a period of stagnation of growth and development, also known as "dormancy", which is often during very hot summers or harsh winters, hence the term "oversummering or wintering".

Remembering the nearby wintering grounds (Li Hu photography)Tsubaki elephant nymphs wintering under fallen leaves (Li Hu photography)Overwintering butterfly pupae (beetle larvae) After a long period of observation and research, entomologists have finally identified some of the mysteries of insect overwintering. The first is the accumulation of nutrients. Insects are busy feeding a large amount before they are about to enter the winter, so that the fat content in the body gradually increases, so as to compensate for the metabolic consumption when there is no food supplement in winter; The second is to reduce the water content in the body, once the living tissue is frozen, the swollen ice crystals will inevitably destroy the cell membrane, causing fatal trauma; The most important thing is that insects can produce a large amount of "antifreeze", which is to lower the freezing point of fluids in the body, thereby improving the ability to resist cold.

Insects can survive the long winter in one or more insect forms of eggs, larvae, pupae or adults, under dead branches and leaves, under stones, in tree bark, in soil crevices, and even in human houses. <>

How did a tiny insect survive the harsh winter without a thick coat of fur or a thick layer of fat? Insects can't come out in the cold winter because they have to find a way to hibernate, which is the survival instinct of insects. Insects hibernate in different forms, such as the adult mole cricket hibernates in the burrow in the late autumn and early winter, the borer and mayfly find a place to spend the winter in the form of larvae, the ground tiger and so on spend the winter in the form of a pupa, and the insect such as the cricket buries its eggs or hides in a place to spend the cold winter.

Regardless of the form of insects that they take to survive the winter, they must be prepared in advance: they must first store enough nutrients in the body to drain the water from the body, and then choose a warm and hidden place. <>

The first step in preparing for wintering is, of course, to eat like crazy, to accumulate nutrients and gradually increase the amount of fat in the body. When it's time to stop eating, the fat content in the body reaches its highest level. At the same time, other tissues in the body are constantly storing proteins and carbohydrates.

The accumulation of these substances compensates for the substances consumed during the metabolic process during the overwintering phase. Secondly, it is to reduce the water in the body. Under normal living conditions, the water content of insects is very high, generally about 70% to 80% of their body weight, which means that most of the weight of the whole body of insects is water.

At this time, insects generally enter the hidden place for winter, but have not yet entered the real wintering state, and during this time, they lose another 1% 4% of their water. <>

The insects that do not hibernate in winter are mainly some migratory insects, such as East Asian locusts, armyworms, rice planthoppers, rice leaf rollers, grassland borers, etc., and the way for these insects to avoid low temperatures in winter is not hibernation but migration.

Long-distance and large-scale migration of insects is a common phenomenon in nature. The purpose of insect migration is to avoid the poor living environment and open up new living space. Due to the change of seasons, most migratory insects have formed a migration pattern from south to north in order to escape the low temperature environment in winter.

East Asia is located in the monsoon belt, and its southerly airflow in spring and summer and northerly airflow in autumn are the airflow conditions for insects to migrate northward and southward from generation to generation and migrate seasonally over long distances. China is located in the typical East Asian monsoon climate zone, which provides favorable conditions for the cross-regional migration of East Asian locusts, armyworms, rice planthoppers, rice leaf rollers, and grassland borer pests.

At the same time, in the face of severe cold, some insects go a long way in resisting the freezing of their bodies. Insects have evolved to reduce their supercooling point as much as possible. The supercooling point of locust eggs is about -26 degrees Celsius; The larvae are usually around -30 degrees Celsius, and some species can reach below -60 degrees Celsius.

Winter is also divided into regions, the winter in the south and the winter in the north are different.

Insects are active, as long as the temperature is right.

If it is more than minus 20 degrees Celsius in the northeast, it will not be active.

Except for the insects of the order Cockroach, which do not overwinter, other insects overwinter in different morphological periods, such as eggs, larvae, nymphs, adults, etc.

Ants, you can still see them in winter, and insects are animals.

Stove horse: Stove horse and cricket look similar, but the body is small and yellow, not as strong, beautiful and aggressive as crickets, and the cry is not loud. Flies:

The overwintering mode of flies is quite complex, and it can overwinter in the pupal state, as well as in the form of fly maggots and adults. Ants: Less than 10 in winter will enter the burrow, where they will eat the food stored in the fall.

However, it does not hibernate, but is no longer active and occasionally appears outside the cave. <

1. Stove horse: Stove horse and cricket look similar, but the body is small and yellow, not as strong, beautiful and aggressive as cricket, and the cry is not loud.

2. Flies: The overwintering method of flies is quite complex, which can overwinter in a pupal state, as well as in the form of fly maggots and adults.

3. Ants: Less than 10 in winter will enter the burrow and will eat the food stored in the autumn in the burrow. However, it does not hibernate, only that it is no longer active and occasionally appears outside the cave bridge.

4. Tsubaki elephant: The adult Tsubaki elephant will overwinter indoors, and the common ones are insectivorous Tsubaki that prey on small insects and are beneficial to agriculture.

5. European black bee: European black bee is mainly distributed in the northwestern part of the Apennine Peninsula in the central Mediterranean. The wintering performance is strong, so the European black bee can be active outdoors in winter.

Insects can't come out to move in the cold winter, they have to find a way to hibernate, which is the survival instinct of insects. Insects hibernate in different forms. A few insects, such as the adults of mole crickets, hibernate in burrows in the ground in late autumn and early winter; Some insects, such as borers, mayflies, etc., use larvae to find a place to spend the winter; ground tigers and others use the formation of pupae to survive the winter; Insects such as crickets can survive the cold winter by burying their eggs or hiding them in one place.

No matter which form of insects they take to survive the winter, they must be prepared in advance, first store enough nutrients in the body, drain the water in the body, and choose a place to keep warm and hide.

Most insects have entered the winter period and are no longer active.

There are many types of insects, and their living habits are complex, and the insect state during the winter is not exactly the same. After more than 200 species of agriculture will be common. Forest insects, which are distinguished by overwintering insect states, are as follows:

43% overwintered with larvae; 29% spent the winter on pupae; 17% of the winters were adults; 11% of the winters were made of eggs.

There are many types of insects, and their living habits are complex, and the insect state during the winter is not exactly the same. After distinguishing more than 200 kinds of common agricultural and forestry insects according to the state of wintering insects, the results are as follows: 43% of them spend the winter with larvae; 29% spent the winter on pupae; 17% of the winters were adults; 11% of the winters were made of eggs.

Most of them are dead, and some can survive the winter. For example, locusts and butterflies can survive the winter.

Eggs hatched.

Some insects hatch their eggs under their bodies.

It is used as winter nutrition for babies. Some insects are eaten by the opposite sex, and most of the insects can't stand the cold and freeze to death, I don't know which clever scholar can give me a detailed example of what kind of insect hibernates?

Generally, it hibernates, and some of the descendants die after giving birth.

What insects forehead? Humans are also animals. Winter also needs rest!

As soon as winter arrives, the mosquito will disappear en masse, and everyone will definitely have questions, have you moved to the south? Or did they die en masse? When winter comes, mosquitoes lay their eggs in the water, and when it gets warmer the next year, you can see them, and these eggs are not only frost-resistant, but they can also diapause on their own.

Hibernation... Either that's dead.

can be found, such as the water bug.

The water fly is a general term for the larvae of the insecta dragonfly. The body color is generally dark brown or dark green, similar in appearance to its adult, and it has no wings. Lurking in the muddy bottom of streams or under the stumps and leaves, it is carnivorous and ferocious, and likes to prey on small aquatic insects and their larvae, large water bugs, and can even prey on small fish and tadpoles.

Depending on the species, the duration of the water fly varies from 2-3 months to 1-3 years for the common species, and 7-8 years for the longest to fully mature, during which it takes about 8-14 peeling cycles before crawling out of the water and becoming an adult dragonfly.

For such a long time, they have to spend the winter in the water.

Therefore, insects can be found in the water in winter.