Why do so many red dragonflies appear after rain? Where did it come from?

Because the environment after the rain provides convenience for the red dragonfly to lay eggs and prey. The sight of a lot of red dragonflies indicates that the local climate is suitable, as dragonflies generally live near ponds and prefer watery, humid and warm places.

Dragonfly water is actually the action of dragonfly egg-laying, because dragonfly lays eggs in water, after rain, it provides a good breeding environment for dragonflies, and at the same time, dragonflies specialize in preying on flies, mosquitoes, small moths, rice planthoppers and other insects. Because mosquito larvae, the babies, also live in water, dragonflies can solve their larval feeding problems by laying their eggs in the water.

Before and after the rain, the air humidity is high, and the wings of flies, mosquitoes and other small insects are stained with moisture, which increases their weight and cannot fly high. In order to catch these small insects, dragonflies will appear en masse and fly low to feed.

Summer is the breeding season for dragonflies. Because dragonflies lay their eggs in water, after rain, it provides a good breeding environment for dragonflies.

They're all about home. The dragonfly held on to the smaller branches with its six legs, and when the sun came out, there was no dew on its wings, and it flew away again.

It is only available in summer, and it is the breeding season. When it rains, I hide because I am afraid that my wings will get wet, and when it rains, I come out again, so I usually hide in plants.

Dragonflies point to water, good spawning environment.

Come from a place where water and grass are abundant.

Find a leaf and hide.

The flocks of dragonflies are hunting before the rain, just like the swallows that fly low before the rain. Dragonflies tend to be found in places with water, such as ponds, because their eggs are laid in the water. That is, "dragonflies point to water".

Dragonfly larvae have to go through more than 11 molts, and it takes 2 or more years to crawl out of the water along aquatic weeds, and then finally molt and emerge into adults. However, adults only live for 1 to 8 months, and it is usually common for dragonflies to breed in summer.

Because the air before the rain is humid and the moisture increases, the dragonfly's thin wings are not able to fly high due to the influence of the moisture in the air; At this time, the small flying insects also fly at low altitudes, and the dragonflies will also focus on feeding.

The surface of the dragonfly's wings is a waterproof membranous substance that will not be soaked by rain. I'm busy hunting, so when it rains, I hide in the grass. Have you ever seen a flock of dragonflies flying around when it rains? It's all after the rain or before the rain.

It is only available in summer, and it is the breeding season, so when it rains, I hide for fear that my wings will get wet. When it comes out again after the rain, it's usually a matter of hiding in the plants.

When it rains, butterflies and dragonflies choose the nearest flowers and leaves and put their wings close to the back of the leaves. Butterflies often choose places with relatively dense density, such as grass and wheat fields, because their leaves are denser and have the effect of keeping out the cold; There are also places where tall poles or leafy plants can shelter from the wind and rain; They will also hide in mushrooms, eaves, and other places where they can block the rain.

Dragonfly:

Dragonfly is a generic name for invertebrates, insects, dragonflies, and suborder Paraptera. The base of the hindwings is slightly larger than the base of the forewings, and the wing veins are slightly different. When resting, the wings lie flat on the sides.

The larvae are short and thick, with rectal gills and no caudal gills. There are 3 general departments, including Aeshnidea, Cordulegastroidea, and Libelluloidea, with a total of 11 families. Flyflies and dragonflies are the most common and are widely distributed throughout China.

..Sometimes it's in people's houses, or in school classrooms, and some eaves, and if it's in some woods, dragonflies are usually under the leaves, or in very hidden places, but the common thing is that they can shelter from the rain.

Sometimes it's in people's houses, or in school classrooms, and some eaves, and if it's in some woods, dragonflies are usually under the leaves, or in very hidden places, but the common thing is that they can shelter from the rain.

When it rains, dragonflies usually hide in the grass, in the garden and in the wheat field.

Dragonflies usually take shelter from the rain under the leaves when they take shelter from the rain.

It should be in a place where you can shelter from the rain, where some dragonflies are, and they will come out again after the rain.

On the water, don't get me wrong, Zhou's.

When it rains, dragonflies will choose the nearest flowers, leaves, and stick their wings to the back of the leaves.

Dragonflies often choose places with relatively dense density, such as grass and wheat fields, because their leaves are denser and have the effect of keeping out the cold; There are also places where tall poles or leafy plants can shelter from the wind and rain; They will also hide in mushrooms, eaves, and other places where they can block the rain.

It's hiding in the classrooms of the school, and we've seen it in the classrooms of our school, right? If it were somewhere else, it would have been possible to hide somewhere in the woods, such as a hidden place.

Question 1: How do dragonflies tell if it's going to rain based on air humidity and air pressure. Before the rain, the humidity of the air will be very high, and the air pressure will also decrease, and this is when dragonflies will be able to distinguish it. will fly very low.

Question 2: How does the dragonfly predict rain The wings of the dragonfly are very special, they can feel the change of air pressure, before the rain, the atmospheric pressure will change, and the general atmospheric pressure increases, and the dragonfly is about to rain.

Question 3: Is dragonfly a symbol of rain Before it rains, the air humidity is very high, and the wings of flying insects in the air will be wet, so they can't fly high.

Question 4: Why does it mean that the dragonfly flies very low and it is going to rain? Odonata The members of this order are mostly large and medium-sized insects, with large heads and flexible rotation, two pairs of wings with transparent membranaceous membranes, many transverse veins on the wings, and often wing nevi on the front edge of the wings near the apex of the wings.

It is distributed all over the world, especially in the tropics. About 5,000 species are known, and about 350 species and subspecies have been recorded in China. Many dragonflies do not have ovipositors.

They hover above ponds or fly back and forth along streams, scattering their eggs into the water as they fly; Some species fly close to the surface of the water and lay their eggs in the water by "spotting" them with their tails. Adults catch insects of the right size during flight and feed on them.

Dragonflies mostly fly over open areas. Insects of the Fly family often come out at dusk to hunt mosquitoes, small moths, leafhoppers, etc., and are important beneficial insects. When the weather turns bad, insects mostly fly on the ground, which can only indicate that the air pressure is low, and sometimes it does not rain.

Question 5: Why do dragonflies fly at low altitude on rainy days Before rain, the air is full of small water droplets, and many small flying insects (referring to the very small kind, which is difficult to catch with the naked eye) are covered with small water droplets on their wings, so it is difficult to fly high, and dragonflies take the opportunity to fly low to catch small flying insects for food, so dragonflies flying low also indicates that it is about to rain or the air is very humid.

Question 6: Why do two dragonflies get together when it rains Dragonflies breed eggs and hatch larvae in the water, and dragonflies usually mate, but they are all on the surface of the water.

When it rains, two dragonflies mate together, so that the larvae have a much better chance of survival, which is also the long-term survival habit of the species.

Question 7: I also know that dragonflies will fly low before it rains.

Question 8: Why do dragonflies fly low when they are ready to rain When it is about to rain, the humidity of the air is high, so that the wings of the insects that the dragonflies want to hunt are stained with water, and the insects cannot fly high because of the water on their wings, and the dragonflies also take the opportunity to hunt. So when it rains, dragonflies should fly low. Hope it helps.

Question 9: Why does it rain when there are too many dragonflies? It's not that there are more dragonflies and it will rain, but because the air storage before the rain is humid and the water increases, and the dragonfly's thin wings make it not fly high due to the influence of water in the air; At this time, the small flying insects also fly at low altitudes, and the dragonflies will also focus on feeding.

This is mainly because the number of dragonflies is becoming less and less, and our urbanization activities are becoming more and more obvious.

In the modern world, we will find that not only the number of dragonflies on the roadside has decreased, but even the number of many insects and wild animals has decreased. This is a very regrettable phenomenon, especially when our lives are getting better and better, we will find that human activities will seriously affect the normal activities of organisms in nature, and may even lead to the direct extinction of a species. It is for this reason that we need to pay more attention to environmental protection, and at the same time, we need to seek harmony between man and nature.

The number of dragonflies in modern society is decreasing.

This phenomenon is actually very common, especially in the vicinity of first-tier and second-tier cities, and we can find that the number of dragonflies is becoming less and less, and the opportunity for people's mood is basically in the countryside. Because the life in the city itself is relatively crowded, and at the same time, there are no realistic conditions that can meet the survival of dragonflies, because dragonflies basically do not appear in the city, and the friends in the city basically do not see dragonflies. <>

This problem is related to people's urbanization activities.

When people's urbanization activities become more and more intense, the number of many organisms in nature is decreasing, and many organisms will gradually become extinct as a result. I think it's a very unfortunate thing because we don't have to protect all species, but we also need to further ensure the richness of species in nature. Especially for all kinds of dragonflies, the dragonflies themselves are a barometer of rainy and sunny days, and many people will also miss the time when they were children watching dragonflies before it rained.

Finally, dragonflies are a very ancient species, having appeared on Earth as early as 300 million years ago. To some extent, dragonflies existed about 100 million years earlier than dinosaurs, and the length of early dragonflies could even reach about 70 centimeters. After a series of evolutions, dragonflies have gradually withdrawn from the historical stage of nature.

Dragonflies are rarely seen on rainy days now, and in my personal opinion, there are two ways to do so. First, people live in the countryside less time and spend more time in the city, and dragonflies don't like to be noisy in the city, so the chance of seeing dragonflies is greatly reduced; Second, human production and life have brought trouble to the life of dragonflies, making it difficult for dragonflies to reproduce, and the number has been greatly reduced.

When I was a child, I lived in the countryside, and in the summer evening, I was impressed by the dense dragonflies flying in the sky. At that time, there were not too many vehicles on the asphalt road, and dragonflies flew intensively, and they were often hit and killed by vehicles, and dragonflies were often seen on the asphalt roadside. As time went by, I also entered the city life, and when I saw that the dragonfly had less and less time, I also felt that the dragonfly was becoming more and more precious.

This happens for two reasons.

The habitat of dragonflies has high requirements for the environment, not only need to clean freshwater rivers and lakes, but also need to have abundant mayfly organisms. Human activities have destroyed the natural environment and led to a significant reduction in dragonfly habitat. In this case, the reproduction of dragonflies has also been affected.

Living in the city, it is even more difficult for us to see dragonflies, let alone fly in groups. The decline in the number of dragonflies, as well as the pollution of the environment by human activities, have greatly reduced the probability of seeing dragonflies.

In addition to polluting the environment, human-caused effects have also created a large number of items that interfere with the survival of dragonflies, such as glass windows, roads, and cars. Dragonflies like to live in humid environments, and if they want to find a suitable water source, they need the help of sunlight to shine on the surface of the water and reflect horizontally polarized light.

With this perception, dragonflies are able to find water sources, lay eggs, reproduce, and live in them. Humans can also produce polarized light when they make asphalt roads, glass, and other objects, but the fatal part is that these objects emit polarized light stronger than water, thus misleading dragonflies, making it difficult for them to find a source of water for spawning, and affecting their reproduction.

In addition to these two reasons, there are also people who like to eat dragonfly larvae, and people's greed is dragonfly disaster. The existence of such a reason will also cause the number of dragonflies to drop significantly, making it difficult for people to see dragonflies.

Habitat loss and pollution have certainly led to a decline in dragonfly populations, and the polarization of natural water bodies is very low. The most important ones are climate change, atmospheric pollution, and the abuse of pesticides.

At that time, according to the old man, it was because it was about to rain, and because the humidity in the air was relatively large, dragonflies could not fly, but dragonflies are rare now, is this really a sign of mass extinction?Of course, in retrospect, not only are there fewer dragonflies, but also fireflies and bees are hard to see. Numbers are declining all over the world...

Habitat loss and pollution are certainly responsible for the decline in dragonfly populations.

Because of the exploitation of nature by humans, the living environment of dragonflies is constantly compressed, so dragonflies are rarely seen on rainy days now.

This is because the air pressure is low before the rain, insects tend to float at low altitudes, and dragonflies tend to flock in groups in order to feed.

The version of the flight at two or three meters above the ground is a sign of impending wind and rain.

Dragonflies will fly very low before rain because their wings are leaf-shaped, unlike feathered animals that can withstand large air pressure. When it rains or when it's cloudy, the climate is humid and the air is very humid, and the composition of dragonfly wings is keratinized proteins.

When dragonflies fly, when they encounter humid moisture, they tend to wet their wings, and the dragonflies cannot fly high due to their weight. Therefore, as soon as experienced farmers see a whole group of dragonflies flying low, they know that it is going to rain, and make early arrangements for their agricultural production to prevent the loss of crops caused by rain.