Are dragonflies beneficial or pests? Dragonflies are not beneficial insects?

Dragonflies are beneficial insects. Young insects can prey on cockroaches or other small animals in the water. Sometimes, insects of the same species also eat each other.

Both adults and larvae are carnivorous, and eat more pests. Adults can prey on mosquitoes, flies, and some can also prey on butterflies, moths, bees and other pests, which are actually beneficial insects.

Dragonflies are beneficial insects. Dragonflies are beneficial insects, which are carnivorous insects and like to catch mosquitoes and flies.

As well as small butterfly moths and many other agricultural and animal husbandry pests, it is an important insect that is very good for humans.

At the same time, dragonflies can also be used as an insect to detect environmental pollution. Dragonflies like to live in humid environments, generally flying by rivers or ponds, its larvae need to grow in water, adult dragonflies are through a little water, lay eggs into sleep, and then go to catch other aquatic creatures, and wait until they emerge before they will slowly crawl out of the water to mate and lay eggs.

Introduction

Aedes aegypti. is spreading dengue fever.

Dragonflies are the natural enemies of this mosquito and have a strong ability to prey on the Aedes aegypti mosquito. At present, the most effective way to prevent dengue fever is to reduce the number of Aedes aegypti mosquitoes around humans, and controlling the number of dragonflies, and subsequently, the number of Aedes aegypti mosquitoes is an efficient and feasible way to stop the spread of dengue virus.

The dragonfly eats a very large amount of food, a large green dragonfly commonly known as "blue-headed stunned".

It can eat nearly 3,000 mosquitoes in a day. And the water fly.

It is not inferior to its "evolutionary body" at all, and can eat 2,000 children a year. But then it was discovered that water flies could be made into unusually delicious food, so they were on the human menu and became the target of capture, and their numbers were declining sharply, which also led to a rapid decline in the number of dragonflies.

Dragonflies are beneficial insects that prey on a variety of agricultural, forestry and animal husbandry pests such as flies, mosquitoes, leafhoppers, midges and small butterfly moths, and are beneficial insects to humans.

Dragonfly insects are abundant in resources and play an important role in many ways. First of all, as a representative class of aquatic organisms, its larvae can monitor water pollution, and some species contain some active substances that can be used as medicinal materials, and their bodies are rich in protein, amino acids, minerals, etc.

Dragonflies' amazing ability to hunt

We know that due to long-term co-evolution, any carnivore will not have a high success rate of predation, because the prey will become difficult for you to catch depending on your hunting characteristics.

Among mammals, the African spotted hyena may have the highest predation success rate, fighting collectively with a success rate of up to 85%, while those who fight alone have a surprisingly low success rate, which is only about 5% more successful than a tiger.

If you've ever seen the flight of mosquitoes dodging rain strikes on rainy days**, you'll be shocked by their ability to fly, but the strong have their own strong hands, and the typical prey of dragonflies is mosquitoes.

A dragonfly eats 30-100 mosquitoes a day, and they are single-working, catching mosquitoes in flight and eating mosquitoes in flight, and some studies have found that their hunting success rate is as high as 90%-95%. Probably no predator has a higher success rate than them, making them a highly successful species that can be found all over the world.

Of course, it is not a matter of one or two days for dragonflies to eat mosquitoes, but mosquitoes have no way to take them, so they can only deal with predatory pressure in another way, enhance their reproductive ability, and try to make dragonflies unable to eat them all. Dragonflies' success is not only due to their ability to fly, but also to their eyes, and if you look at the head of a dragonfly, you will see that their entire head is almost covered by eyes.

Their compound eyes have 30,000 facets, each of which carries information about the insect's surroundings, giving them near-360-degree vision (only behind them is a blind spot). This eye of a dragonfly is kind of like we're walking into a room with 30,000 surveillance screens, each screen is doing different things, and we certainly can't handle that huge amount of information, but they do.

This is one of the reasons why they successfully chase their prey, as well as avoid colliding with other insects in the air. Speaking of the predatory behavior of dragonflies, we must also mention their larvae, the larvae of dragonflies are flightless and live in water, but they are also a powerful predator.