What is the order in which dragonfly compound eyes are described?

He has three pairs of compound eyes with more than 28,000 small eyes, his vision is very good, and he can also look up and down and backward without having to turn his head, and his compound eyes can also measure velocity, and when an object moves in front of the compound eye, it can be processed to determine the speed of the target substance.

There are a total of 20,000 to 28,000 small eyes in the dragonfly compound eyes, and the structure is very special. The small eye in the upper part of the compound eye is dedicated to seeing distant objects, and the small eye in the lower half is dedicated to seeing near objects. Most of the eyes of insects are short-sighted, but the eyes of dragonflies can see from far and near, not only can they see objects up to 6 meters away, but they can also measure their speed.

There are a total of 20,000 to 28,000 small eyes in the dragonfly compound eyes, and the structure is very special. The small eye in the upper part of the compound eye is dedicated to seeing distant objects, and the small eye in the lower half is dedicated to seeing near objects. Most of the eyes of insects are short-sighted, but the eyes of dragonflies can see from far and near, not only can they see objects up to 6 meters away, but they can also measure their speed.

When an object moves in front of the compound eye, each eye reacts like a small camera, processes it to form an image, and determines the speed of the target object based on the image and time that appears in the eye continuously, so that other insects can be captured. In addition, there are three single eyes on the dragonfly's head, which is the task of the division to sense the light and shade. The compound eye and the monocular are in a mutually coordinated and complementary relationship.

If mine is helpful to you, thank you!

Dragonflies have compound eyes because they need to see their surroundings so that they can catch their prey. Its compound eyes are composed of many small eyes, each of which can only see a part of the object, and many small eyes can be combined to see the object clearly. The human eye needs seconds to see the outline of an object, while it only needs seconds to see clearly, so that it can catch moving prey.

The dragonfly's two large compound eyes are also incomparable among insects. There are a total of 20,000 compound eyes, and even about 28,000 small eyes, which are 10 times the compound eyes of ordinary insects. The structure of its eyes is also very peculiar, with a small eye in the upper part of the compound eye, which is dedicated to seeing distant objects; The lower part of the eye is dedicated to looking close.

The reflected light emitted by the object enters the dragonfly's compound eye.

The compound eye of the dragonfly is composed of some small eyes, less than five or six, more than tens of thousands, the reflected light emitted by the object enters the compound eye of the dragonfly, and the light source information enters the visual center to form a light point image, which is the last image that the dragonfly sees.

Appearance characteristics of dragonflies:

1. Dragonfly wings are well developed, the front and rear wings are equal and narrow, membranous, the reticulated wing veins are extremely clear, and the flight ability is very strong, up to 10 meters per second, which can suddenly turn around, and can go straight into the sky, and sometimes can fly backwards. When resting, spread your wings flat on your sides or stand upright on your back. The forewings and hindwings are not similar, and the hindwings are often larger than the forewings.

The anterior edge of the wing, near the apex of the wing, each has a wing nevus, which is rectangular or square, which maintains the regularity of the wing vibration and prevents injury due to tremor.

2. The chest is oblique, the front chest is small, and it can move. The foot is close to the head (to facilitate predation). The abdomen is elongated. Although the structure of the adults is quite uniform, the size varies greatly, and the wingspan is generally 5 cm. From the smallest centimeter to the largest centimeter.

3. Dragonfly has a slender, flat or cylindrical abdomen, with an anal appendage at the end. The feet are thin and weak, with hooked spines that catch pests while flying through the air. The male mating apparatus is located on the abdomen.

On the second and third sections of the web. Male and female copulation also takes place in the air. Most females place their eggs in the water several times when they fly quickly on the surface of the water, and some insert their abdomen into shallow water to lay their eggs at the bottom. <>

Dragonflies have two large compound eyes, and there are 20,000 or even 28,000 single eyes in the compound eyes;

Dragonflies are the insects with the most eyes in the world. Dragonflies have large, bulging eyes that take up the majority of their heads, they have excellent eyesight, and they can look up, down, forward, and backward without having to turn their heads.

In addition, their compound eyes can measure speed. When the object moves with the liquid in front of the compound eye, each "small eye" reacts in turn, and the speed of the target object can be determined after processing. This makes them masters of insect catchers in the insect world.

Its chewing mouthparts are well-developed and powerful.

The dragonfly wings are well developed, the front and rear wings are equal and narrow, membranous, the buried reticulate wing veins are extremely clear, and the flight ability is very strong, up to 10 meters per second, which can turn suddenly and go straight into the sky.