What are the characteristics of dragonflies? What are the effects of dragonflies on humans?

Dragonflies are masters of catching insects in the insect world. Their chewing mouthparts are well-developed and powerful, making them good friends in production and life. Not only that, humans have also successfully developed and added balancing weights to the wings of airplanes based on the scientific basis of dragonflies, solving the problem of airplane flight. Do you think the little dragonfly has a big role to play?

Contents of this article

1. What are the characteristics of dragonflies?

2. The role of dragonflies in humans

3. The symbolic meaning of dragonflies

What are the characteristics of a dragonfly?

1. Dragonflies are the insects with the most eyes in the world. Dragonflies have large, bulging eyes that occupy most of their heads. They have three simple eyes and compound eyes that are made up of more than 28,000 small eyes. They have excellent vision and can look up, down, forward, and backward without turning their heads.

2. The dragonfly's compound eyes can also measure speed. When an object moves in front of the compound eyes, each "small eye" reacts in turn, and after processing, the speed of the target object can be determined. This makes them insect catchers. Their chewing mouthparts are well-developed and powerful.

3. The dragonfly has well-developed wings, with front and rear wings of equal length and narrow, membranous, and with extremely clear reticular wing veins. It has a strong flying ability, reaching 10 meters per second. It can suddenly turn around, soar into the sky, and sometimes even fly backwards.

The role of dragonflies in human beings

Medicinal value: nourishes the kidney and replenishes essence, clears away heat and detoxifies, relieves cough and asthma. It is mainly used to treat impotence, spermatorrhea, sore throat, cough and shortness of breath, whooping cough, etc.

Dragonflies and airplanes: Scientists have successfully developed helicopters based on the structure of dragonflies. When flying at high speeds, airplanes often vibrate violently, and sometimes even break wings, causing plane crashes. Dragonflies rely on weighted wings to stay safe at high speeds, so people imitated dragonflies and added balancing weights to the wings of airplanes, solving the thorny problem of vibration caused by high-speed flight.

Dragonfly and compound eye camera: People imitate the structure and functional characteristics of the compound eye optical system of dragonflies and other animals, and use many small lenses with specific properties, arrange them regularly and closely, and glue them together to make compound eye lenses. The compound eye camera made of it can take 1,329 identical photos at a time, and can be used to mass-copy integrated circuits of electronic computers. It can also be used in military satellite reconnaissance, which is very useful.

The symbolism of the dragonfly

The symbolism of the dragonfly:

1. The dragonfly is given the symbolic meaning of spring boudoir and autumn resentment, largely because of the dragonfly and jade hairpin. The dragonfly and jade hairpin frequently appear in palace resentment poems, and the resentment has been fixed. Therefore, the dragonfly is also included in the category of palace resentment poems.

2. Dragonflies never represent a fixed emotion in poetry. They are completely subject to the poet's mood. Whether they are happy or sad, they are all determined by the poet's thoughts. In the eyes of poets such as Du Fu, Chen Zi'ang, and Pi Rixiu, dragonflies represent the image of leisurely and pleasant pastoral life. In the eyes of Yuan Zhen, Du Mu, and Li Shangyin, dragonflies are covered with a layer of sadness and even desolation.