In the past, people liked to divide insects and birds into pests, pests and birds. Do you have a new view on this term in the food chain?

PS。 I'll just say a few general points, you don't have to use them all, just choose what you agree with or what you can accept:

Whether pests are harmful to birds or beneficial to insects and birds is entirely determined by human beings' subjective interests. Animals themselves just follow their instincts and live in this world.

We only have one earth, and every animal, including advanced animals, has only one life.

In the food chain, life doesn't matter whether it's high or low. There is no difference between the death of a white swan and the death of a sparrow.

Every living individual is the product of thousands of years of species evolution. Grasshoppers have always been notorious pests, but I believe that they may not be inherently malicious to human beings.

The essence of life dignity lies in freedom and in living naturally. The role of any organism should be viewed comprehensively. Food chains and food webs can be formed between biological circles, and there is no connection between them. It is impossible to distinguish the advantages and disadvantages according to whether they are beneficial to people.

Example:

1) blindly killing so-called harmful birds leads to losses:

(1) In the 1950s, in order to increase food production, people eliminated the sparrows that ate food, which led to a large number of fruit trees' production reduction-without the predation of sparrows, pests increased greatly.

2) beneficial insects become pests:

In Fiji, a Malaysian parasitic fly can host a moth that destroys coconut trees. This harmful moth was eradicated within 10 years, but at the same time, another harmless Fijian moth disappeared. In New Zealand, an introduced parasitic fly was found to control fruit tree caterpillars. It also feeds on local harmless moths. In Hawaii, three kinds of anti-snail drugs were introduced to deal with the giant African snail, an agricultural pest spreading in the South Pacific. But it was later discovered that one of them preyed on local snails at the same time, so that several species are extinct now. Due to the lack of sufficient scientific research, these cases have never attracted people's attention.

3) pests become beneficial insects:

Speaking of cockroaches, this kind of insects not only "harass" residents, but also carry germs and spread diseases. Killing cockroaches has become one of the most urgent tasks for human beings. However, the Associated Press said on the 3rd that in Texas, a big agricultural state in the United States, flying Asian cockroaches have become human "friends" because they are natural enemies of pests such as cotton bollworm. 1986, Asian cockroaches first appeared in Florida, USA. Since then, they have gradually moved to Georgia, Alabama and the eastern coastal areas of the United States, and moved westward to Texas in 2006. In Rio Grande Canyon, Texas, USA, Asian cockroaches that are not picky eaters become natural enemies of pests such as cotton bollworm. In addition, they eat the eggs of Spodoptera exigua. Helicoverpa armigera is a pest that harms the growth of crops such as cotton, soybean and tomato. Spodoptera exigua is not conducive to the growth of cotton, cabbage and other crops.

(2) Grasshoppers that have jumped in the fields for thousands of years were sent to the net shed by Jinning in Jing Quan Village, Huafeng Town, and thousands of them were raised. In the past three years, he has also become a celebrity in Huafeng Town because of raising grasshoppers. People from Shiliba Village have come to visit his grasshoppers and ask him for breeding techniques. In recent years, grasshoppers have gradually become a popular green food on the table, and the market is very good. Jinning originally took a fancy to the good market prospect and easy breeding of grasshoppers, and now his four shed grasshoppers bring him nearly 30 thousand yuan in income every year. It is understood that the breeding of locusts can last from Grain Rain to the first frost, three times a year. You only need to invest once to buy adults, and you don't need to buy young eggs next year. In this way, grasshopper breeding can be said to be a one-time investment and lifelong benefit of the green industry. Now, his grasshoppers are sold to Tai 'an, Xintai and other places, which is in short supply.