Which animals are good for human beings? And tell me what some examples are good for mankind.

The benefits of birds are considerable. A big tit can prey on more than 200 pests in 1 day. 1 magpie 1 year 15000 Dendrolimus punctatus; 1 Aesculaceae larvae that can eat 180 days; 1 Woodpeckers killed more than 300 stem borers in 1 day; 1 Swallow 1 Can swallow 1 More than ten thousand mosquitoes, flies and other pests in summer; 1 owls can prey on more than 1 000 mice in1year, which is equivalent to saving 1000 kg of grain; 1 native swallows can kill 16000 locusts every month during the brooding period. Birds are so beneficial to human beings, shouldn't we regard them as friends?

Bird language, like music, as a kind of information, can adjust the function of people's nervous system, relax people's nervousness, and thus make people feel relaxed. Some bird songs also have the function of preventing diseases and keeping fit. Therefore, concentrating on listening to birdsong can make the tired brain rest, eliminate physical fatigue, forget mental pain, increase mental happiness and form a cheerful personality. Gazing at the bird's every move can also concentrate people's attention and make people's spirit orderly, which is not only conducive to preventing teenagers' myopia and improving their eyesight, but also helps to cultivate teenagers' habit of seeking peace while moving, so that they can concentrate on their work and directly play an auxiliary role in the treatment of various diseases.

Birds are more conducive to human production and life. A pair of woodpeckers can protect more than 10 mu of forest from pests. A cuckoo can kill more than 100 Dendrolimus punctatus every day. A swallow can prey on more than 654.38+00000 flies, mosquitoes and aphids in a summer. An owl can eat 4 ~ 5 mice in one night, and its ability of catching mice is no less than that of domestic cats, thus reducing food loss 1000 kilograms every year. More than 60% of the food of magpies and crows are also pests. Entomologists dissected 500 birds and found that 93% of them had insects and insect fragments in their stomachs. The primeval forest of Changbai Mountain in China is still intact, and no corner is eaten by insects or submerged by diseases and insect pests. It is the credit of "forest guards" such as woodpecker, tea-bellied bird, woodfinch, Sambo bird, northern red-tailed thrush, Huang Peng, thrush, songbird and cuckoo. Birds are human companions. If there are no birds around us, there will be rampant spread of pests and mice. The destruction of ecological balance will lead to the reduction of agricultural production and the spread of diseases, which will directly affect human production and life. Many birds can also accurately predict the weather and become small weather stations for free. On a sunny morning, sparrows are jumping and chirping happily, which indicates that the weather will continue to be fine. At sunrise or dusk in summer, owls crow in a low voice, which indicates that it will rain. Turtledove sticks out its neck and makes a hoarse cry, indicating rainy days ... Many old farmers still use this experience to arrange farm activities, so don't worry.