The relationship between man and bird

In a word, wild birds are natural scenery and domestic birds are human companions.

Specifically, birds, especially beneficial birds, can kill pests, spread pollen and seeds, and ensure the normal operation of ecosystems; Saprophytic birds help remove natural garbage and feces from fertile land; Seagulls, albatrosses, etc. Guide the ship; Woodbirds often see snakes and other warning calls that can help hunters; Some bird songs can help people judge the weather; Some * * * birds remove parasites on the surface of cattle and sheep in the pasture; Some birds can enrich human spiritual life, bring human sensory pleasure, and so on.

The relationship between birds and people is very complicated, which varies from time to time, from place to place and from specific situations. For example, birds that specialize in eliminating agricultural and forestry pests are beneficial birds, but they also eat beneficial insects. And strictly speaking, just knowing how many pests it eats a day is not enough to determine the benefits brought by birds. It is still necessary to find out whether the number of pests in nature is really suppressed by the breeding of these birds. Some birds save energy and kill a lot of pests in spring and summer, but they will spoil crops when sowing in spring and harvesting in autumn, and feed on weed seeds in the field in winter. Therefore, "benefit" and "harm" are relative, and there is no absolute beneficial bird or absolute harmful bird. Despite these complicated problems, after in-depth research by ornithologists, it is agreed that all birds existing today, with a few exceptions, are beneficial or not obvious, and beneficial birds account for the vast majority.