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Are woodpeckers, magpies and swallows beneficial birds or harmful birds, and what do they mainly eat?
In daily life we often see all kinds of birds such as woodpeckers, magpies and swallows, and many people cannot figure out whether they are beneficial birds or harmful birds. Beneficial birds and harmful birds are judged from the perspective of human interests: those beneficial to humans are beneficial birds, and those harmful to humans are harmful
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Are sparrows beneficial birds or harmful birds, and is a declining population a good thing or a bad thing?
Whether sparrows are harmful birds or beneficial birds is a question that is very hard to answer. It depends on the angle from which you look at it. But in recent years, the number of sparrows has been declining severely. Is this good or bad? Sparrows are not particularly rare animals, just a common and widespread bird species. Children in the past