Broadly speaking, birds are an integral part of nature, and all kinds of birds play an irreplaceable role in the harmony and prosperity of nature. For example, some birds can eat insects, which is beneficial to plant growth; Some birds eat carrion, which is beneficial to environmental sanitation; Some birds pollinate flowers, which is beneficial to plant reproduction; Some birds prey on other species to prevent them from over-breeding, which leads to out of control. Wait a minute. In a world without birds, I don't know what catastrophic events will happen.
In a narrow sense, some people like to keep birds. Birds are to him what music is to those who love music, food is to those who love food, and cars are to those who love cars. Of course, keeping birds can't interfere with other people's normal life. On the premise of not disturbing the normal life of others, bird people should get the necessary respect.
Birds: A class of Vertebrates. Body feather, constant temperature, oviparous, amniotic membrane outside the embryo. Forelimbs have wings and sometimes degenerate. Multi-battalion flying life. The heart has two atria and two ventricles. Bones are porous and full of gas. In addition to the lungs, the respiratory organs also have airbags to assist breathing. Birds on the earth are divided into six categories: swimming birds, wading birds, climbing birds, walking birds, raptors and songbirds.
These six categories are collectively called the six ecological groups of birds. 902 1 species has been found all over the world; There are 1 186 species in China.