There are often many birds flying in the city looking for food, why do you rarely see bird nests in

In our daily lives, the animals we see the most are birds. Birds are good friends of human beings, and now there are often many birds flying in the parks in the city looking for food, but there are few bird nests in the city, why is this? There are several main reasons for this. <>

First, there are dense crowds in cities. With the rapid development of China, the population density of Chinese cities.

It's getting bigger. There are more cars in the city, more factories, more high-rise buildings, carbon dioxide.

emissions have also increased quite a bit. The dense population and human footprints make you love the natural environment.

The birds are moving away, and even if there are occasional birds foraging in the city, they will not stop in the city, they are all scared away by humans. Therefore, there are very few bird's nests in the city. <>

Second, there is a lack of environment and food for birds to live in the city. In the big city, there are many high-rise buildings, the area of the green environment is still relatively small, the city is full of traffic, the lights are red and willow green, and the birds have no place to inhabit themselves. In addition, if a bird appears in the city, it may be caught for money.

Birds are kept in cages as human pets, which is not the life that birds that yearn for freedom want. The food for the birds is very simple, rice is sufficient. However, every independent house and burglar window in the city close the possibility of contact between birds and humans, and bird food ** is a big problem.

After the gunshot, there are no winners". In the process of playing games with nature, human beings are actually harming themselves. Only by living in harmony with nature, protecting and respecting nature can we continue to live under this blue sky.

Human beings cannot blindly take from nature, plunder resources, and destroy the entire ecological chain of nature. If there is a problem in any link of the ecological chain, we must accept the punishment of nature. If we want to have "endless children and grandchildren", our first priority is to protect nature.

In recent years, the greenhouse effect.

The news of species extinction is constantly on our ears, and we should pay more attention to it.

The main reason for this is that the nests of these birds usually appear on the edge of some cities, and do not appear in cities, because the cities are very noisy and not conducive to their settlement.

Because there are many construction cars in the city, the lights are bright, there are few trees, and it is noisy day and night, which is not suitable for birds to build nests to live, so it is rare to see bird nests in cities, and birds live in rural areas or forests.

Because the city is full of high-rise buildings, birds don't build nests on top of buildings, they build nests where there are many trees.