1. If birds are extinct, it will not only lead to the spread of pests in forests and grasslands, but also the seeds of some plants will not spread, thus affecting the ecological environment of plants.

2. Birds of prey, such as eagles, falcons, eagles and vultures, and rodents that prey on grasslands have a great influence on maintaining the ecological environment of grasslands. If they are extinct, the grassland ecological environment will be destroyed by rodents, and with the reproductive ability of rodents, Hulunbeier grassland will disappear completely and become a Gobi desert before long.

Birds can not only protect the ecology, but also restore it. After the volcano erupted, it was deserted, with thousands of miles of bones and no grass growing, and the ecology was completely destroyed. Only birds can cross Qian Shan and bring hope to life.