动物,如鱼类、鸟类、昆虫的集体统一行动有时是非常可怕的行为,最典型和最可怕的莫过于蝗虫的集体统一行动。一只两只、几十只蝗虫对人类和庄稼、植物构成不了威胁,一万只甚至一亿只蝗虫也可能对庄稼和植物不会造成太大破坏,前提是它们不同时啃食植物和庄稼。但是只要有上万只蝗虫步调一 Collective reunification of animals, such as fishes, birds and insects, is sometimes terrible behavior. The most typical and most horrible thing is collective action by locusts. One, two or dozens of locusts pose no threat to humans and to crops and plants. Ten thousand or even 100 million locusts may not cause much damage to crops and plants if they do not eat plants and crops at the same time . But as long as tens of thousands of locusts step one