每年秋季,大雁由北向南以V字形长途迁徙。大雁在飞行时,V字形的形状基本不变,但头雁却是经常替换的。头雁对雁群的飞行起着很大的作用,因为它在前开路,身体和展开的双翼一直在冲破阻力,而其他大雁在它的左右两边区域飞行,就等于乘上了一辆已经开动的列车,无需再费太大的力气来克服阻力了。就这样,成群的大雁以V字形飞行,就比一只大雁单独飞行要省力得多,也飞得更远。 Every autumn, geese from north to south to V-shaped long-distance migration. Geese in flight, the basic V-shaped shape, but the head geese are often replaced. The goose plays a large role in the flight of the geese as it opens in the front, the wings of the body and the wings of the deployment are constantly breaking the resistance, and the other geese fly in the areas on either side of the right and left, which means they are multiplied by an already actuated Train, no need to spend too much effort to overcome the resistance. In this way, flocks of geese flying in a V shape, than a geese flying alone to be much more laborious, but also fly farther.