The geese maintain a strict and orderly formation, that is, they are arranged in columns or zigzag. Because it flies all day, it is not enough to rely on the strength of a goose. We must help each other and fly fast and far. Strong geese fly high with their wings, and a gust of wind sends them from bottom to top, gently lifting them up so that the geese who travel long distances will not fall behind.
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It is also a manifestation of gregarious instinct that geese are arranged in neat herringbone or glyph. Because it's good for defense. These geese are always led by an experienced goose and always walk in front of the team.
During the flight, the leading geese are very tired, so they often exchange places with other geese. Young birds and weak birds mostly stand in the middle of the team. When they stop to look for aquatic plants, there is always an experienced old goose to keep watch for them. If geese fly south, they are in danger of being eaten by the enemy.
Every migration of geese takes one to two months, and there will be many difficulties along the way. But if you go to the north in spring and the south in autumn, you will never break your word. No matter where they breed and spend the winter, they will migrate north and south on time.
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Baidu encyclopedia-Dayan