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During the long journey, these geese were well organized. They are usually arranged in herringbone or zigzag. When they fly, they keep making "honk, honk" calls. This cry of geese plays a signal role of caring for each other, calling, taking off and stopping.
The geese keep a strict and neat formation, that is, they are arranged in a "human" shape or a "one" shape. Because they fly all day, it is not enough to rely on the strength of a goose. They must help each other to fly fast and far.
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When flying, geese usually rely on the geese in front, which is very powerful and experienced. Because the head geese flap their wings to drive the airflow, if they fly in a herringbone or zigzag way, the geese behind them will fly easily without taking many breaks.
A low-pressure area will be formed behind the head geese during the flight, and the geese that follow can use this low-pressure area to reduce the air resistance during the flight. It is beneficial to the continuous flight ability of the whole group.
It is also a manifestation of herd instinct that geese are arranged in neat herringbone or zigzag. Because it is conducive to defending against enemy damage. Goose is always "captain" by experienced old geese, flying in front of the team. During the flight, the leading geese are physically exhausted, so they often exchange positions with other geese.
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