Wild geese fly in the air, how to distinguish between north and south?

First of all, they can judge the north and south according to the seasons. Generally speaking, geese fly to the south in autumn. There are many changes in autumn, such as temperature, farmland and environment. According to these conditions, the goose can tell the direction. Secondly, geese can also be distinguished according to the direction of the sun. We all know that the sun rises in the east and sets in the west, which is unchangeable.