What season are migratory birds flying south?

Many birds have the characteristics of seasonal migration along latitude. In summer, these birds breed in temperate regions with higher latitudes, and in winter, they spend the winter in tropical regions with lower latitudes. So what season is it when migratory birds fly south?

1. geese fly south in the Millennium of 24 solar terms, starting from September 7 to 9 every year. "Cold dew geese fly south, chrysanthemums bloom", "August geese bloom, with frost under their feet", and geese fly south from egrets to cold dew.

2. There are two main flight modes. All the way through the Yellow River and Yangtze River basins in the northeast of China, to the coastal areas of Fujian and Guangdong, and even to the Nanyang Islands. The other way passes through Inner Mongolia and Qinghai, reaches Sichuan and Yunnan, and even reaches Myanmar and India for the winter. The next year, he flew back to Siberia to lay eggs and reproduce.

The geese fly to the south for the winter. The south has a tropical climate, which is warmer than the north, and the food will be richer than the north. Wild geese belong to migratory birds and fly to the south for winter. Migratory birds are generally migratory birds that regularly travel back and forth between wintering grounds and breeding grounds with seasonal changes. They have a large population, come and go at regular time and place, and have fixed wintering, breeding and migration sites.

What season are migratory birds flying south?