Swallows are divided into Swift, Louyan, Domestic Swallow and Swallow. In China, swallows began to move northward in February and flew to Guangdong; Arrived in Fujian in early March, and found Zhejiang and the lower reaches of the Yangtze River in the middle; In early April, even before the end of March, you can see it in the Yellow River Basin. Its migration route is to fly northward along the coast and inland along the river, almost all over northern China, even the Mongols, as well as northeast China and southeast Siberia. In addition, when the swallows moved northward, they first went to Taiwan Province Province, then crossed the Taiwan Province Strait to Fujian, or reached Japan eastward along the Ryukyu Islands, and even flew over the East China Sea via North Korea, and moved to northeast China, Inner Mongolia, Siberia and other places. Flying over the mountains in the middle often faces the danger of being hunted by natural enemies such as falcons and eagles.
Swallows feed on insects, and there are no flying insects for swallows to prey on in winter in the north. Swallows can't dig out the larvae, pupae and eggs of hidden insects like woodpeckers and woodpeckers. The lack of food makes swallows migrate from north to south every year in order to obtain a broader living space.
Domestic swallows have a kind of "strange ringworm": they always move in the dead of night and the bright moon is in the sky, and they fly very fast. Sometimes I can only see my own shadow flash by, but I can't see it clearly. Swallows also have amazing memories. No matter how far you fly, you can return to your hometown with amazing memories even though you are separated by thousands of waters in Qian Shan.