Where do swallows fly in spring?

In spring, swallows fly from the south to the north.

Swallow is a famous summer migratory bird in China. Every year in early spring, it goes north from South Asian countries (including Thailand, Viet Nam, Malaya Islands and Philippine Islands, and Hainan Island in China). In summer, it is all over the country. After breeding, they move south in groups and overwinter in India, Nanyang Islands and Australia. This migration behavior is mainly due to food problems. Swallows mainly feed on mosquitoes, flies and other insects.