Swallows usually feed on mosquitoes, flies and other insects. They have always been used to preying on flying insects in the air, but they are not good at searching for insect food in cracks in trees and on the ground. They are well-known beneficial birds.

1, Wild Swallow: Like to eat mosquitoes, flies, locusts, butterflies, moths, earthworms, caterpillars, grasshoppers and so on.

2. Artificial feeding: you can occasionally feed vegetable leaves or other grains, such as rice and wheat.

Almost all kinds of suborders only eat invertebrates in the air, mainly insects. Plant food only exists in a few kinds of food, and the intake is very small. Only the two-color tree swallows regularly ingest plant substances (mainly berries), and this only happens during the insect shortage period.

The food of migratory birds in winter is usually different from that in the breeding ground. If Ru Yan overwinters in Africa, the proportion of ants in food will increase. In addition, a species' preference for foraging in winter and breeding areas will be different. These changes are considered to be the result of competition between these migratory birds and resident species in winter habitats.