First, sparrows

mainly feed on grains. When the grain is ripe, they will fly to the farmland in large groups to eat the grain. During the breeding period, some insects are eaten, and chicks are raised by insects.

2. Crows

are omnivorous, eating grains, berries, insects, carrion and eggs of other birds. Many species like carrion, which is harmful to seedlings and grains. However, during the breeding period, it mainly feeds on small vertebrates, locusts, crickets, scarabs and moth larvae, which is beneficial to farmers. In addition, because they like to rot and peck at agricultural garbage, they can eliminate the pollution of animal carcasses and play a role in purifying the environment.

Third, orioles

Most of them are resident birds, and a few species migrate, so they don't flock together when migrating. Arboreal, flying through branches to feed on insects, berries, etc., rarely moving to the ground. The oriole is a famous insect-eating bird.

4. Woodpeckers

In addition to killing pests under bark, such as longicorn larvae, their wood-cutting traces can be used as indicators of forest health logging. They feed on insects such as longicorn beetles, brown beetles, winged moths and stinkbug worms, and can eat about 1,5 of them every day.

5. Quails

mainly eat weed seeds, beans, grains and berries, tender leaves and buds, etc. In summer, they eat a lot of insects and larvae, and small invertebrates.

Baidu encyclopedia-sparrow

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Baidu encyclopedia-quail.