How to keep warm in winter

Belled birds need to feed enough oil in winter. This can protect the cold and keep warm. Drinking water should not be too cold.It is a kind of grassland representing birds, usually flying while flying, and because it is very high, it can only hear the sound, but it cannot see its position.This bird's requirements for food are not high. They mainly eat small grass buds and insects, and they will not destroy crops. They belong to agricultural birds.