Does Sixi Bird need a nest?

The four happy birds enter the breeding period to lay their eggs, and they will not be able to breed if they do not have it.This bird's nest is generally in the gaps of the eaves in the gaps of the eaves in the tree holes and wall holes.There are many materials for making nests, such as bitter grass, fine branches, grassroots, etc., there are some pine needles and animal hair.The diameter of the nest is about 13 cm. After the nest is done, it will lay eggs. There are usually 4-6 eggs in a nest.