When will the four happy birds breed?

The breeding of Sixi Birds has begun in April and only ended in July.There are also from the end of March, and it will not end later to August.This bird usually chooses a tree hole to camp in the wild, and it will lay eggs after building the nest.It can produce 5 eggs at a time. When it is less, it may only produce 3 pieces, and there are 7 times.Its eggs can only be hatched for about two weeks, and the success of the chicks is too late.