When will the white -faced mountain bird breed?

The breeding time of the white -faced mountain bird from March to August.This bird is widely distributed, and it can be seen in north and south of my country. There are certain differences in breeding time in different regions. For example, the south began to reproduce in March and hid in the north from April to May.It breeds 1-2 nests a year, with 6-9 eggs per nest, but sometimes it will produce 15 eggs.Usually one day is produced, and it will only be hatched after all is produced.