A few eggs in the blue song at a time

Blue songs have 4-7 eggs at a time.This kind of bird can breed 1-2 times a year, and the breeding period is from May to July. The birds will be running in the shrub.Some beast hair and feathers.After the nest is built, it will start laying eggs. After 13-15 days of hatching, the chicks will break out of the shell, but because it is late, it takes 15 days to feed to leave the nest.