What's wrong with the white waist birds do not reproduce

Before the white waistbirds grow up to 10 months, they have not developed maturity, so it is normal to not reproduce.The breeding period of this bird is very long and can lay eggs from March to October.Birds will first make nests on the trees. The nests are composed of weeds, bamboo leaves, ears of rice.After the nest is built, the female bird will lay eggs. Each nest can produce 3-7 pieces. The eggs are white. It takes 14 days to incubate.