The reason why Big Brother does not hatch eggs

Most of the natal does not hatch eggs because of poor maternal nature, or eggs are not fertilized.The breeding period of this bird is from April to August. After the pairing is completed, the nest will start. Most of the nests are built in the tree hole, and the grass will be covered in it.After the nest is built, the female birds begin to lay their eggs. Each nest will produce 3-6 pieces. The color of the egg is blue-green and the surface is shiny.Its incubation period is 16 days. After the chick came out of the shell, it can leave the nest after two weeks of feeding.