How long does it take to be born by waxing birds to fly?

The waxing bird is about 14-15 days when it is born.It is usually reproduced in May and June of each year. The birds will be built on the branches. The shape is deep cup -shaped, and the inner wall is smooth. It is usually composed of hair, tender branches, and roots.It can produce 3-4 eggs without noise, the color is blue, with spots on it.It takes about 15 days to hatch for chicks to take off. If artificial breeding, it can be taken out in 10 days.