How long will my brother born until flying?

Brother Ji is about 26 days when he was born.The breeding period of this bird is from April to June, and the nest is usually built on the trees, and there are some dry grass, feathers and snakeskin.Usually it can produce 2-3 eggs each, the eggs are blue-green, and there will be reddish brown spots on it.The hatching takes half a month, usually completed by female birds, and the male birds will be guarded around during the period.