How long will the ten sisters be born until flying

The ten sisters were born to fly for about 20 days.This bird's artificial hybrid variety, breeding requires a certain amount of materials to build nests, and usually uses brurders, feathers, etc. as materials.Usually, 5-6 nests can be produced a year, 3-5 of the first nest, and the second nest will increase to about 8.This bird's hatching takes 12 days, and the feathers can grow after 21 days of shell.