What is banding?
The babies should be “closed-banded” so that records can be kept. If you wish to show your birds, you will have to use bands issued by the American Budgerigar Society, or some other official organization. The young are banded before they develop pin feathers. Then, the toes are still pliable and can be manipulated and pulled through the ring. In a few days, the toes grow and the bones harden. After this time, the ring will neither go on or off.
Get closed bands for your infants. When the babies get pin feathers, the main group of toes can be pointed forward, and the last one pointed back. Then the closed band can be slipped onto the leg. Once the bones of the toes harden, a band can not be slipped on or off. This gives a permanent identifying mark.