To put a ring on a parrot, follow these steps:

1. Gently catch and hold the parrot securely, but not tightly, to prevent injury.

2. Examine the leg to determine the size of the ring needed and to ensure that it will fit properly.

3. Select the appropriate size ring and place it on the leg.

4. Secure the ring in place, making sure it is not too tight or too loose.

It is important to handle the parrot with care and to make sure that the ring is not too tight or too loose, as this could cause discomfort or injury to the bird. Ringing parrots is often done by breeders to keep records of the breeding and to identify individual birds, but it may also be done by bird rehabilitation centers or wildlife organizations to track the movements and habits of wild parrots.