What does the green ring on the feet of the pigeon represent?

The green ring on the feet of the pigeon represents that it is a pigeon. Generally, there will be codes on the ring, which represents its location, year of birth, and so on.Pigeons are a kind of birds that are good at flying, and they can grow to home. Therefore, in the past, it was mainly used for communication, and some small items could be transported.In addition, the pigeons can also be allowed to play. Such a pigeon is also called pigeon racing. It is usually trained to be called a qualified racing pigeon.