There are no breeds of peafowl. There are three species -- India Blue, Green, and the Congo. The green is currently broken up into three subspecies, but some research is beginning to show that the "green species" is actually more than one species.
The varieties of peafowl you see are the result of mutations and/or hybridization. The mutations all occurred in the India Blue. There are no mutations in the Green. Spaulding is the name given to hybrids between the India Blue and the Green. If you see a "green" peafowl with a mutation (such as being pied or purple), it is a Spaulding.
There is a difference between a breed and a mutation. Take chickens, for example. A Leghorn is a breed of chicken, as is a Jersey Giant or an Orpington. Within these three breeds are different colors. So for example, Orpingtons come in a bunch of colors. However, the difference between the colors is just one or a few genes. The difference between an Orpington and a Leghorn is many more genes. That is why they are called different breeds.
In peafowl, all the varieties listed on the UPA website are the same as the different colors in Orpingtons. They are not the same as different breeds of chicken. What makes a peafowl Purple as opposed to a Bronze or an Opal is just one gene difference, and that small of a difference is not what a breed is. It may be called a variety, but "breed" is not the proper terminology.
