Thanks for kind words about the spaldings.
They get a lot of comments in person too, even had a few who admitted to not liking pieds finding themselves admiring those.
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A lot of the colors/patterns are really combinations of a color & pattern(s), when you get to the bottom of it, there are much fewer colors and patterns than it seems at first. For example, Purple is one, add Black shoulder and now you have Purple Black shoulder. Add pied and you have Purple Pied. Add to that Black shoulder and you have Purple Pied Black shoulder.. but when you get down to it on those birds, there's actually only purple, black shoulder and pied.. just three mutations- one color(purple) & two patterns(pied and black shoulder). Fortunately it is relatively easy to combine the various colors and patterns to get a broader spectrum of peafowl appearances..
All of the color and pattern mutations in captivity has been discovered in and bred from Indias. All spaldings get the various colors(pied, cameo etc) from Indias. One exception might be Jade, which apparently was discovered in Spaldings but then Spaldings are a mix of Indian and Green so that's a gray area right there.
There have been a few reports of white Greens showing up but have not personally seen pictures of them and AFAIK none of them are in USA.
In short it kind of is best to say that all color and pattern mutations in captivity so far all have their origins in the Indian gene pool. Not that it's impossible to get a new or independent mutations in any of the Greens. If a white can show up in Indians, in theory it can show up in pure Green stock.