Okay, so I've only had peafowl for a few years now, so I don't really have a clue!
I noticed that several of my pea-teens and all of peahens have some white wing feathers. Some have white primaries and some have white primary coverts. I've also noticed that a couple of them have very small patches of white on their throats (1/4" x 1/4"). Does this mean anything?

Source: http://swittersb.wordpress.com/2011/03/05/fly-tying-a-whole-wing-what-to-do/wing-anatomy/

Source: http://swittersb.wordpress.com/2011/03/05/fly-tying-a-whole-wing-what-to-do/wing-anatomy/