Brad a "Blue Goose" is one of those genetic things that happen ever once in awhile. It's more of a Trophy Snow Goose since they are rare.
Snow Goose
Blue Goose
As you can see they are very distinct, but when I had over 400 of the Snow Birds coming in at me, I was in awe just enjoying the site, and unlike the locals who were hunting with us, I definately didn't have the trained eye to find the Blue Geese!