Here is Hedwig's daddy, Isaac. Hot today so he was drooping his wings a bit, but though he is a bit dirty, you can see he isn't really yellowing like some do. He has several very dark tail feathers, but they are not solid black--all are barred, albeit sort of "ghosty".
Here is Ellie in close up so you can see her comb:
Here is Ellie in close up so you can see her comb: