When it came to the wings, I was crazed! I designed and discarded 3 ideas.
What I finally settled on was to make the wings actually part of the body of the costume. A pvc pipe is inserted into the casing at the top of the wing and goes all the way to the wearers elbow.
They are quite large, about 5 feet each wing. The fabric is very light weight so it really billows.
The wearers' hand comes out the the sleeve and grips the encased pvc pipe right about where the claws are. The wearer has complete control of the manipulation of the wings! I think they turned out great!