I agree with everyone else, use goose for the tails and turkey for biot bodies. I might suggest a variation to the Prince that I use. I twist my peacock with the tying thread when I wrap it. A guide in Wyoming I met dubbed the thread very lightly with red rabbit fur, then twisted the peacock herl and dubbed thread then wrapped the body. He claimed it made the nymph more effective. Maybe the red dyed peacock herls, LRO stocks, might be worth a try?