Parks Salmon Fly:
Created in 1954 by Merton Parks, this is the original version of the Improved Sofa Pillow. Fish it damp as often as floating high, especially at the tail end of the salmonfly hatch. Richard Parks, Merton's son is the owner of Parks Fly Shop located in Gardiner, MT at the north entrance of Yellowstone National Park. http://www.parksflyshop.com/
This is my favorite Salmon fly pattern, highly effective and a Yellowstone area classic.
See Richard tying the Parks Salmon Fly here: http://www.youtube.com/watch?v=8HkEP8eub-o
Hook: Mustad 9671 2xl nymph, #2-8 with 6 most common
Thread: Heavy and black: Gudebrod G, flat waxed mono, Kevlar or 3/0 Uni
Tail: natural brown bucktail, long length of body
Body: tangerine orange Red Heart Acrylic yarn wound over Duco cement for durability
Palmer hackle: Brown or furnace saddle, clipped even with the gape on sides and bottom, basically flat on top.
Wing: Natural brown bucktail, slightly longer than the tail, full.
Hackle: 3-4 strung dark brown or furnace saddles (or mix). Choose hackle with little web. If you have a high-grade neck or saddle with web-less feathers in sufficient size, use two feathers. Wrap each feather individually, filling in gaps left by the previous hackle(s).