Yellar Hammar Panfish Nymph
This pattern is a variation of the Southern Applachian Fly the Yellar Hammar. The fly's name comes from the unique material used in its construction. It was originally tied with the primary wing feather of a Yellow Flicker, a species of wood pecker that is now protected.
Hook: 3x long nymph hook of choice
Thread: Black 70 denier
Underbody: A few wraps of .010 - .020 lead wire
Tail: Gold Pheasant or yellow grizzly hackle fibers
Body: Yellow wool or floss or peacock herl for dark version
Hackle: Imitation Yellow Flicker feather palmered through body
Read about it here.