Hook 3XL streamer hook (a nymph hook works if fishing it as a big nymph), #6-12 (tied on a #10)
Thread Black 70 denier
Materials
Rooster hackle fibers (tail) Brown / dark ginger (badger also works) (10-12 fibers, about two-thirds of a body length)
Wire rib, small (optional) Silver or gold rib wire (One strand)
Mohair or angora/wool blend (body) Olive brown zelon (A thick, loose four-inch noodle)
Bear hair (wing) Black ostrich herl (20+ hairs (the original is tied much sparser))
Rooster hackle (collar) Brown / dark barred ginger rooster hackle (One feather, four or five turns)
How to tie it
Pinch the barb, mount the 3XL hook and lay a black thread base back to the start of the bend.
Tie in 10-12 brown hackle fibers as a tail, about two-thirds of a body length long.
Tie in small silver wire at the base of the tail for the rib. It is optional in the original recipe, but it is what holds the fuzzy body together rather than being decorative.
Wax the thread generously and spin on a thick, deliberately loose noodle of mohair (or a wool and angora goat blend), about four inches long.
Wrap a fat, shaggy body forward, stopping well short of the eye to leave room for the wing and collar.
Counter-wrap the wire rib forward in fairly close, tight turns to lock the fuzzy body down, tie it off with a couple of tight wraps and helicopter off the excess. Cover any sharp nub with a few wraps.
Rough the body up hard with a velcro stick or dubbing brush until it is as shaggy as you want - Polly Rosborough fuzzy-nymph shaggy.
Tie in a bunch of black bear hair as a wing, a little shorter than the tail but well past the bend, then trim the butts and smooth the underbody with a few wraps so the hackle wraps cleanly.
Tie in a brown hackle by the tip (create a small notch at the tie-in) and take four or five turns, pulling the barbs back as you go so the short barbs land first and the longer ones finish the collar. Secure and trim the excess.
Sweep the collar back, build a ramped thread head until the barbs sit swept back rather than perpendicular, whip finish and add a drop of head cement. No other cleanup, the fly should look shaggy.