It seems like pheasant tail which is not in the original pattern. The orignal uses brown and grizzly hackle, yellow calf's tail for the wings, moose body hair for the tail and some type of ultrafine dubbing.
The 1st picture in this thread sure looks like there is a tightly dubbed body rather than Pheasant Tail. It doesn't look like Superfine, too course, more like fine Heather Wool but, I could be wrong on that. Regardless, if I were copying it, I would look for the color in Superfine. Of course mine wouldn't look half that good, even after 2 dozen.
The Rapidan..... I had never heard of before living in VA for a short stint. It's probably one straight from Murray's Fly Shop. A fine example to replicate. What does it immitate? Nothing and everything. Does it work.....yup. Why? I'll go ask a fish.
THE WONDERFUL MR. RAPIDAN FLY FAMILY The Wonderful Mr. Rapidan Fly Family. The Mr. Rapidan family of flies began in the early 1970’s at Murray’s Fly Shop in Edinburg, VA when two gentlemen in my advanced fly fishing class at Lord Fairfax Community College came to me with a simple request. They...