Craven designed one of the most versatile mayfly imitations with this one!
 
While everyone is fishing RS2's, which is hard to beat, this fly will stand apart. Like an RS2, this fly can be nymphed or fished as an emerger. This pattern can mimic one more important stage- a drowned spinner.
 
One of our favorite mayfly imitations.
 
Recipe-
Hook: Tiemco 101 (16-24)
Tail: Tailing Fibbetts 
Thread: Veevus 14/0
Abdomen: Gray Beaver or Muskrat Dubbing
Wing: White Fluro Fiber
Hackle: Med Dun Hen Neck Hackle, Soft
Thorax: Gray Beaver or Muskrat Dubbing