One of the most popular mayflly patterns is as simple as it is effective.
 
The CDC keeps the fly near the top of the film, it has a slim/ realistic profile and the trailing shuck adds the finishing touches.
 
Throw this behind another mayfly during the height of a hatch!
 
Recipe-
Hook: Tiemco 2488
Thread: Veevus 14/0
Shuck: Z-Lon
Body: Superfine Dubbing
Wing: CDC Oiler Puff