This fly should be a staple in any trout fisherman's fly box. The Bunny Dun can be tied to imitate a wide variety of mayflies, from Tricos to BWO's to PMD's. Simple to tie, and it catches fish. This is one that should definitely be in your fly box, it works!
Hook: Daiichi 1100 or Tiemco 100
Thread: 70 Denier Ultra Thread
Tail: Whiting Coq De Leon
Wing: Snowshoe Rabbit Foot Dyed Dun
Abdomen/Thorax: Nature's Spirit Finest Dubbing