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CDC Thorax Dun Tying Materials

The CDC Thorax Dun is one of our favorite flies to fish during the Blue Winged Olive mayfly hatch! We used olive colored materials in this video to match Blue Winged Olive mayflies, but you can alter the color and size to match other species. This pattern works very well for Pale Morning Duns - adjust the biot color and dubbing color to a pale yellow or PMD yellow. This fly is a staple in our boxes from Spring through Fall!

CDC Thorax Dun Fly Tying Materials

  • Hook: Daiichi 1100 or Tiemco 100 Dry Fly Hook size 14-22
  • Thread: 70 Denier Ultra Thread
  • Wing: Natural Dun CDC (Cul de Canard)
  • Tail: Coq de Leon Fibers
  • Abdomen: Turkey Biot dyed to match natural
  • Legs/Hackle: Dun Dry Fly Hackle
  • Thorax: Nature's Spirit Fine Natural Dubbing