
CDC Emerger
The CDC Emerger is a versatile pattern that imitates mayflies and midges transitioning from nymph to adult in the surface film. CDC (Cul de Canard) feathers from a duck's preen gland provide extraordinary natural buoyancy, keeping the fly suspended perfectly in the film where trout feed on vulnerable emergers. Adaptable to match any hatch by changing body color and CDC shade.
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Materials
Tiemco 2487 or dry fly hook, sizes 12-20
Olive, grey, or black 8/0 or 70 Denier
Wood duck or mallard flank fibers
Hare's ear or olive Superfine dubbing
Fine gold or copper wire
Natural CDC feathers (gray, dun, or olive to match hatch)
Hare's ear dubbing, olive dubbing, or peacock herl
Grizzly or brown dry fly hackle
How to Tie the CDC Emerger
- 1
Step 1
Place the hook in the vise and attach thread behind the eye, wrapping back to the bend.
- 2
Step 2
Optionally tie in a few fibers of wood duck or mallard flank at the bend as a tail, about hook-shank length.
- 3
Step 3
Optionally tie in fine wire at the tail for ribbing.
- 4
Step 4
Dub the thread with hare's ear or olive dubbing and wrap a slender, slightly tapered body up to about two-thirds of the shank.
- 5
Step 5
If ribbing, spiral wrap the wire forward for segmentation, secure and trim.
- 6
Step 6
Select 1-2 CDC feathers, align the tips, and tie in on top of the hook so they extend over the bend to about two-thirds of the body length. The wing should stand upright or sweep slightly back.
Use the highest quality CDC for best buoyancy. Keep the fly sparse for soft or slow-moving water.
- 7
Step 7
Dub a small amount of hare's ear or olive dubbing around the base of the CDC wing for a slightly bulkier thorax.
- 8
Step 8
Optionally add 1-2 turns of grizzly or brown hackle behind the eye.
- 9
Step 9
Whip finish behind the hook eye and optionally apply a small drop of head cement.
Watch Tying Tutorial
https://www.youtube.com/watch?v=k4VrWRIMhPY
Credit: Traditional / Various