Swedish version

C.D.C. Emerger
Presented by Sean Andrews

CDC Emerger, tyed and photographed by Sean Andrews
Photo: Sean Andrews ©


I am not sure of the origins of this simple pattern. In Europe it would probably be known as a C.D.C. emerger and I once saw a pattern in America that reminded me of this fly that was called an RS2 emerger.

I first started tying it for myself because I wanted a fly that would hang in the surface film. It worked so well that I am now tying two different variations in two different colours. In the first variation I use peccary (wild pig) for the tails and grease the fly with floatant so that it sits just on the film similar but more durable than a no-hackle Dun.

The second variation uses brown Z-lon for the tail instead of the peccary. This causes the fly to sit much lower and hang in the film. I do not use any floatant when fishing this fly as I want it too hang as low as possible in the film as an emerger. Tied this way the fly is based upon that wonderful fly the Sparkle Dun by Craig Mathews but uses C.D.C. for the wing instead of deer hair.

It has proved to be exceptional in all kind of circumstances mainly to represent hatching mayflies but will also pass as a hatching midge.

Earlier this year I was fishing with two members of the New Zealand fly fishing Team, Mike Stent and Derek Nees in the mountains in Norway. When we arrived at the river there were fish rising everywhere we all tried numerous patterns but nothing seemed to work. There was no sign of any insect life on the water. I then found several of these flies in my fly box tied with the Z-Lon tail and began to catch fish consistently with them. I have since used the fly in America this autumn where it worked exceptionally well on both the Missouri river and several Spring Creeks as a Baetis emerger.

I am now looking forward to testing it in the spring when the first of the Olives begin to hatch.

Hook: Standard dry fly (Tiemco 100)
Tail: Peccary fibres or brownZ-Lon
Body: Natural dubbing shades of Grey and Olive
Wing: 2 C.D.C. feathers back to back

Photo and text: Sean Andrews 2001 ©
Sean Andrews is a professional flytyer.


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© Mats Sjöstrand 2004

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Mats Sjöstrand, Sweden

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