The pattern notebook · emerger
CDC Biot Caddis Emerger
How do you tie a CDC Biot Caddis Emerger?
CDC Biot Caddis Emerger is a emerger fly pattern for trout. Find its 9 materials and 22 tying steps below.
- Difficulty
- 4 of 5
- Target species
- trout
- Pattern designer
- Harry Mason
Added to catalog · Updated
At the vise
Materials
- Hook: Dry fly hook 1XL #14
- Thread: Benecchi 12/0, black
- Shuck: Z-lon, silver - sparse
- Abdomen: Goose biot, dyed tan
- Thorax: Ice Dub, olive - very slender
- Underwing: Z-lon, silver
- Wing/legs: CDC, natural
- Antennae: Lemon woodduck barbs
- Head: Peacock herl
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Tying instructions
Secure the hook in the vise and start the thread just behind the eye.
Run the thread down the shank a little ways and trim the excess thread.
Tie in a sparse amount of silver Z-lon at the tie-in point for the shuck.
Keep the Z-lon on top of the shank and run the thread to the end of the shank.
Trim the Z-lon to about 1/3 of the shank length.
Select a goose biot in a tannish color for the abdomen.
Note the small notch at the top of the biot and keep that on your right side, tying it in with the notch facing up.
Run the thread back to about 2/5 of the shank length.
Clip on hackle pliers to the biot and start wrapping the abdomen with touching turns.
Tie off the biot and trim the excess.
Dub a very small amount of olive Ice Dub onto the thread.
Cover up the thread wraps with the dubbing, forming a slight hump.
Tie in some more of the silver Z-lon for the underwing, using about twice the amount as the shuck, and tie it in at the center.
Fold back the remainder of the Z-lon to make the wing slightly fuller and trim it to the end of the bend.
Tie in two natural CDC feathers on top of the shank, lining up the tips.
Bunch the CDC together to form the wing, which should be about the same length as the Z-lon, or just a fraction longer.
Angle the CDC stems downwards and tie them down on either side of the hook.
Trim the CDC stems relatively short to form legs.
Tie in a single peacock herl to form the head.
Wrap the peacock herl and tie it off, taking it fairly low on the herl itself.
Snip away the excess peacock herl.
Perform a three-turn whip finish and trim the thread.