WD - 40
This fly was first tied in 1982 for Colorado's Frying Pan River, by Mark Engler. It imitates the larger midges that get trapped in the shuck for extended periods. It is more a style of midge emerger than a specific pattern. Thread and dubbing can be chosen to match the color of any natural, the most popular colors being Olive, Black, Dark Brown, Gray, and Rust. The WD stands for "Wood Duck", of which each pattern uses this material for the tail and wingcase. The original WD-40 had an olive thread body and a muskrat thorax. There are some substitutions in which the Wood Duck wingcase has been replaced by Krystal Flash or Razor Foam. You can also easily incorporate legs to the pattern by utilizing the butt ends of the wingcase rather than trimming them flush to the shank.
Today, the WD-40 is also used to imitate a mayfly and can be tied in colors to match the emerging nymph. This version usually has legs formed from the wood duck wingcase.
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|Hook:||TMC 2487, Size 18-24.|
|Thread:||8/0 UNI Thread Olive.|
|Body:||Olive UNI Thread 8/0 Olive.|
|Wing Case:||Lemon Wood Duck.|
- Start your thread and coat the shank of the hook approximately half way down the bend of the hook.
- Tie in a clump of Wood Duck to form the tail. The tips should be extending back off the bend of the hook and the tail should only be about a gap of the hook in length. From the tie in point completely coat the shank of the hook with thread while tying down the butts of the tail. Tie them down to about three thread wraps past the point of the hook. DO NOT cut them off. These will form your wingcase.
- Now fold the butts back toward the tail and tie them down so that they are tied down just above the point of the hook.
- Dub a small egg shaped thorax leaving just enough room for the head.
- Pull the wingcase over the thorax and use two thread wraps to secure it.
- Clip the wingcase, form a small head and whip finish. Apply head cement, if desired.
To tie a Wd-40 with legs, skip the last step above and continue below
- Now pull back 3-5 Wood Duck fibers onto each side of the thorax and tie them down using minimal thread wraps. These will form the legs. Build your thread head while whip finishing in order to reduce the amount of bulk.
- Cut the legs so that they are just longer than the thorax.
- form a small head and whip finish. Apply head cement, if desired.
T. Hargrove Fly Fishing Inc,
Saint Louis, Missouri 63144
Phone - 314.968.4223
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