A very active fly because of the unique V wings.
Hook: Mustad 9840, size 6-10
Tail: Marabou fibers
Body: Rabbit fur
Wing: thin curved plastic strips
Thread: Monocord
The wings are the real story with this fly, allowing for a very active twitching retrieve. There are a number of sources for the plastic strips. It needs to be hard plastic, but thin enough to cut smoothly with scissors. The curve comes from heating the plastic against a metal cylinder of the correct diameter (such as a metal pipe or copper tubing). It's an art to get the bend correctly, as the metal must be warm enough to allow the plastic to curl, but not so hot that it starts to curl in on itself or fully melt. Careful use of a butane torch is the best and cleanest way to heat the tubing, and test strips to test when the metal has cooled sufficiently. Care not to burn fingers is a top priority. Make the strips longer than needed, then trim down.
Once the strips have been correctly bent, they need to be trimmed to match and balance in pairs, with tabs at the nose for attaching to the hook shank. Balance is more important for the cast, as improper cut or placement will equate to line twist on the tippet during the cast. Bending and cutting these wing strips should take place before approaching the vise. Be sure to save them as balanced sets.
Once the strips are ready, it's simple. Set the foundation and cement, tie in the tail, dub the fur and wrap, then tie in the pair of wings at the nose, being careful about balancing the placement of the pair. Finish with a wrap knot.
The fly needs a fairly heavy line for its size, since the wings are wind resistant. Cast short distances and play the retrieve slowly. Twitching the fly forward compresses the wings with water resistance. Then the wings spring back, forcing the fly immediately into reverse. This erratic motion is a sure trigger for fish waiting below. Even those not interested in feeding will strike out of annoyance.