Instructions:
This is a generic pattern fly that can be tied to match your local hatch.

Dress your usual mayfly tail and body, then take a very large cock hackle and follow the sequences in the drawings.

Give it a try!

Instructions

Step One: Prepare hackle by stripping away the fibers from the base and stroking the fibers from one side toward the base.

Step Two: Tie the hackle in on edge catching the stalk and the fibers which has been stroked down.

Step Three: Adjust the position of the hackle then lock down with several tight turns.

Step Four: Wind hackle over front 1/3 of hook shank (hackle omitted for clarity).

Step Five: Pull the hackle fibers forward over the hackle and tie in at the head.