Caudatella Mayfly Cripple

Here is the fly pattern sheet for the Caudatella Mayfly Cripple.

Here is the real bug.

Materials

Directions

1. Attach thread to hook behind hook eye and wind backwards about halfway.
2. Tie in Zelon and hold upwards and on top of hook while continuing to wrap thread just past hook bend.
3. Tie in rib material.
4. Add dubbing to thread and wind forward until 2/3 point.
5. Wind rib material forward and tie off.
6. Tie in wing material, allowing materials to extend over hook eye. Wrap tightly as materials are slick. Cut rear section and leave small tuft.
7. Tie in hackle. Place 3 wraps behind wing and lift wing material up and place 2 wraps in front. Tie off hackle and cut excess.
8. Whip finish.
9. Trim tail 2/3 body length.
10. To trim wing, pull wing back and trim at end of body.
11. Trim hackle bottom even with hook point to allow low profile in water.

Here are other popular versions. On smaller flies, use thread for body rather than dubbing to create slim profile.

Source: Fly Patterns of Yellowstone, Volume 2 by Craig Matthews & John Juracek