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

Caudatella Mayfly Cripple|www.johnkreft.com

Here is the real bug.

Caudatella Mayfly|www.johnkreft.com

Materials

Hook:

Daiichi 1280, #12 – 14

Thread:

8/0 olive brown

Tail:

Zelon – mayfly brown

Rib:

Uni-floss 1X – brown

Body:

Superfine dubbing – gray/olive

Wing:

EP Trigger Point Fibers – light or medium dun

Hackle:

Light or medium dun

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.

Fly

Size

Shuck Color

Body Color

Baetis

#18 – 24

Gray

Grayish-olive

PMD

#14 – 18

Brown

Yellowish-olive

Flav

#14 – 16

Brown

Olive

Green Drake

#10 – 12

Brown

Olive, ribbed w/ yellow thread

Brown Drake

#10 – 12

Light brown

Tan, ribbed w/ brown thread

Trico

#18 – 22

Brown

Black or olive. Use white deer hair for wing if desired

Callibaetis

#14 – 18

Gray

Gray or tan

Epeorus

#14 – 16

Amber

Yellowish-olive

Drake Mackeral

#12 – 14

Brown

Tan, ribbed w/brown thread

Mahogany Dun

#16

Brown

Mahogany

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

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