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The pattern notebook · nymph

20 Incher Stonefly

How do you tie a 20 Incher Stonefly?

20 Incher Stonefly is a nymph fly pattern for trout. Find its 9 materials and 22 tying steps below.

Difficulty
3 of 5
Target species
trout
Pattern designer
Cheech

Added to catalog · Updated

At the vise

Materials

  • Hook: Daiichi 1260 #10 (or TMC 200R)
  • Bead: 3.8mm Copper (or 3.3mm)
  • Wire: 020 Wire
  • Thread: UNI 8/0 Camel
  • Tail: Goose Biots, Brown
  • Body: Peacock Herl
  • Wingcase: Turkey Tail
  • Legs: Partridge
  • Head Cement: Loon Water Based Head Cement

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Tying instructions

  1. Slide bead onto hook and secure hook in vise.

  2. Wrap 020 wire from behind the bead to the bend, making 13 or so wraps (odd number).

  3. Wiggle off excess wire and smooth with fingernail, then push up behind the bead to secure it.

  4. Start thread behind the wire and wrap down the bend to the point where the barb was mashed.

  5. Build up a small bump of thread at the tie-in point for the tail.

  6. Select two brown goose biots and align them back-to-back so they split away from each other.

  7. Tie in the goose biots as a split tail, gauging the length.

  8. Wrap thread forward to the end of the wire.

  9. Select 3 peacock herls, align the tips, and trim.

  10. Tie in the peacock herls at the tie-in point.

  11. Wrap the peacock herls forward to create a tapered body, ending behind the bead.

  12. Secure the peacock herls and trim the excess.

  13. Tie in the copper wire at the tie-in point.

  14. Wrap the copper wire forward in open spirals to create a rib, securing at the front.

  15. Helicopter off the excess wire.

  16. Select a section of turkey tail and tie it in as a wingcase, extending over the body.

  17. Select a partridge feather and tie it in so the fibers extend to the sides as legs.

  18. Pull the turkey tail wingcase forward and secure behind the bead.

  19. Trim the excess turkey tail.

  20. Apply head cement to the thread wraps behind the bead.

  21. Pick out the dubbing to make the fly more buggy.

  22. Apply head cement to the belly of the fly to keep the fibers from coming down.