Here is the fly pattern sheet for the Biot Backed Stonefly, a fly created by Devin Olsen.

Biot Backed Stonefly | www.johnkreft.com
Biot Backed Stonefly - Top View | www.johnkreft.com

Materials

Hook:

Daiichi 1720, #6-10

Bead:

Tungsten gold

Thread:

Danville 70 denier, tan

Weight:

.025

Rib:

D Rib – brown or golden stone – medium

Dubbing:

Spirit River UV2 Caddis/Nymph dubbing – Golden Stone

Shellback/wingcase:

Spirit River UV2 goose biots – brown

Legs:

.Life Flex (Hareline code: LFX #40 brown)


Personal tying notes:

  • Tungsten beads and hooks – 4.0 for #6, 4.0 for #8, 3.0 for #10.
  • Original pattern called for D rib; I used Vinyl rib, medium. Consider using size small for #10.
  • Consider using UV resin to cover thorax portion of biot to provide additional strength.

Here is a link to the YouTube video with Devin tying the fly:

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