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The Best Anglers Never Stop Learning

The Best Anglers Never Stop Learning

Emerger

Bio Biot Fly

Insect Species Icon Quill Gordon, Blue Wing Olive, Hendrickson and 6 others
Difficulty Icon Medium - 5-7 Min
Water Category Icon Coldwater

Tying Video

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Tying Recipe
  • Hook: Standard jig nymph hook size #14
  • Bead: Slotted tungsten 3mm copper
  • Thread: UTC 70 denier brown olive
  • Tail: Coq-de-Leon
  • Body: Turkey biot blue wing olive
  • Rib: UTC ultra wire small black
  • Wing: CDC feather
  • Collar: SLF squirrel spiky dubbing natural fox
  • Hook: Feel free to use any jig nymph hook that you like. Standard hooks can also work for this pattern.
  • Bead: Slotted beads are required for jig hooks. Standard beads if you use a standard nymph hook.
  • Thread: Use any thin diameter thread that you like. The thinner the better, and try not to go thicker than 8/0 or 70 denier.
  • Tail: Pheasant tail is always a good nymph tail. Wood duck flank or teal can give that mottled look as well.
  • Body: If you want to keep that ribbing effect, try some vinyl rib or some midge tubing.
  • Rib: Use any small round wire that you like.
  • Wing: CDC works best here, but a turn or two of a partridge feather can work just as well.
  • Collar: Use any natural dubbing that you like. Squirrel and beaver dubbing work well.

This fly already has a lot going on with it. Especially with the soft hackle plus dubbing combination collar, and the biot and wire combination for the body. Feel free to substitute materials as you like though. D-rib or midge tubing can make a great synthetic body, or magic quills can create a colorful body that still has ribbing effects.

This is a very general mayfly emerger pattern that can imitate just about any mayfly species. This is a great fly to have as a dropper in the summertime when many different species of mayflies are present. The jig hardware allows this fly to ride hook point up, which makes it less prone to snags, so you can fish it close to the bottom with confidence.

Fish this like any other mayfly nymph, either as the point fly under and indicator or on a euro nymph rig, or under your favorite dry fly. With this being more of an emerger pattern, a perfectly dead drift is not necessarily required. Even adding a little swing to the end of a drift could get a fish to chase the fly.

Blue Wing Olive

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: West
Blue Wing Olive
Sizes: #16 - #24
Region: Northwest
Blue Wing Olive
Sizes: #16 - #24
Region: East
Blue Wing Olive
Sizes: #16 - #24
Region: Southeast
Blue Wing Olive
Sizes: #16 - #24
Region: Midwest
Blue Wing Olive
Sizes: #16 - #24

Brown Drake

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: West
Brown Drake
Sizes: #10 - #14
Region: Northwest
Brown Drake
Sizes: #10 - #14
Region: East
Brown Drake
Sizes: #10 - #14
Region: Midwest
Brown Drake
Sizes: #10 - #14

Hendrickson

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: East, Midwest
Hendrickson
Sizes: #10 - #16

Isonychia

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: East
Isonychia
Sizes: #12 - #18
Region: Southeast
Isonychia
Sizes: #12 - #18
Region: Midwest
Isonychia
Sizes: #12 - #18

Light Cahill

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: East
Light Cahill
Sizes: #12 - #20
Region: Midwest
Light Cahill
Sizes: #12 - #20
Region: Northwest
Light Cahill
Sizes: #12 - #20

Mahogany Dun

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: West, Northwest
Mahogany Dun
Sizes: #14 - #20
Region: East, Midwest
Mahogany Dun
Sizes: #14 - #20

March Brown

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: West, East
March Brown
Sizes: #10 - #14
Region: Northwest
March Brown
Sizes: #10 - #14
Region: Midwest
March Brown
Sizes: #10 - #14

PMD

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: West, Northwest, East, Southeast, Midwest
PMD
Sizes: #14 - #20

Quill Gordon

Regional Hatch Chart Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Region: East, Southeast
Quill Gordon
Sizes: #12 - #16

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