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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.


Posts: 37
BGrnFlyfish on Feb 18, 2008February 18th, 2008, 1:04 pm EST
To anyone out there; the Serendipity-kinda of a dumb question but i've been told a dumb question is a question unasked. What does this imitate and what colors do you recommend? Red, Green, Tan?
Seth-Big Green River, WI
Troutnut's profile picture
Bellevue, WA

Posts: 2758
Troutnut on Feb 18, 2008February 18th, 2008, 4:05 pm EST
I haven't used that pattern so I'm not very familiar with it, but based on googling it, it seems to be intended to imitate a caddis pupa, or sometimes a midge pupa. Therefore the colors and size that work best would depend on what's hatching at the time. I would guess olive is a good overall bet.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
CaseyP's profile picture
Arlington, VA/ Mercersburg, PA

Posts: 653
CaseyP on Feb 19, 2008February 19th, 2008, 3:51 am EST
the one day i used it, it was red, maybe 18 or 20, and worked a treat. it was April on the Little J.
"You can observe a lot by watching." Yogi Berra

Posts: 37
BGrnFlyfish on Feb 19, 2008February 19th, 2008, 4:12 am EST
Thanks guys!
Seth-Big Green River, WI
Potter County, PA

Posts: 144
SlateDrake9 on Feb 23, 2008February 23rd, 2008, 2:54 pm EST
I've never seen one that wasn't an olive brown color.

I always assumed they were midge pattern, but I guess they could be a small caddis. I've only fished them in 18-22 sizes.
Fishing with bait is like swearing in church.
-- Slate Drake

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