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.

Inlet of Upper Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

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.

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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.

Quick morning at the South Fork Boise

By Troutnut on October 13th, 2020

On the way home from deer hunting somewhere in Idaho, I had just a couple hours to check out the South Fork Boise River. I drove up and down the canyon for a bit, looking at the water, trying to decide where to stop to fish. Eventually I found some fish rising to some little Baetid duns, and I waded into a bouldery tailout to try for them. They stopped rising pretty quickly, so I switched to my Euro nymphing rig. I hooked two nice rainbows in quick succession, landing a snaky, geriatric-looking 19.5" rainbow and losing one that was a bit shorter but a lot stronger.