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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 Psychodidae True Fly Larva from Mystery Creek #308 in Washington
This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.
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.

Hesperoperla pacifica (Golden Stone) Stonefly Nymph Pictures

Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Artistic view of a Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Ventral view of a Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Dorsal view of a Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington
Ruler view of a Hesperoperla pacifica (Perlidae) (Golden Stone) Stonefly Nymph from the Yakima River in Washington The smallest ruler marks are 1 mm.

This stonefly was collected from the Yakima River in Washington on April 24th, 2022 and added to Troutnut.com by Troutnut on April 27th, 2022.


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Hesperoperla pacifica (Golden Stone) Stonefly Nymph Pictures

Collection details
Location: Yakima River, Washington
Date: April 24th, 2022
Added to site: April 27th, 2022
Author: Troutnut
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