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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.

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
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.

Troutnut.com User Troutnut (Jason Neuswanger)

Troutnut.com User Troutnut (Jason Neuswanger)

Real Name
Jason Neuswanger
Bellevue, WA
Biography & Thoughts
I'm a salmonid research scientist with the Washington Department of Fish and Wildlife since 2022. I completed my Ph.D. in 2014 at the University of Alaska. I created Troutnut.com in February 2004 and worked on it full-time during various short breaks from school and work.
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Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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