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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.

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington
This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.
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.

Taxon's blog & contributions

Taxon's blog & contributions

About Taxon (Roger Rohrbeck): My interest in identification of aquatic insects developed as a natural byproduct of transitioning from other methods of fishing to fly fishing during my early 40�s. However, it was not until my retirement, which followed a 35-year career in information technology, that I was afforded the opportunity to fully pursue study of aquatic entomology and taxonomy.

Within several years following retirement, I had accumulated an enormity of texts and notes on aquatic entomology and taxonomy. And, it was becoming readily apparent that some manner of organizing and accessing that information was sorely needed, as accurate memory of minutia was definitely not my strong suit.

My initial approach was to organize all the information in an Access database, but it didn�t take long to realize that this approach (alone) would not allow sharing the information with other flyfishers. So, I developed a website, which was initially just many entomology-related pages on the website of the flyfishing club to which I belonged. However, as my ever-increasing need for storage began to cause a problem, I took the big plunge, and got my own domain name and hosting provider. To date my website has received in excess of (300,000) separate visits, from (125) countries, representing all (6) inhabited continents.
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