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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 Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
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.

By Troutnut on July 19th, 2019, 10:14 am EDT
In the past month I've added a large number of new specimens to the insect encyclopedia, photographed on trips to the Montana/Wyoming/Idaho area for the last two summers. I haven't learned my Western hatches very well yet, so I'm relying on expert help (or slowly trudging my way through keys as time allows) to identify most of them.

To make this process easier and also catch up on specimens that have fallen through the cracks over the years, I created a page that automatically lists specimens that aren't identified as specifically as one could reasonably expect. I'll use this to guide my own ID attempts and I hope it helps some of the other experts who like to weigh in here.

The new page is called identification needs, and it's linked from the top of the Aquatic Insect Encyclopedia page for easy access once this post falls off the front page.

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