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.

Stream photos

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Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington

I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.

11 Recently Added Photos

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.

Summer 2015 Fieldwork Video

By Troutnut on June 27th, 2015, 10:10 pm EDT

This summer is intensely busy because we're beginning the first season of real fieldwork on a complicated new project. We just completed June sampling and I put together a video of what we're doing, including some really nice fish videos of feeding juvenile Chinook salmon, dolly varden, and Arctic grayling in interior Alaska:

More details about the project, including context for some of the things in the video, are available at the Drift Model Project website.

Comments / replies

Catskilljon
Upstate NY

Posts: 160

Catskilljon on Jun 28, 2015June 28th, 2015, 6:53 am EDT

Well done Jason! That was the best flick I have seen in years. Seeing those little DV taking food off the top...you just cant not smile. Very well done. CJ

Oldredbarn

Novi, MI

Posts: 2600

Oldredbarn on Jun 28, 2015June 28th, 2015, 2:18 pm EDT

"Balloon Popper"...I like that Jason...

Looks interesting. Great video. I'm going to have to visit the other site and find out what those measuring things are you are placing in the water...?

Thanks for sharing.

Spence

The thickest midge hatch I’ve ever seen made it impossible to drive the boat without sunglasses, and even then I was constantly wiping my eyes to clear out the ones that slipped past the glasses.

Don't let Tony (Gutcutter) see this! He'll be on a plane heading your way by morning with his 4wt and his 10x tippet, and size 30 flies! :)

"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood

Martinlf