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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.
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A few good small creek bugs

A few good small creek bugs

By Troutnut on June 12th, 2022
I was traveling on the east side of the Cascades today, where all the rivers are ridiculously high from a combination of snowmelt and rain. It's dangerous to even get in the water. But I found a place to sample a few bugs in a small creek and added a couple stoneflies from my to-do list.

Closeup insects by Troutnut from Swauk Creek in Washington

Dorsal view of a Doroneuria baumanni (Perlidae) (Golden Stone) Stonefly Nymph from Swauk Creek in Washington
I'm not aware of any way to tell the two species of Doroneuria apart as nymphs, so this one is classified to species based on location alone. Doroneuria baumanni is found in the Cascades and in Washington, and the other species is not known here yet.
Dorsal view of a Alloperla (Chloroperlidae) (Sallfly) Stonefly Nymph from Swauk Creek in Washington
Ruler view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from Swauk Creek in Washington The smallest ruler marks are 1 mm.
This one doesn't have the protruding mouthparts typical of Cinygmula, but I think it's just an oddball individual.

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