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.

Turquoise view of Upper Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Kogotus Stonefly Nymph Kogotus Stonefly Nymph

Dorsal view of a Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington

This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.

8 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.

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Stonefly identification , Page 2

Uppersac has attached these 5 pictures to aid in identification. The message is below.

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Jul 22, 2015July 22nd, 2015, 6:56 pm EDT

John -

I'm still not sure although if I had to guess it would be Doroneuria.
This may help. It's a guy who does mostly eastern bugs but occasionally does some western critters.

http://aquaticinsectsofcentralvirginia.blogspot.com/2011/11/finding-new-genera-in-shadow-of-mt-hood.html

Mark

"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein