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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.

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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Agresens has attached this picture to aid in identification. The message is below.
Kinderhook, NY

Posts: 3
Agresens on Feb 20, 2019February 20th, 2019, 9:30 pm EST
Found this on 2/18/19 in the Kinderhook Creek, NY near Valatie, NY.

There were lots of "winter stoneflies" (Capniidae) around but this one looks different.

Any idea?

Healdsburg, CA

Posts: 344
Millcreek on Feb 21, 2019February 21st, 2019, 2:00 pm EST
August - Might be an Isoperla. They're usually pretty distinctively marked but some aren't. Here's a link to one that looks similar.
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
Grants Pass, OR

Posts: 302
Creno on Feb 21, 2019February 21st, 2019, 3:09 pm EST
Another good place to look for determined images of immature aquatic insects is Bob Henricks pages - https://www.instagram.com/buddhabob2hanlubo/ and aquaticinsectsofcentralvirginia.blogspot.com

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