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.

Of all the pools I've fished, this one was most deserving of the colorful little brook trout it held.

From Mystery Creek # 89 in New York

Stream photos

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Doroneuria baumanni (Golden Stone) Stonefly Nymph Doroneuria baumanni (Golden Stone) Stonefly Nymph

Dorsal view of a Doroneuria baumanni (Perlidae) (Golden Stone) Stonefly Nymph from Sears Creek in Washington

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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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More Baetis nymphs

Millcreek has attached these 7 pictures to aid in identification. The message is below.

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Aug 26, 2014August 26th, 2014, 7:47 pm EDT

Figured since there was a fair amount of discussion about Baetis nymphs lately I'd post these photos. They're all of the same species.

I've been able to key these nymphs to Baetis but have no idea which species they are. Any suggestions welcomed.

All were taken out of the Russian River. The nymphs range from 5.5-6.5 mm in length (excluding cerci). The date each photo was taken is under the photo. All specimens were alive when the photos were taken.

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