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.

This little pool in update New York is enjoyed by many tourists every day, and it still holds a few trout -- stockers mostly, but you can't complain about the setting!

From Mystery Creek # 62 in New York

Stream photos

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Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Perlodidae (Springflies and Yellow Stones) Stonefly Nymph

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington

This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.

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.

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Updates from July 30, 2007

Closeup insects by Bnewell from Flathead Lake and Kintla Lake in Montana

Paraleptophlebia bicornuta (Mahogany Dun) Mayfly Nymph

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Paraleptophlebia bicornuta (Leptophlebiidae) (Mahogany Dun) Mayfly Nymph from Flathead Lake in Montana

This species is interesting because it is common in lakes as well as streams. It is one of the last species of the year to emerge in western Montana. Adults have been collected as late as October 15 weather permitting.

Collected July 30, 2007 from Flathead Lake in Montana

Added by Bnewell on June 26, 2011

Collected July 30, 2007 from Flathead Lake in Montana and added by Bnewell on June 26, 2011

Ecdyonurus criddlei (Little Slate-Winged Dun) Mayfly Nymph

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