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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In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

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Limnephilus (Summer Flier Sedge) Caddisfly Larva Limnephilus (Summer Flier Sedge) Caddisfly Larva

Case view of a Limnephilus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from the Yakima River 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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Male Cinygmula (Dark Red Quill) Mayfly Spinner Pictures

I'm unsure of the ID on this one; keys put it closest to Cinygmula reticulata, but I'm very doubtful of the species and not positive on the genus. Epeorus is another possibility, but I don't know which species it would be.

This one was collected in association with a female dun probably of a different family.

Lateral view of a Male Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Spinner from the South Fork Stillaguamish River in Washington

Male Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Spinner from the South Fork Stillaguamish River in Washington

Dorsal view of a Male Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Spinner from the South Fork Stillaguamish River in Washington

Ventral view of a Male Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Spinner from the South Fork Stillaguamish River in Washington

Ruler view of a Male Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Spinner from the South Fork Stillaguamish River in Washington The smallest ruler marks are 1/16".

This mayfly was collected from the South Fork Stillaguamish River in Washington on July 1st, 2017 and added to Troutnut.com by Troutnut on July 2nd, 2017.

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