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.

Mount Deborah and Hess Mountains. Two of the greatest peaks of the Alaska Range rise behind the braided, glacial Susitna River. These massive mountains are 35 miles north of where I took this picture.

From the Susitna River in Alaska

Stream photos

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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

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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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Cinygmula (Dark Red Quill) Mayfly Nymph Pictures

Dorsal view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the South Fork Snoqualmie River in Washington

Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the South Fork Snoqualmie River in Washington

Ruler view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1 mm.

Lateral view of a Cinygmula (Heptageniidae) (Dark Red Quill) Mayfly Nymph from the South Fork Snoqualmie River in Washington

This mayfly was collected from the South Fork Snoqualmie River in Washington on June 13th, 2019 and added to Troutnut.com by Troutnut on June 14th, 2019.

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