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 view of the pipeline, the Atigun River, and an impressive sunset/rise was one of my first views of the North Slope as I came through Atigun Pass in the middle of the night.

From the Atigun River in Alaska

Stream photos

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Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington

I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.

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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Male Paraleptophlebia sculleni Mayfly Spinner Pictures

For a species not yet reported in my state, I've been surprised to find these in two different locations lately. I was tempted to think they're the more common Paraleptophlebia debilis, but the characteristic big dorsal bump on the claspers just isn't present.

Ruler view of a Male Paraleptophlebia sculleni (Leptophlebiidae) Mayfly Spinner from the Middle Fork Snoqualmie River in Washington The smallest ruler marks are 1 mm.

Lateral view of a Male Paraleptophlebia sculleni (Leptophlebiidae) Mayfly Spinner from the Middle Fork Snoqualmie River in Washington

Male Paraleptophlebia sculleni (Leptophlebiidae) Mayfly Spinner from the Middle Fork Snoqualmie River in Washington

Dorsal view of a Male Paraleptophlebia sculleni (Leptophlebiidae) Mayfly Spinner from the Middle Fork Snoqualmie River in Washington

Ventral view of a Male Paraleptophlebia sculleni (Leptophlebiidae) Mayfly Spinner from the Middle Fork Snoqualmie River in Washington

This mayfly was collected from the Middle Fork Snoqualmie River in Washington on August 4th, 2019 and added to Troutnut.com by Troutnut on August 5th, 2019.

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