Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana

Salmonflies
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

The "Fountain Flats" stretch of the Firehole was fishable in the morning after an uncharacteristically cold August night.

From the Firehole River in Wyoming

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.

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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.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun Pictures

Lateral view of a Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun from the South Fork Snoqualmie River in Washington

Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun from the South Fork Snoqualmie River in Washington

Ruler view of a Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".

Dorsal view of a Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun from the South Fork Snoqualmie River in Washington

Ventral view of a Male Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Dun from the South Fork Snoqualmie River in Washington

This mayfly was collected from the South Fork Snoqualmie River in Washington on June 16th, 2018 and added to Troutnut.com by Troutnut on June 21st, 2018.

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