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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.

Dorsal view of a Amphizoa (Amphizoidae) Beetle Larva from Sears Creek in Washington
This is the first of it's family I've seen, collected from a tiny, fishless stream in the Cascades. The three species of this genus all live in the Northwest and are predators that primarily eat stonefly nymphs Merritt R.W., Cummins, K.W., and Berg, M.B. (2019).
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 Rhithrogena virilis Mayfly Spinner Pictures

I'm guessing this is Rhithrogena virilis based on resemblance to a similar specimen collected last year.

Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Lateral view of a Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Ruler view of a Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington The smallest ruler marks are 1/16".
Artistic view of a Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner from the South Fork Snoqualmie River in Washington
Male Rhithrogena virilis (Heptageniidae) Mayfly Spinner 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 23rd, 2018.


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Male Rhithrogena virilis Mayfly Spinner Pictures

Collection details
Location: South Fork Snoqualmie River, Washington
Date: June 16th, 2018
Added to site: June 23rd, 2018
Author: Troutnut
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