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Salmonflies
Pteronarcys californica

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

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.

Stenonema vicarium (March Brown) Mayfly Nymph Pictures

I photographed this Maccaffertium vicarium nymph shortly after it molted to a new instar in my holding container. Many nymphs take on drastically different coloration immediately after molting, and this species is no exception.

This mayfly was collected from the Beaverkill River in New York on April 19th, 2006 and added to Troutnut.com by Troutnut on April 21st, 2006.


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Stenonema vicarium (March Brown) Mayfly Nymph Pictures

Collection details
Location: Beaverkill River, New York
Date: April 19th, 2006
Added to site: April 21st, 2006
Author: Troutnut
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