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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.

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.

Female Stenonema modestum (Cream Cahill) Mayfly Spinner Pictures

This one was collected in in association with this male. It looks quite different, but that's often the case between spinner genders.

This mayfly was collected from unknown in Wisconsin on August 5th, 2004 and added to Troutnut.com by Troutnut on January 19th, 2006.

Discussions of this Spinner

Maccaffertium
Posted by GONZO on Oct 28, 2008
Last reply on Oct 28, 2008 by GONZO
This female has abdominal markings (spiracular dots and lines on posterior margins) and cross veins that are not crowded in the bulla region of the wing. This seems consistent with some M. modestum, and I'm pretty sure that this female is the same species as the male collected on the same day (#295).

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Female Stenonema modestum (Cream Cahill) Mayfly Spinner Pictures

Collection details
Location: unknown, Wisconsin
Date: August 5th, 2004
Added to site: January 19th, 2006
Author: Troutnut
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