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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.

Female Baetis (Blue-Winged Olive) Mayfly Dun Pictures

I'm guessing this specimen is in the genus Acerpenna because of the very sharp costal process on her hind wing. I'm guessing pygmaea because it is the most common species.

Editor note: Not Acerpenna. This is most likely Baetis. See comments on this male specimen for rationale. Also compare with the female specimen associated with it.

Lateral view of a Female Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from the Bois Brule River in Wisconsin
Female Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from the Bois Brule River in Wisconsin
Dorsal view of a Female Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from the Bois Brule River in Wisconsin
Ventral view of a Female Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from the Bois Brule River in Wisconsin

This mayfly was collected from the Bois Brule River in Wisconsin on July 1st, 2005 and added to Troutnut.com by Troutnut on April 22nd, 2006.

Discussions of this Dun

?
Posted by Flytyer0423 on Aug 20, 2009
Last reply on Aug 20, 2009 by Flytyer0423
when the one wing is like the one in the picture thats called a crippled mayfly?
ID
4 replies
Posted by Taxon on Jul 1, 2006
Last reply on Sep 21, 2006 by Troutnut
Jason-

My guess would be Baetis brunneicolor.

Roger

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References

Female Baetis (Blue-Winged Olive) Mayfly Dun Pictures

Collection details
Location: Bois Brule River, Wisconsin
Date: July 1st, 2005
Added to site: April 22nd, 2006
Author: Troutnut
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