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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.

Lateral view of a Female Sweltsa borealis (Chloroperlidae) (Boreal Sallfly) Stonefly Adult from Harris Creek in Washington
I was not fishing, but happened to be at an unrelated social event on a hill above this tiny creek (which I never even saw) when this stonefly flew by me. I assume it came from there. Some key characteristics are tricky to follow, but process of elimination ultimately led me to Sweltsa borealis. It is reassuringly similar to this specimen posted by Bob Newell years ago. It is also so strikingly similar to this nymph from the same river system that I'm comfortable identifying that nymph from this adult. I was especially pleased with the closeup photo of four mites parasitizing this one.
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.
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CaseyP has attached this picture to aid in identification. The message is below.
CaseyP
CaseyP's profile picture
Arlington, VA/ Mercersburg, PA

Posts: 653
CaseyP on Sep 12, 2017September 12th, 2017, 4:46 pm EDT
went out to montana in august and found this on the car window. new phone actually took a really swell picture of it. no idea at this point where exactly, but probably near the Ruby River or the Madison.
"You can observe a lot by watching." Yogi Berra
Millcreek
Healdsburg, CA

Posts: 344
Millcreek on Sep 12, 2017September 12th, 2017, 5:15 pm EDT
Casey - Might be a male Callibaetis imago. Take a look at this Bugguide photo.
http://bugguide.net/node/view/1298833/bgimage
"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein
CaseyP
CaseyP's profile picture
Arlington, VA/ Mercersburg, PA

Posts: 653
CaseyP on Sep 18, 2017September 18th, 2017, 11:12 am EDT
thanks, Millcreek! the geographic location and the resemblance to the bug in the link would make me say Callibaetis.interesting color variation.
"You can observe a lot by watching." Yogi Berra
Creno
Grants Pass, OR

Posts: 302
Creno on Sep 19, 2017September 19th, 2017, 10:49 am EDT
If you have your settings right on your phone the phone may have placed a latitude/longitude on your photo. You can enter that into most mapping programs and it will show you where you were at.

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