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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
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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Posts: 24
Isidro on Mar 11, 2008March 11th, 2008, 10:50 pm EDT
In this case, I'm completely sure about the genus. In Iberian Peninsula are cited three Epeorus species: E. alpicola, E. sylvicola and E. torrentium. Which one can be this insect?

Flying in small groups above a road, in high mountain, Benasque, Aragon, Spain, in the Pyrenees mountains, at 1400 meters high, in a zone with quick river of clean and cool water, with rocks and stones. All surrounded by pine (Pinus sylvestris) forest. Wingspan: about 25-30 mm.
Pleasant Gap, PA

Posts: 1197
Shawnny3 on Mar 12, 2008March 12th, 2008, 12:15 pm EDT
I can't help you out, but I did want to mention how beautiful that first picture is. What wonderful color you captured.

Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
Posts: 24
Isidro on Mar 16, 2008March 16th, 2008, 6:24 am EDT
I give it as impossible..??? :-( :-( :-(

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