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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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Crepuscular
Crepuscular's profile picture
Boiling Springs, PA

Posts: 920
Crepuscular on Jul 2, 2013July 2nd, 2013, 7:14 am EDT
Sorry for the crappy photos all I had was my phone

Collected 7/2/2013.
Dauphin County PA Susquehanna River
23mm
Female H. bilineata I guess, I don't recall ever seeing one before.




Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Jul 4, 2013July 4th, 2013, 4:57 am EDT
Wow! Cool.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Jul 10, 2013July 10th, 2013, 11:23 pm EDT
Looks like bilineata to me too, Eric. Spieth documented both the unique tergal markings and the black coloration in his '41 paper. The variability in this genus never ceases to amaze me.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman

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