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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 Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington
This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.
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.

Chris_3g has attached these 2 pictures to aid in identification. The message is below.
These weren't the only ones, and they weren't limited to this structure.  They were all over the place, and a lot of them were very close, if not in, the water.
Chris_3g
Posts: 59
Chris_3g on Jul 25, 2007July 25th, 2007, 4:35 pm EDT
Hey guys. I don't often pull my camera our of its zip-lock bag for much aside from fish and scenery, but this was just weird. I have never seen such a gathering of little centipede-looking critters, and I wouldn't even post them here except that all of this was happening so close to the water that there are probably a few extra happy fish swimming around this evening. Of course, I'm interested because it's likely I'm going to head back to this stream in the near future and wouldn't mind knowing what extra bits of food the fish might be feeding on in the evenings. Anyway, thought you guys might be interested and / or could tell me what the heck was going on. Thanks!

Chris.
Konchu
Konchu's profile picture
Site Editor
Indiana

Posts: 498
Konchu on Jul 25, 2007July 25th, 2007, 5:24 pm EDT
I have noticed these critters near and in water here in Indiana, too. If they're the same thing I've seen, they're a kind of millipede. Funny thing is, I've not noticed them in other years (and I regularly go out of my way to find stuff like this).

Not sure that fish, or *trout* (there is a distinction), would find them tasty. I know that some millipedes put off a disgusting scent that predators find revolting. At least I find it revolting when I step on one barefoot. Maybe someone else out there knows more (e.g., Gonzo or Taxon; of course they may not know more, but at least they'll give you a wrong answer with confidence--a nod to comments from a recent Drunella thread).

Disclaimer: I'm not really an entomologist, I just play one on troutnut.com. ;)
GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Jul 25, 2007July 25th, 2007, 5:53 pm EDT
...but at least they'll give you a wrong answer with confidence....

Hah! Darn right! (Or would that be darn wrong?) That reminds me of Shawn quoting the Strunk and White comments that if you don't know how to pronounce a word, at least say it loud; that way you won't compound ignorance with inaudibility! :)

Hey, Chris, don't pay any attention to Konchu's disclaimer. There may be times when he wishes he weren't an entomologist, but trust me, he is.
Wiflyfisher
Wiflyfisher's profile picture
Wisconsin

Posts: 622
Wiflyfisher on Jul 25, 2007July 25th, 2007, 7:46 pm EDT
That is probably Narceus americanus. (But who knows, tomorrow it may be a subspecies of something else.)

See: http://en.wikipedia.org/wiki/Narceus_americanus
Taxon
Taxon's profile picture
Site Editor
Plano, TX

Posts: 1311
Taxon on Jul 25, 2007July 25th, 2007, 9:00 pm EDT
Maybe someone else out there knows more (e.g., Gonzo or Taxon; of course they may not know more, but at least they'll give you a wrong answer with confidence


Oxidus gracilis !!!
Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

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