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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 Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
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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TNEAL
GRAYLING. MICHIGAN

Posts: 278
TNEAL on Jul 16, 2010July 16th, 2010, 10:14 am EDT
This post reminds me of when I first worked in a fly shop many years ago. We would sit tying in a spot visible through the front window. When the Hex hatch started, we received myriad requests for custom tying accompanied nearly always with the admonition "please don't show this pattern to anyone else." I can only assume all these guys were catching nice fish on their favorite Hex pattern. Which of these is the "best fly" for that hatch?
Jesse
Jesse's profile picture
Posts: 378
Jesse on Jul 16, 2010July 16th, 2010, 2:08 pm EDT
Now i never said the bugger was my favorite fly to throw but its the one fly that can ALWAYS get the job done. It might be a little cliche to say but you simple can't have a complete box without it no matter what the species your fishing for, especially trout!
Most of us fish our whole lives..not knowing its not the fish that we are after.
http://www.filingoflyfishing.com
Jmd123
Jmd123's profile picture
Oscoda, MI

Posts: 2474
Jmd123 on Jul 16, 2010July 16th, 2010, 5:01 pm EDT
You know, folks, in an era when there are literally tens of thousands of fly patterns, if not more, available to the fly fisherman, plus the fact that there are at least several million (if not more) fly fisherman (including fisherWOMEN) in this world, this question is really POINTLESS...

Gonzo said it best: it's the one at the end of your line that you're catching fish on right now. SO BE IT!

Jonathon
No matter how big the one you just caught is, there's always a bigger one out there somewhere...
Windknot79
on a stream

Posts: 16
Windknot79 on Jul 17, 2010July 17th, 2010, 7:13 am EDT
the best trout fly is the one u catch the most with.so many facters involed.bugs dropping on the water it chould be a dry nothing showing its a nnymph.
vinlflyfish this is a great question and interesting to see the diffrent anwsers.
well my best trout fly is a nymph tied with turky tail in a pheasent tail pattern.its a killer for me and the frist fly I start with un less they are rising.

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