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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Case view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
It's only barely visible in one of my pictures, but I confirmed under the microscope that this one has a prosternal horn and the antennae are mid-way between the eyes and front of the head capsule.

I'm calling this one Pycnopsyche, but it's a bit perplexing. It seems to key definitively to at least Couplet 8 of the Key to Genera of Limnephilidae Larvae. That narrows it down to three genera, and the case seems wrong for the other two. The case looks right for Pycnopsyche, and it fits one of the key characteristics: "Abdominal sternum II without chloride epithelium and abdominal segment IX with only single seta on each side of dorsal sclerite." However, the characteristic "metanotal sa1 sclerites not fused, although often contiguous" does not seem to fit well. Those sclerites sure look fused to me, although I can make out a thin groove in the touching halves in the anterior half under the microscope. Perhaps this is a regional variation.

The only species of Pycnopsyche documented in Washington state is Pycnopsyche guttifera, and the colors and markings around the head of this specimen seem to match very well a specimen of that species from Massachusetts on Bugguide. So I am placing it in that species for now.

Whatever species this is, I photographed another specimen of seemingly the same species from the same spot a couple months later.
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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North Carolina

Posts: 36
Bobbyg on May 28, 2010May 28th, 2010, 7:42 am EDT
I'm going to be out in Montana visiting family from August 15th to the 22nd. This is about a month earlier than my normal yearly trip.
Other than hoppers and other terrestials can you guys suggest some flies I might want to have handy?

Tentatively I'll be fishing the Sun, Missouri, Rock Creek, and hopefully a couple of small streams.

Thanks for any help!!

"Many men go fishing all of their lives without knowing it is not fish they are after."

- Henry David Thoreau
CaseyP's profile picture
Arlington, VA/ Mercersburg, PA

Posts: 653
CaseyP on May 28, 2010May 28th, 2010, 10:40 am EDT
tricos 18-22 or so, duns and spinners
"You can observe a lot by watching." Yogi Berra
JOHNW's profile picture
Chambersburg, PA

Posts: 452
JOHNW on May 28, 2010May 28th, 2010, 11:28 am EDT
For the MO'
#16-18 parachute ants
#16-20 grifiths gnats or bivisibles
#18-20 Lightning bugs
#16-18 spent tan caddis
and if you must tricos

The big draw is in fact the tricos but they hit the water in such large numbers that the fish frequently feed in big gulps as opposed to selectively feeding on single or double spinners. A guide friend put me on to the trick of fishing something a little bigger and more visible. WHile I was a little reluctant at first I figured the guy spends 200+ days on the river he probably knows a thing or two. Unbelievably ;) it worked and I nailed 3 slurpers in short order.

I can't really speak to the others but I have heard the sun is a good attractor river.
Hope that helps.
"old habits are hard to kill once you have gray in your beard" -Old Red Barn
Motrout's profile picture
Posts: 319
Motrout on May 28, 2010May 28th, 2010, 2:43 pm EDT
If you're headed up to Montana, have plenty of attractor patterns. There is no substitute up on the Montana freestones for stimulators and Ugly Radimus. Add some Royal Wullfs, Elk Hair Caddis, Stonefly Nymphs, and Adams, and you've got everything you need for the freestoners most of the time. The fish just aren't that selective in the faster moving rivers up there- you have to match the hatch down in the Missouri quite a bit more though. The real technical streams like the MO aren't as enjoyable in my humble opinion-the freestoners are where it's at. Rock Creek is awesome, and while you are in that area, I'd hit the Blackfoot and Bitteroot as well.

And don't forget to fish a few small, unknown feeder creeks-I know I enjoy that more than anything else. If you can find a couple deep pools on any little mountain creek, you can catch brookies and cutthroat in complete solitude.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
Vinlflyfish's profile picture
northern cambria

Posts: 42
Vinlflyfish on Jun 5, 2010June 5th, 2010, 1:13 pm EDT
do u no any for the north east
trout; a mans best friend

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