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Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin
Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Dorsal view of a Setvena wahkeena (Perlodidae) (Wahkeena Springfly) Stonefly Nymph from Mystery Creek #199 in Washington
As far as I can tell, this species has only previously been reported from one site in Oregon along the Columbia gorge. However, the key characteristics are fairly unmistakable in all except for one minor detail:
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.
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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Report at a Glance

General RegionMissouri Ozarks
Specific LocationCurrent River
Dates Fished9/9,9/10
Time of Dayall day
Fish Caughtbrowns, rainbows
Conditions & HatchesAir temps ranging from 50 to 75ish
Mostly cloudy with some rain
water temperature 57-59
Hatches: A few tricos, olives, and caddis, nothing much though.

Details and Discussion

Motrout
Motrout's profile picture
Posts: 319
Motrout on Sep 10, 2011September 10th, 2011, 6:39 pm EDT
This has been a tough summer for trout fishing in the Ozarks! Lots of very hot weather has not been kind to our streams. But at the beginning of this week, we literally went pretty much all in one day into a fall like weather pattern, highs in the low to mid 70s, lows in the 50s and a few nights even in the upper 40s. I don't know if it can last, but I sure hope it does. I love it and so do the trout! I got down there yesterday and set up camp on my favorite stretch of the Current yesterday about 10 miles down from the headwaters (about the lower end of the really excellent trout water) and the fishing was wonderful, a real refreshing thing after this summer. There were some hatches, tricos and olives early morning, caddis in the evening, but not all that many bugs coming off. The fish didn't care though and were willing to eat attractor dries. The good old Ausable Wulff was a great producer and kept the smaller brown trout happy throughout the trip. The weather was cool and cloudy with some rain, so pretty much perfect dry fly conditions all day long both days. I also tossed some streamers, as the conditions were great for that also. I caught a couple slightly larger browns on a sculpin pattern, ranging up to 15 inches or so. No fish of any size by Current River standards though. Anyway, it was a great trip in one of my favorite areas. I never needed to use an nymph indicator rig a single time, which was nice for a change.

Adding to the weather seeming like fall, the leaves are even taking on some color.But that is just due to drought, it is definitely too early for them to be really changing colors for the fall. Won't be long till I'll be hitting the Current hard for its fall olive hatches as well as the best streamer fishing of the year...Last October/November we were in a drought, not many of the cloudy, rainy days that are good for baetis. Here is to hoping this year will be a little different.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
http://fishingintheozarks.blogspot.com/

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