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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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Wbranch has attached these 5 pictures to this report. The message is below.

Report at a Glance

General RegionBetween Balls Eddy & Route 191 bridge
Specific LocationUndisclosed
Dates FishedMay 29 - 30
Time of Day8:00 - 1:00 & 4:00 - 8:00
Fish CaughtWild browns and rainbows
Conditions & HatchesOvercast, zero wind, flow between 420 & 650 cfs due to T-storms. March Browns, Olives, Caddis, Sulfurs.

Details and Discussion

Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Jun 1, 2017June 1st, 2017, 4:38 pm EDT
A wonderful two days of cooperative rising wild trout. Rose about sixteen trout. Hooked a dozen and landed nine. The browns were all 16" - 20" and the rainbows 15" - 16". No pressure. Only myself and my best friend of 55 years on over 1/4 mile or river.
Catskill fly fisher for fifty-five years.
David82nd's profile picture
Upstate,New York

Posts: 63
David82nd on Jun 1, 2017June 1st, 2017, 11:10 pm EDT
That's a great day , beautiful fish. Looks like you did you're homework.
Partsman's profile picture
bancroft michigan

Posts: 321
Partsman on Jun 5, 2017June 5th, 2017, 2:11 pm EDT
Beautiful pics, and a good looking outfit!
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Jun 5, 2017June 5th, 2017, 3:12 pm EDT
I really love the set-up; Orvis Helios 2 9' #4 Tip flex, 4 pcs. with a Lamson Speedster reel and an Orvis HD WF#4 line. I can throw a 15' 5X leader and a #18 fly 50' with ease.
Catskill fly fisher for fifty-five years.

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