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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
Baetis

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.

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.
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.

Falsifly
Falsifly's profile picture
Hayward, WI.

Posts: 660
Falsifly on Oct 31, 2011October 31st, 2011, 12:09 pm EDT
As much as we fly fishers abhor mosquitoes could this experiment create a monster with unintended consequences, or is it a step in the right direction?

Genetically Engineered Mosquitoes


Falsifly
When asked what I just caught that monster on I showed him. He put on his magnifiers and said, "I can't believe they can see that."
Adirman
Adirman's profile picture
Monticello, NY

Posts: 479
Adirman on Oct 31, 2011October 31st, 2011, 1:25 pm EDT
Probably shouldn't mess w/ Mother Nature IMHO. Sure, its nice to not get bit up by swarms of 'em but if the population is severely impacted, no tellin its effect on other levels of the food chain.
Entoman
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Nov 6, 2011November 6th, 2011, 5:45 am EST
When one tugs at a single thing in nature, he finds it attached to the rest of the world.
- John Muir
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman
Jesse
Jesse's profile picture
Posts: 378
Jesse on Nov 8, 2011November 8th, 2011, 4:38 am EST
Perfectly said, and the thought of humans trying to play the role of God makes me sick...
Most of us fish our whole lives..not knowing its not the fish that we are after.
http://www.filingoflyfishing.com

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