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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 Grammotaulius betteni (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This is a striking caddis larva with an interesting color pattern on the head. Here are some characteristics I was able to see under the microscope, but could not easily expose for a picture:
- The prosternal horn is present.
- The mandible is clearly toothed, not formed into a uniform scraper blade.
- The seems to be only 2 major setae on the ventral edge of the hind femur.
- Chloride epithelia seem to be absent from the dorsal side of any abdominal segments.
Based on these characteristics and the ones more easily visible from the pictures, this seems to be Grammotaulius. The key's description of the case is spot-on: "Case cylindrical, made of longitudinally arranged sedge or similar leaves," as is the description of the markings on the head, "Dorsum of head light brownish yellow with numerous discrete, small, dark spots." The spot pattern on the head is a very good match to figure 19.312 of Merritt R.W., Cummins, K.W., and Berg, M.B. (2019). The species ID is based on Grammotaulius betteni being the only species of this genus known in Washington state.
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 Mar 16, 2011March 16th, 2011, 9:00 am EDT
As the dwindling remains of winter’s white wonderland slowly succumbs to the spring sun’s glare, rejuvenation swells into the watery habitat, and both flora and fauna emerge, once again, from hibernation’s hiding place. The mind and heart of the fly fisherman is uplifted on the new season, with warm felt expectation of tomorrow’s miracles, as they unfold into the future of day’s past memories. Season’s past will once again be reshaped, as the additions of days to come will be collected and stored as fodder, for the distant winter of yet to come. Picking up where we last left off, new experiences will meld with old, expanding and enriching our knowledge and self awareness. A renewed eye in curiosity may result in the better understanding of the winged forms with which we so desire to emulate at the vise, and increase in expectation nature’s beauty brought to hand. Tying techniques, presentation, equipment repair or replacement, and changes to the tried and true status quo, may emerge into new found wonder. That oh so familiar river, stream or creek, may just reveal a new secret if we grasp the season’s burgeoning potential and carry it forward onto every next cast. Not unlike the slow unfolding petals of the flower’s march to bloom, spring offers us the renewed potential to escape our shackles anew. We are all smitten with life’s uncertainties as we traverse its twists and turns, but with each emerging spring, may the fisherman in us bloom.
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."
Motrout
Motrout's profile picture
Posts: 319
Motrout on Mar 16, 2011March 16th, 2011, 12:43 pm EDT
I enjoyed your post a lot- very well written.

Spring has sprung here in my neck of the woods now. At least kind of... Sunday night we got 3" of wet snow, but today the temperature got up to 70 and tommorow it's supposed to get near 80 degrees. These crazy temperature swings must have gotten the fish a little confused-and anyway all the streams are really high with the sudden snow-melt. Still, this is about my favorite time of the year, and it's only gonna get better.
"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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