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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 Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington
I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.
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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Troutnut.com User Riverratben (Ben Olson)

Troutnut.com User Riverratben (Ben Olson)

Real Name
Ben Olson
Location
Pueblo Colorado
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Biography & Thoughts
1. Don't fish for food its cheaper to go to the grocery store than it is to buy all the gear you will need to fish.
2. If you keep fish, eat them don't let them get freezer burn!
3. Support the businesses who are willing to teach you and answer your questions, don't buy gear from someone who has "it" in stock but is not willing to give you the time of day.

I deal with this every day it drives me crazy! Hope you agree!
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Apr 20, 2007
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