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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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Wbranch has attached this picture. The message is below.
Wbranch
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Dec 4, 2015December 4th, 2015, 3:50 am EST
This is a picture of my Montana partner setting the hook on a very large brown trout. His brother just happened to be in the right place at the right time to get this stunning photograph. If you look downstream and slightly to the left you will see another fish boiling.
Catskill fly fisher for fifty-five years.
PaulRoberts
PaulRoberts's profile picture
Colorado

Posts: 1776
PaulRoberts on Dec 4, 2015December 4th, 2015, 5:55 am EST
Very cool shot, Matt!

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