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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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Dorsal view of a Baetis (Baetidae) (Blue-Winged Olive) Mayfly Nymph from Mongaup Creek in New York
Sare
Posts: 2
Sare on Mar 23, 2016March 23rd, 2016, 3:48 pm EDT
I may be nieve but when it comes to trailing shucks I use what ever color poly or antron that's handy.
The Trout don't seem to care.
Martinlf
Martinlf's profile picture
Moderator
Palmyra PA

Posts: 3047
Martinlf on Mar 23, 2016March 23rd, 2016, 5:29 pm EDT
Ah, how do you know? Some trout may care, and some may not. A scientific poll is what is needed here, with specific questions that will allow each trout to give his or her opinion. Different trout from different streams would need to be polled. The results might be surprising.
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell

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