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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.

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
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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Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Pictures

This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.

Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Dorsal view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Lateral view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Ventral view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington
Ruler view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington The smallest ruler marks are 1 mm.
Ventral view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington

This stonefly was collected from the Yakima River in Washington on May 27th, 2023 and added to Troutnut.com by Troutnut on June 10th, 2023.


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Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Pictures

Collection details
Location: Yakima River, Washington
Date: May 27th, 2023
Added to site: June 10th, 2023
Author: Troutnut
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