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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.

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> Swauk Creek

Closeup insects by Troutnut from Swauk Creek in Washington

Doroneuria baumanni (Golden Stone) Stonefly Nymph
I'm not aware of any way to tell the two species of Doroneuria apart as nymphs, so this one is classified to species based on location alone. Doroneuria baumanni is found in the Cascades and in Washington, and the other species is not known here yet.
Cinygmula (Dark Red Quills) Mayfly Nymph
This one doesn't have the protruding mouthparts typical of Cinygmula, but I think it's just an oddball individual.
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