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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.

Cinygmula (Dark Red Quills) Mayfly Nymph Pictures

This one doesn't have the protruding mouthparts typical of Cinygmula, but I think it's just an oddball individual.

This mayfly was collected from Swauk Creek in Washington on June 13th, 2022 and added to Troutnut.com by Troutnut on June 14th, 2022.

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