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Blue-winged Olives

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.

Male Heptagenia adaequata Mayfly Spinner Pictures

This mayfly was collected from the Columbia River in Washington on July 22nd, 2012 and added to Troutnut.com by Bnewell on July 26th, 2012.

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