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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.

Female Stenonema vicarium (March Brown) Mayfly Spinner Pictures

This mayfly was collected from the Bois Brule River in Wisconsin on June 1st, 2005 and added to Troutnut.com by Troutnut on May 24th, 2006.

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