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Male Tricorythodes (Tricos) Mayfly Spinner Pictures

This mayfly was collected from the Big Hole River on August 11th, 2018 and added to on June 11th, 2019.

Every mark is 1/16 inch.  Male Tricorythodes (Tricos) Mayfly Spinner from the Big Hole River in Montana
Every mark is 1/16 inch.

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