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Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner Pictures



This mayfly was collected from the Henry's Fork of the Snake River on July 31st, 2020 and added to Troutnut.com on August 17th, 2020.

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Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho
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Male Siphlonurus occidentalis (Gray Drake) Mayfly Spinner from the Henry's Fork of the Snake River in Idaho

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