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Female Siphlonurus occidentalis (Gray Drake) Mayfly Spinner Pictures



 This specimen was identified by association with this male.

This mayfly was collected from the Henry's Fork of the Snake River on July 31st, 2020 and added to Troutnut.com on August 16th, 2020.

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

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