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Female Siphlonurus autumnalis (Gray Drake) Mayfly Spinner Pictures

 I found this specimen and saw a few more of its kind during midday on a small, steep, rocky creek fairly high in the Cascades, different from the previously reported habitats of its species.

This mayfly was collected from Mystery Creek #249 on September 29th, 2020 and added to Troutnut.com on November 10th, 2020.

Appears to be Siphlonurus autumnalis  Female Siphlonurus autumnalis (Gray Drake) Mayfly Spinner from Mystery Creek #249 in Washington
Appears to be Siphlonurus autumnalis

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