**Female Siphlonurus occidentalis (Gray Drake) Mayfly Dun Pictures**

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Siphlonuridae (Gray Drakes)

» Genus Siphlonurus (Gray Drakes)

» Species occidentalis (Gray Drake)

I caught this specimen two days' walk from my macro lenses, but I don't think I have a dun of this species yet, so I took the best photos I could with my iPhone.

This mayfly was collected from Island Lake on August 30th, 2020 and added to Troutnut.com on September 18th, 2020.

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Female Siphlonurus occidentalis (Gray Drake) Mayfly Dun from Island Lake in Wyoming

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Female Siphlonurus occidentalis (Gray Drake) Mayfly Dun Pictures

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**Female Siphlonurus occidentalis (Gray Drake) Mayfly Dun Pictures**