**Male Drunella coloradensis (Small Western Green Drake) Mayfly Spinner Pictures**

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

» Family Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs)

» Genus Drunella (Blue-Winged Olives)

» Species coloradensis (Small Western Green Drake)

This spinner molted from this dun, or possibly one other dun I had in the same container that looked just like it.

This mayfly was collected from Mystery Creek #199 on July 28th, 2019 and added to Troutnut.com on July 30th, 2019.

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Male Drunella coloradensis (Small Western Green Drake) Mayfly Spinner from Mystery Creek #199 in Washington

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Jargon Defined:

Dun: Mayflies have two adult stages. They first emerge from the water as duns (scientifically known as the subimago stage). They then molt into the spinner (imago) stage, in which they mate and die. Sometimes the word "dun" is confusingly used to refer to a brownish gray color in fly tying materials.

Spinner: There are two winged stages of adult mayflies. They emerge from the water as duns, molt on land (usually) into their fully mature stage, spinners. As spinners, they mate, lay eggs, and die.