**Male Ephemerella dorothea infrequens (Pale Morning Dun) Mayfly Dun Pictures**

Mayflies

Caddisflies

Stoneflies

Classification

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

» Class Insecta (Insects)

» Order Ephemeroptera (Mayflies)

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

» Genus Ephemerella (Hendricksons, Sulphurs, PMDs)

» Species dorothea infrequens (Pale Morning Dun)

This dun was collected in proximity to this spinner.

This mayfly was collected from the Madison River on July 1st, 2019 and added to Troutnut.com on July 18th, 2019.

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Male Ephemerella dorothea infrequens (Pale Morning Dun) Mayfly Dun from the Madison River in Montana

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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.