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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

Dorsal view of a Epeorus albertae (Heptageniidae) (Pink Lady) Mayfly Nymph from the East Fork Issaquah Creek in Washington
This specimen keys to the Epeorus albertae group of species. Of the five species in that group, the two known in Washington state are Epeorus albertae and Epeorus dulciana. Of the two, albertae has been collected in vastly more locations in Washington than dulciana, suggesting it is far more common. On that basis alone I'm tentatively putting this nymph in albertae, with the large caveat that there's no real information to rule out dulciana.
27" brown trout, my largest ever. It was the sub-dominant fish in its pool. After this, I hooked the bigger one, but I couldn't land it.
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Drunella doddsii (Western Green Drake) Mayfly Nymph Pictures

Dorsal view of a Drunella doddsii (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Gallatin River in Montana
Ventral view of a Drunella doddsii (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Gallatin River in Montana
Ruler view of a Drunella doddsii (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Gallatin River in Montana The smallest ruler marks are 1 mm.
Lateral view of a Drunella doddsii (Ephemerellidae) (Western Green Drake) Mayfly Nymph from the Gallatin River in Montana

This mayfly was collected from the Gallatin River in Montana on July 2nd, 2019 and added to Troutnut.com by Troutnut on July 18th, 2019.


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Drunella doddsii (Western Green Drake) Mayfly Nymph Pictures

Collection details
Location: Gallatin River, Montana
Date: July 2nd, 2019
Added to site: July 18th, 2019
Author: Troutnut
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