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.

A small, old rock wing dam has created an excellent riffle and pool in this classic trout stream.

Stream photos

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Epeorus albertae (Pink Lady) Mayfly Nymph Epeorus albertae (Pink Lady) Mayfly Nymph

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.

5 Recently Added Photos

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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Male Epeorus (Little Maryatt) Mayfly Spinner Pictures

This spinner and hundreds of others like it were dancing over the road through a very narrow valley carved by a tiny, steep tributary of the trout stream I was fishing. I got strange looks from a few passers-by, standing around on the road with a butterfly net...

Male Epeorus (Heptageniidae) (Little Maryatt) Mayfly Spinner from Unnamed trib of Factory Brook along 42a in New York

Dorsal view of a Male Epeorus (Heptageniidae) (Little Maryatt) Mayfly Spinner from Unnamed trib of Factory Brook along 42a in New York

Lateral view of a Male Epeorus (Heptageniidae) (Little Maryatt) Mayfly Spinner from Unnamed trib of Factory Brook along 42a in New York

Artistic view of a Male Epeorus (Heptageniidae) (Little Maryatt) Mayfly Spinner from Unnamed trib of Factory Brook along 42a in New York

Ruler view of a Male Epeorus (Heptageniidae) (Little Maryatt) Mayfly Spinner from Unnamed trib of Factory Brook along 42a in New York The smallest ruler marks are 1 mm.

Ventral view of a Male Epeorus (Heptageniidae) (Little Maryatt) Mayfly Spinner from Unnamed trib of Factory Brook along 42a in New York

This mayfly was collected from Unnamed trib of Factory Brook along 42a in New York on May 9th, 2007 and added to Troutnut.com by Troutnut on May 18th, 2007.

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