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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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Stonefly Species Agnetina flavescens (Golden Stones)

Where & when

In 6 records from GBIF, adults of this species have been collected during June (67%) and July (33%).

Species Range

Identification

To determine whether a specimen of Agnetina belongs to Agnetina flavescens, use the Key to Species of Agnetina Nymphs or Key to Species of Agnetina Adults.

Specimens of the Stonefly Species Agnetina flavescens

1 Nymph

Start a Discussion of Agnetina flavescens

Stonefly Species Agnetina flavescens (Golden Stones)

Taxonomy
Species Range
Resources
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