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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 Kogotus (Perlodidae) Stonefly Nymph from Mystery Creek #199 in Washington
This one pretty clearly keys to Kogotus, but it also looks fairly different from specimens I caught in the same creek about a month later in the year. With only one species of the genus known in Washington, I'm not sure about the answer to this ID.
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 Acroneuria lycorias (Golden Stones)

Where & when

Time of year : Early June through mid-July

This is a major species in the Midwest.

In 27 records from GBIF, adults of this species have mostly been collected during June (44%), May (22%), July (19%), and April (7%).

Species Range

Specimens of the Stonefly Species Acroneuria lycorias

1 Female Adult
2 Nymphs

Start a Discussion of Acroneuria lycorias

References

Stonefly Species Acroneuria lycorias (Golden Stones)

Taxonomy
Species Range
Resources
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