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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.

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 Genus Isogenoides (Springflies)

Isogenoides olivaceus is a common species.
Genus Range

Specimens of the Stonefly Genus Isogenoides

1 Nymph

Start a Discussion of Isogenoides

Stonefly Genus Isogenoides (Springflies)

Taxonomy
6 species (Isogenoides colubrinus, Isogenoides elongatus, Isogenoides frontalis, Isogenoides krumholzi, Isogenoides varians, and Isogenoides zionensis) aren't included.
Genus Range
Common Name
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