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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 Megarcys (Springflies)

Where & when

In 2 records from GBIF, adults of this genus have been collected during May (100%).

Genus Range

Specimens of the Stonefly Genus Megarcys

1 Adult

Start a Discussion of Megarcys

Stonefly Genus Megarcys (Springflies)

Genus Range
Common Name
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