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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.

View from atop the permafrost slump From the Selawik River in Alaska

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Sweltsa (Sallfly) Stonefly NymphSweltsa (Sallfly) Stonefly Nymph
Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
This species was fairly abundant in a February sample of the upper Yakima.
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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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Closeup insects by Bnewell from Flathead Lake in Montana

Female Callibaetis (Speckled Dun) Mayfly Dun
1 Picture
Female Callibaetis (Baetidae) (Speckled Dun) Mayfly Dun from Flathead Lake in Montana
Added by Bnewell on July 14, 2011
Collected May 24, 2005 from Flathead Lake in Montana and added by Bnewell on July 14, 2011
Female Callibaetis (Speckled Dun) Mayfly Dun
2 Pictures
Female Callibaetis (Baetidae) (Speckled Dun) Mayfly Dun from Flathead Lake in Montana
Probably Callibaetis ferrugineus.
Added by Bnewell on June 27, 2011
Collected May 24, 2005 from Flathead Lake in Montana and added by Bnewell on June 27, 2011

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