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.

My then-girlfriend, now-wife took this picture with my camera.

From Toughannock Creek in New York

Stream photos

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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (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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Stonefly Genus Kathroperla (Sallflies)

Genus Range

source

Specimens of the Stonefly Genus Kathroperla

1 Adult

Kathroperla perdita (Sallfly) Stonefly Adult

1 Picture

Kathroperla perdita (Chloroperlidae) (Sallfly) Stonefly Adult from Teepee Creek in Montana

Collected May 8, 2005 from Teepee Creek in Montana

Added by Bnewell on July 3, 2011

Collected May 8, 2005 from Teepee Creek in Montana and added by Bnewell on July 3, 2011

1 Nymph

Kathroperla perdita (Sallfly) Stonefly Nymph

1 Picture

Kathroperla perdita (Chloroperlidae) (Sallfly) Stonefly Nymph from the Flathead River-upper in Montana

This species is uncommonly collected except from wells. It is a hyporheic species living in the river gravels of river floodplains until it is ready to emerge.
The head shape is an important identifier.

Collected April 14, 2010 from the Flathead River-upper in Montana

Added by Bnewell on June 26, 2011

Collected April 14, 2010 from the Flathead River-upper in Montana and added by Bnewell on June 26, 2011