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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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Sweltsa (Sallfly) Stonefly Nymph Pictures

This species was fairly abundant in a February sample of the upper Yakima.

Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Ventral view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Ruler view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington The smallest ruler marks are 1 mm.
Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Colors artificially enhanced to show the pattern of setae on the tails.

Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington
Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This stonefly was collected from the Yakima River in Washington on February 18th, 2023 and added to Troutnut.com by Troutnut on February 21st, 2023.


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Sweltsa (Sallfly) Stonefly Nymph Pictures

Collection details
Location: Yakima River, Washington
Date: February 18th, 2023
Added to site: February 21st, 2023
Author: Troutnut
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