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.

The trees were leafing out and the trout were rising on this productive Wisconsin stream

From the Namekagon River in Wisconsin

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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Pteronarcys proteus (Salmonfly) Stonefly Nymph Pictures

Pteronarcys proteus (Pteronarcyidae) (Salmonfly) Stonefly Nymph from Mongaup Creek in New York

Dorsal view of a Pteronarcys proteus (Pteronarcyidae) (Salmonfly) Stonefly Nymph from Mongaup Creek in New York

Ventral view of a Pteronarcys proteus (Pteronarcyidae) (Salmonfly) Stonefly Nymph from Mongaup Creek in New York

Ruler view of a Pteronarcys proteus (Pteronarcyidae) (Salmonfly) Stonefly Nymph from Mongaup Creek in New York The smallest ruler marks are 1 mm.

Artistic view of a Pteronarcys proteus (Pteronarcyidae) (Salmonfly) Stonefly Nymph from Mongaup Creek in New York

This stonefly was collected from Mongaup Creek in New York on April 19th, 2006 and added to Troutnut.com by Troutnut on April 21st, 2006.

Discussions of this Nymph

Correction

Posted by GONZO on Oct 28, 2008

Last reply on Oct 28, 2008 by GONZO

Probably proteus--my bad.

Probably Pteronarcys biloba

2 replies

Posted by GONZO on Oct 4, 2006

Last reply on Oct 4, 2006 by GONZO

Everything seems consistent with P. biloba, the "Knobbed Salmonfly." Unlike dorsata, it is usually found in small streams and headwaters where it is a real mouthful for the little trout. Typical salmonfly nymph ties tend to be likewise, so I usually choose to imitate the younger, smaller generations of nymphs.

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