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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.

Dorsal view of a Setvena wahkeena (Perlodidae) (Wahkeena Springfly) Stonefly Nymph from Mystery Creek #199 in Washington
As far as I can tell, this species has only previously been reported from one site in Oregon along the Columbia gorge. However, the key characteristics are fairly unmistakable in all except for one minor detail:
— 4 small yellow spots on frons visible in photos
— Narrow occipital spinule row curves forward (but doesn’t quite meet on stem of ecdysial suture, as it's supposed to in this species)
— Short spinules on anterior margin of front legs
— Short rposterior row of blunt spinules on abdominal tergae, rather than elongated spinules dorsally
I caught several of these mature nymphs in the fishless, tiny headwaters of a creek high in the Wenatchee Mountains.
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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Rhyacophila fuscula (Green Sedge) Caddisfly Larva Pictures

I collected this larva and several like it from the same stream and on the same day as this pupa. I suspect they're the same species.

Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Lateral view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Dorsal view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Ventral view of a Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin
Rhyacophila fuscula (Rhyacophilidae) (Green Sedge) Caddisfly Larva from the Long Lake Branch of the White River in Wisconsin

This caddisfly was collected from the Long Lake Branch of the White River in Wisconsin on June 5th, 2005 and added to Troutnut.com by Troutnut on May 25th, 2006.

Discussions of this Larva

Identification
4 replies
Posted by Litobrancha on Sep 5, 2006
Last reply on Jul 30, 2019 by Troutnut
Looks like Rhyacophila fuscula. Wonderful bug.

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Rhyacophila fuscula (Green Sedge) Caddisfly Larva Pictures

Collection details
Location: Long Lake Branch of the White River, Wisconsin
Date: June 5th, 2005
Added to site: May 25th, 2006
Author: Troutnut
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