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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

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.

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington
This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.
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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Caddisfly Species Rhyacophila fuscula (Green Sedges)

This is the most abundant species of Rhyacophila in much of the East, and every stage can be important to trout. The drifting larvae are important in early Spring, and the emergers and egg-laying adults become important in late Spring and early Summer.

Where & when

Time of year : Mid-May to June

In 80 records from GBIF, adults of this species have mostly been collected during June (29%), July (29%), August (16%), May (15%), and September (6%).

In 51 records from GBIF, this species has been collected at elevations ranging from 85 to 4921 ft, with an average (median) of 1901 ft.

Species Range

Specimens of the Caddisfly Species Rhyacophila fuscula

2 Larvae

Start a Discussion of Rhyacophila fuscula


Caddisfly Species Rhyacophila fuscula (Green Sedges)

Species Range
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