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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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Caddisfly Species Pycnopsyche lepida (Great Autumn Brown Sedges)

Where & when

This is the most abundant midwestern species of Pycnopsyche. It may share streams with Pycnopsyche guttifer. It can be very abundant.

In 71 records from GBIF, adults of this species have mostly been collected during August (31%), September (28%), July (24%), and October (10%).

In 26 records from GBIF, this species has been collected at elevations ranging from 177 to 9186 ft, with an average (median) of 2822 ft.

Species Range

Start a Discussion of Pycnopsyche lepida

References

Caddisfly Species Pycnopsyche lepida (Great Autumn Brown Sedges)

Taxonomy
Species Range
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