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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.

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 Limnephilus externus (Summer Flier Sedges)

Where & when

In 101 records from GBIF, adults of this species have mostly been collected during August (30%), September (28%), July (20%), October (13%), and June (8%).

In 70 records from GBIF, this species has been collected at elevations ranging from 3 to 22123 ft, with an average (median) of 1932 ft.

Species Range

Specimens of the Caddisfly Species Limnephilus externus

1 Adult
1 Male Adult
1 Larva

Start a Discussion of Limnephilus externus

Caddisfly Species Limnephilus externus (Summer Flier Sedges)

Species Range
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