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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 Arctopsyche grandis (Great Gray Spotted Sedges)

Where & when

In 65 records from GBIF, adults of this species have mostly been collected during July (40%), June (28%), and August (20%).

In 73 records from GBIF, this species has been collected at elevations ranging from 1083 to 19701 ft, with an average (median) of 7142 ft.

Species Range

Specimens of the Caddisfly Species Arctopsyche grandis

2 Larvae

Start a Discussion of Arctopsyche grandis

Caddisfly Species Arctopsyche grandis (Great Gray Spotted Sedges)

Species Range
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