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.

The Middle Fork of the Koyukuk River in Alaska

Stream photos

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Doroneuria baumanni (Golden Stone) Stonefly Nymph Doroneuria baumanni (Golden Stone) Stonefly Nymph

Dorsal view of a Doroneuria baumanni (Perlidae) (Golden Stone) Stonefly Nymph from Sears Creek in Washington

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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.

Troutnut is a project started in 2003 by salmonid ecologist Jason "Troutnut" Neuswanger to help anglers and fly tyers unabashedly embrace the entomological side of the sport. Learn more about Troutnut or support the project for an enhanced experience here.

Caddisfly Species Lepidostoma roafi (Little Brown Sedges)

Where & when

Time of year : September

Preferred waters: Streams and small rivers

This is a Northwestern species.

In 45 records from GBIF, adults of this species have mostly been collected during August (33%), September (24%), July (20%), October (11%), and June (9%).

In 16 records from GBIF, this species has been collected at elevations ranging from 33 to 9606 ft, with an average (median) of 8225 ft.