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.

A small, old rock wing dam has created an excellent riffle and pool in this classic trout stream.

Stream photos

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Tricorythodes (Trico) Mayfly Nymph Tricorythodes (Trico) Mayfly Nymph

Dorsal view of a Tricorythodes (Leptohyphidae) (Trico) Mayfly Nymph from Mystery Creek #308 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.

Site updates from June 25, 2008

Closeup insects by Bnewell from Yellow Bay Creek and Denali National Park in Montana and Alaska

Female Ironodes nitidus (Slate Maroon Drake) Mayfly Spinner

3 Pictures

Female Ironodes nitidus (Heptageniidae) (Slate Maroon Drake) Mayfly Spinner from Yellow Bay Creek in Montana

While relatively rare in most of western Montana, it is common in several small streams along the east side of Flathead Lake and streams on the south side of the Flathead Indian Reservation.

Collected June 24, 2008 from Yellow Bay Creek in Montana

Added by Bnewell on June 28, 2011

Collected June 24, 2008 from Yellow Bay Creek in Montana and added by Bnewell on June 28, 2011

Limnephilus externus (Summer Flier Sedge) Caddisfly Larva

1 Picture

Limnephilus externus (Limnephilidae) (Summer Flier Sedge) Caddisfly Larva from Temporary ponds- Glacier Nat. Park in Alaska

This caddis is one of the most abundant caddisflies in temporary ponds of Glacier Park. The larvae build a round case of detritus and dead plant material that can get quite large.

Collected June 24, 2008 from Temporary ponds- Glacier Nat. Park in Alaska

Added by Bnewell on June 26, 2011

Collected June 24, 2008 from Temporary ponds- Glacier Nat. Park in Alaska and added by Bnewell on June 26, 2011