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.

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

11 Recently Added Photos

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 August 22, 2006

Photos by Troutnut from the West Branch of Owego Creek in New York

Underwater photos by Troutnut from the West Branch of Owego Creek in New York

Closeup insects by Troutnut from the West Branch of Owego Creek in New York

Male Mystacides sepulchralis (Black Dancer) Caddisfly Adult

10 Pictures

Male Mystacides sepulchralis (Leptoceridae) (Black Dancer) Caddisfly Adult from the West Branch of Owego Creek in New York

This was one of many of its species which were gathered in small, low-flying swarms of about a dozen insects near the alder trees in the afternoon on a small stream.

Collected August 21, 2006 from the West Branch of Owego Creek in New York

Added by Troutnut on August 23, 2006

Collected August 21, 2006 from the West Branch of Owego Creek in New York and added by Troutnut on August 23, 2006

Female Stenacron interpunctatum (Light Cahill) Mayfly Dun

6 Pictures

Lateral view of a Female Stenacron interpunctatum (Heptageniidae) (Light Cahill) Mayfly Dun from the West Branch of Owego Creek in New York

This is a fairly small late-season female Stenacron dun.

Collected August 21, 2006 from the West Branch of Owego Creek in New York

Added by Troutnut on August 23, 2006

Collected August 21, 2006 from the West Branch of Owego Creek in New York and added by Troutnut on August 23, 2006

Female Isonychia bicolor (Mahogany Dun) Mayfly Dun

6 Pictures

Lateral view of a Female Isonychia bicolor (Isonychiidae) (Mahogany Dun) Mayfly Dun from the West Branch of Owego Creek in New York

This is a naturally crippled female Isonychia bicolor dun. One of her main wings came out as a deformed, crumpled yellow object. I found her flopped over on her side struggling on the surface of a small stream.

Collected August 21, 2006 from the West Branch of Owego Creek in New York

Added by Troutnut on August 23, 2006

Collected August 21, 2006 from the West Branch of Owego Creek in New York and added by Troutnut on August 23, 2006