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.

I caught a nice brookie a few weeks earlier in this pool at the junction of a split channel in the stream. The huge fallen tree is great cover.

From the Mystery Creek # 23 in New York

Stream photos

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Perlodidae (Springflies and Yellow Stones) Stonefly Nymph Perlodidae (Springflies and Yellow Stones) Stonefly Nymph

Artistic view of a Perlodidae (Springflies and Yellow Stones) Stonefly Nymph from the Yakima River in Washington

This one seems to lead to Couplet 35 of the Key to Genera of Perlodidae Nymphs and the genus Isoperla, but I'm skeptical that's correct based on the general look. I need to get it under the microscope to review several choices in the key, and it'll probably end up a different Perlodidae.

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.

Updates from May 22, 2007

Closeup insects by Troutnut from Miscellaneous New York, the Neversink River, and the Little Juniata River in New York and Pennsylvania

Female Acroneuria lycorias (Golden Stone) Stonefly Adult

17 Pictures

Lateral view of a Female Acroneuria lycorias (Perlidae) (Golden Stone) Stonefly Adult from Aquarium (collected somewhere in Catskills) in New York

Collected May 22, 2007 from Aquarium (collected somewhere in Catskills) in New York

Added by Troutnut on June 4, 2007

Collected May 22, 2007 from Aquarium (collected somewhere in Catskills) in New York and added by Troutnut on June 4, 2007

Female Baetisca obesa (Armored Mayfly) Mayfly Dun

12 Pictures

Lateral view of a Female Baetisca obesa (Baetiscidae) (Armored Mayfly) Mayfly Dun from the Neversink River (aquarium-raised) in New York

This Baetisca obesa dun hatched out in my aquarium from nymphs collected a couple weeks earlier.

Collected May 22, 2007 from the Neversink River (aquarium-raised) in New York

Added by Troutnut on June 4, 2007

Collected May 22, 2007 from the Neversink River (aquarium-raised) in New York and added by Troutnut on June 4, 2007

Female Stenonema ithaca (Light Cahill) Mayfly Dun

10 Pictures

Lateral view of a Female Stenonema ithaca (Heptageniidae) (Light Cahill) Mayfly Dun from the Little Juniata River in Pennsylvania

This female looks very much like a male I collected a few hundred miles away a few days later, so I'm guessing it's the same species, which I believe is Maccaffertium mediopunctatum.

Collected May 22, 2007 from the Little Juniata River in Pennsylvania

Added by Troutnut on June 4, 2007

Collected May 22, 2007 from the Little Juniata River in Pennsylvania and added by Troutnut on June 4, 2007