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.

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Limnephilidae (Giant Sedges) Caddisfly Larva Limnephilidae (Giant Sedges) Caddisfly Larva

Dorsal view of a Limnephilidae (Giant Sedges) Caddisfly Larva from the Yakima River in Washington

This specimen resembled several others of around the same size and perhaps the same species, which were pretty common in my February sample from the upper Yakima. Unfortunately, I misplaced the specimen before I could get it under a microscope for a definitive ID.

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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.

Female Neoleptophlebia Mayfly Dun Pictures

I'm just guessing Neoleptophlebia instead of Paraleptophlebia on this one because I tended to find more of their nymphs in the area, but take that with a grain of salt.

Ruler view of a Female Neoleptophlebia (Leptophlebiidae) Mayfly Dun from the West Branch of the Delaware River in New York The smallest ruler marks are 1 mm.

Lateral view of a Female Neoleptophlebia (Leptophlebiidae) Mayfly Dun from the West Branch of the Delaware River in New York

Female Neoleptophlebia (Leptophlebiidae) Mayfly Dun from the West Branch of the Delaware River in New York

Dorsal view of a Female Neoleptophlebia (Leptophlebiidae) Mayfly Dun from the West Branch of the Delaware River in New York

Ventral view of a Female Neoleptophlebia (Leptophlebiidae) Mayfly Dun from the West Branch of the Delaware River in New York

This mayfly was collected from the West Branch of the Delaware River in New York on June 1st, 2007 and added to Troutnut.com by Troutnut on June 4th, 2007.

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