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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Hydropsyche (Spotted Sedge) Caddisfly Larva Hydropsyche (Spotted Sedge) Caddisfly Larva

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington

With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.

9 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.

Male Ephemerella subvaria (Hendrickson) Mayfly Dun Pictures

Ruler view of a Male Ephemerella subvaria (Ephemerellidae) (Hendrickson) Mayfly Dun from the West Branch of the Delaware River in New York The smallest ruler marks are 1/16".

Ventral view of a Male Ephemerella subvaria (Ephemerellidae) (Hendrickson) Mayfly Dun from the West Branch of the Delaware River in New York

Male Ephemerella subvaria (Ephemerellidae) (Hendrickson) Mayfly Dun from the West Branch of the Delaware River in New York

Lateral view of a Male Ephemerella subvaria (Ephemerellidae) (Hendrickson) 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 May 7th, 2005 and added to Troutnut.com by Troutnut on May 16th, 2006.

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