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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.

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.
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 12, 2007

Updates from May 12, 2007

Photos by Troutnut from the West Branch of the Delaware River in New York

An 18-inch Catskill brown trout.
The West Branch of the Delaware River in New York
This is a common sight on the large Catskill rivers in early May, a mother goose guarding her nest.  They like to nest on midstream islands where anglers are prone to walk from one fishing spot to another, and they do not back down.  This one was hissing at me and I didn't want to get any closer.

From the West Branch of the Delaware River in New York
The West Branch of the Delaware River in New York
The West Branch of the Delaware River in New York
The West Branch of the Delaware River in New York

Underwater photos by Troutnut from the West Branch of the Delaware River in New York

Here's the head of a sea lamprey which migrated up the Delaware River to spawn.
These are red-spotted newts, Notophthalmus viridescens viridescens.  Thanks Gonzo for the ID.

From the West Branch of the Delaware River in New York
Here's the body of a sea lamprey which migrated up the Delaware River to spawn.
The West Branch of the Delaware River in New York
The West Branch of the Delaware River in New York
The West Branch of the Delaware River in New York

Closeup insects by Troutnut from the Delaware River, the West Branch of the Delaware River, and Miscellaneous New York in New York

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