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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.

Dorsal view of a Chimarra (Philopotamidae) (Little Black Sedge) Caddisfly Larva from unknown in Wisconsin
Litobrancha
Knoxville TN

Posts: 51
Litobrancha on Sep 23, 2006September 23rd, 2006, 10:56 am EDT
This is a chimarra larvae. note the asymmetrical notch in the frontoclypeus (near the mandibles). the beautiful yellow color goes away in alcohol!

[edited by Troutnut: added title]

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