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.

Turquoise view of Upper Titcomb Lake

From Titcomb Basin in Wyoming

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.

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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.

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psilotreta

Male Psilotreta labida (Dark Blue Sedge) Caddisfly Adult

11 Pictures

Lateral view of a Male Psilotreta labida (Odontoceridae) (Dark Blue Sedge) Caddisfly Adult from the West Branch of the Delaware River in New York

Collected May 31, 2007 from the West Branch of the Delaware River in New York

Added by Troutnut on June 4, 2007

Collected May 31, 2007 from the West Branch of the Delaware River in New York and added by Troutnut on June 4, 2007

Litobrancha
Knoxville TN

Posts: 51

Litobrancha on Jun 4, 2007June 4th, 2007, 11:47 am EDT

pretty sure this psilotreta, possibly labida. frontalis has big puffy head warts that pop out and hairy maxillary palps. some of the other species are lighter colored.

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Jun 4, 2007June 4th, 2007, 12:14 pm EDT

Thanks. :) That would fit pretty well.

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

Blue-winged OlivesBaetis

Troutnut Forum › Specimen Discussion › psilotreta