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.

Sunlight perfectly strikes the trees at a bend in the Foss River in the Washington Cascades.

From the Foss River in Washington

Stream photos

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Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington

I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.

11 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.

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Dolophilodes (Philopotamidae)

Male Dolophilodes distincta (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult

6 Pictures

Lateral view of a Male Dolophilodes distincta (Philopotamidae) (Tiny Black Gold Speckled-Winged Caddis) Caddisfly Adult from Mystery Creek #42 in Pennsylvania

This caddis species was dancing high over the stream, spaced a foot or two apart across most of its width, very much like Ephemera mayfly spinners but with more side-to-side motion mixed in. There were more than enough to get the trout interested, but I wasn't able to stick around until they fell on the water (if they did at all).

Collected May 27, 2007 from Mystery Creek #42 in Pennsylvania

Added by Troutnut on June 4, 2007

Collected May 27, 2007 from Mystery Creek #42 in Pennsylvania and added by Troutnut on June 4, 2007

Litobrancha
Knoxville TN

Posts: 51

Litobrancha on Jun 12, 2007June 12th, 2007, 8:04 am EDT

This is a male dolophilodes, probably distinctus.

You can distinguish philopotamids from hydropsychids by the ocellar head warts that are absent in hydropsychids.

D. distinctus is everywhere, along with Oecetis inconspicua, including perhaps the moon, inner four planets and in orbit. it is a beautiful insect however.

Troutnut