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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

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.

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.

Lateral view of a Mystacides sepulchralis (Leptoceridae) (Black Dancer) Caddisfly Adult from the Bois Brule River in Wisconsin
I captured this small caddisfly from one of many dense mating swarms under overhanging alder trees in a slow stretch of the river. There were localized rises of trout under the swarms.
Knoxville TN

Posts: 51
Litobrancha on Sep 23, 2006September 23rd, 2006, 4:52 pm EDT
mystacides. note the folded tent like posterior portion of the wings.
Site Editor
"Bear Swamp," PA

Posts: 1681
GONZO on Sep 23, 2006September 23rd, 2006, 7:05 pm EDT
A "Black Dancer" for sure. LaFontaine says that the shiny black wing is indicative of sepulchralis. However, on the Lehigh River and Mud Run I have found shiny-winged specimens and dull-winged specimens in the same swarm. And sepulchralis is the only Mystacides species in the collecting record for Carbon and Monroe counties. Still, I'd say sepulchralis is a safe bet.
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Bellevue, WA

Posts: 2758
Troutnut on Sep 24, 2006September 24th, 2006, 8:43 am EDT
You're right. I've got some much better Mystacides pictures lately with my new camera setup. I forgot I had one from the old site too.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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