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.

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

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.

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.

Drunella "lata" recently revised.

Drunella cornuta (Large Blue-Winged Olive) Mayfly Nymph

7 Pictures

Dorsal view of a Drunella cornuta (Ephemerellidae) (Large Blue-Winged Olive) Mayfly Nymph from the Long Lake Branch of the White River in Wisconsin

Collected June 4, 2005 from the Long Lake Branch of the White River in Wisconsin

Added by Troutnut on May 25, 2006

Collected June 4, 2005 from the Long Lake Branch of the White River in Wisconsin and added by Troutnut on May 25, 2006

Dsc1
Posts: 2

Dsc1 on Oct 25, 2008October 25th, 2008, 1:42 pm EDT

Dave Funk et al. (2008) just reestablished the species of D. cornuta and D. cornutella in a very elegant paper looking at morphological, biological, and molecular evidence. The three species are easily identifiable in New Hampshire. Your photos above seems to be of Drunella cornuta.

GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681

GONZO on Oct 25, 2008October 25th, 2008, 2:30 pm EDT

Hi Don,

It's great to have you posting here!

There are several ephemerellid species pages that will need updating to reflect very recent work (the Funk et al. paper and the Jacobus/McCafferty revision of the Ephemerellinae). I suspect that Jason has just been too busy with his studies to do that yet.

Best,
Lloyd

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Oct 26, 2008October 26th, 2008, 6:34 am EDT

Yeah, thanks for the updates! Gonzo is right that I'm really tied up with classes right now (in the middle of my busiest semester of grad school) so I haven't been able to keep up, but rest assured that I will carefully comb through all these recent threads and incorporate your corrections when I can.

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist