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.

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Coleoptera (Beetle) Insect Larva Coleoptera (Beetle) Insect Larva

Lateral view of a Coleoptera (Beetle) Insect Larva from Sears Creek in Washington

6 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.

Probably Pteronarcys biloba

Pteronarcys proteus (Salmonfly) Stonefly Nymph

10 Pictures

Artistic view of a Pteronarcys proteus (Pteronarcyidae) (Salmonfly) Stonefly Nymph from Mongaup Creek in New York

Collected April 18, 2006 from Mongaup Creek in New York

Added by Troutnut on April 21, 2006

Collected April 18, 2006 from Mongaup Creek in New York and added by Troutnut on April 21, 2006

GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681

GONZO on Oct 4, 2006October 4th, 2006, 11:12 am EDT

Everything seems consistent with P. biloba, the "Knobbed Salmonfly." Unlike dorsata, it is usually found in small streams and headwaters where it is a real mouthful for the little trout. Typical salmonfly nymph ties tend to be likewise, so I usually choose to imitate the younger, smaller generations of nymphs.

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Oct 4, 2006October 4th, 2006, 11:58 am EDT

Thanks. I've added a page for P. biloba with that information and changed the specimen's ID accordingly.

What's your source for the information? I still need to find a good source on stoneflies. I haven't tried hard yet since I've been focusing on mayflies, but it would be good to know where to start.

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681

GONZO on Oct 4, 2006October 4th, 2006, 1:02 pm EDT

Unfortunately, I'm not aware of a really good, up-to-date angler's book on stoneflies. The species I've identified today are ones I know well from personal experience.

I like Stoneflies for the Angler by Leiser and Boyle (Knopf, 1982 and Stackpole paperback reprint, 1990). It was accurate and well-researched for its day and is a good general angler's reference; but it lacks any systematic keys. There's also an Arbona stonefly book that I haven't seen or read.

And to answer your question from the other thread, I haven't come across a recent species level description of Epeorus that would be of any help.