Header image

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.

Mystery Creek # 256 in Idaho

Featured on the forum

Re: Trico emergers
In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

Re: Trico Tips
In the Mayfly Genus Tricorythodes by Martinlf

Re: UV spectrum and trout
In General Discussion by Martinlf

Re: closing the gender gap in flyfishing
In General Discussion by Konchu (Smallflyguy replied)

Re: Fishing Kupa River, Slovenia
In Fishing Reports by Slocum (Fish1 replied)

Isoperla (Stripetails and Yellow Stones) Stonefly Adult Isoperla (Stripetails and Yellow Stones) Stonefly Adult

Dorsal view of a Isoperla (Perlodidae) (Stripetails and Yellow Stones) Stonefly Adult from Mystery Creek #308 in Washington

9 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.

Freshwater Invertebrate Underwater Pictures, Page 5

Freshwater Invertebrate Underwater Pictures, Page 5

Underwater photos of freshwater invertebrates in their natural habitat.

Hemlock Creek in New York

Spring Creek in Wisconsin

I spotted this very large leech freely tumbling, and occasionally stopping, along the bottom of a clear, cool trout stream. I paid careful attention later and spotted two more like it, but this one was the largest -- probably over 7 inches stretched out.

There is one other picture of it.

Several Baetid mayfly nymphs cling to this rock. There are also some clumps of small stones which hold strong caddisfly larvae.

From Eighteenmile Creek in Wisconsin

A careful look at this picture reveals at least three water boatmen swimming around.

The mayfly and stonefly nymphs in this picture blend in extremely well.

A couple tiny aquatic mites are clinging to this rock.

From Mystery Creek # 90 in Wisconsin

Here's the surface of the river viewed from below during a Tricorythodes spinner fall. Several dead spinners are visible.

The East Branch of Trout Brook in New York

Mystery Creek # 90 in Wisconsin

A peculiar mayfly nymph clings to a log. I'm not sure if it's a Heptageniid clinger or a flat-bodied Ephemerellid crawler, but I don't believe it's a species I've collected yet.

From Eighteenmile Creek in Wisconsin

The strange tubes all over this rock house tiny midge larvae.

A large Ephemerella subvaria nymphs clings to a log along with a couple smaller mayfly nymphs.

Troutnut.com is copyright © 2004-2024 Jason Neuswanger (email Jason). privacy policy