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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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.

Big Slate Drakes

This common name refers to only one species. Click its scientific name to learn more.

Mayfly Species Hexagenia atrocaudata

These are sometimes called Big Slate Drakes.

This species is slightly smaller than Hexagenia limbata and it occurs later in the year. It is only mentioned in passing by a few authors, but it can be locally important.

Female Hexagenia atrocaudata (Late Hex) Mayfly Dun

14 Pictures

Lateral view of a Female Hexagenia atrocaudata (Ephemeridae) (Late Hex) Mayfly Dun from the Teal River in Wisconsin

I found this lone Hexagenia atrocaudata dun fluttering by herself on the surface of a small, still stretch of river one evening as I paddled home from fishing for smallmouths in the warm August weather.

Collected August 4, 2005 from the Teal River in Wisconsin

Added by Troutnut on April 14, 2006

Collected August 4, 2005 from the Teal River in Wisconsin and added by Troutnut on April 14, 2006

Male Hexagenia atrocaudata (Late Hex) Mayfly Spinner

3 Pictures