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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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

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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.

Updates from July 8, 2011

Closeup insects by Bnewell from the Touchet River in Washington

Female Rhithrogena Mayfly Spinner

1 Picture

Female Rhithrogena (Heptageniidae) Mayfly Spinner from the Touchet River in Washington

Collected July 8, 2011 from the Touchet River in Washington

Added by Bnewell on July 10, 2011

Collected July 8, 2011 from the Touchet River in Washington and added by Bnewell on July 10, 2011

Sweltsa fidelis (Sallfly) Stonefly Adult

1 Picture

Sweltsa fidelis (Chloroperlidae) (Sallfly) Stonefly Adult from the Touchet River in Washington

Another yellow stonefly from Touchet Corral.

Collected July 8, 2011 from the Touchet River in Washington

Added by Bnewell on July 9, 2011

Collected July 8, 2011 from the Touchet River in Washington and added by Bnewell on July 9, 2011

Alloperla severa (Sallfly) Stonefly Adult

1 Picture

Alloperla severa (Chloroperlidae) (Sallfly) Stonefly Adult from the Touchet River in Washington

At Touchet Corral.

Collected July 8, 2011 from the Touchet River in Washington

Added by Bnewell on July 9, 2011

Collected July 8, 2011 from the Touchet River in Washington and added by Bnewell on July 9, 2011

Comments / replies

Waxsmith
CANADA

Posts: 6

Waxsmith on Jul 13, 2011July 13th, 2011, 7:24 am EDT

Most of the pictures on this site are great, however, in some cases, for instance in the case of the mayfly types it would be so great if there was some indication of average size of the depicted specimen.Mayflies in their enormous array of sizes are hard to distinguish because colour alone often will not do it.
Thanks, A.K.

What is this supposed to look like, example please.