Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Neversink Gorge (Wolf Brook) in New York

Stream photos

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Doroneuria baumanni (Golden Stone) Stonefly Nymph Doroneuria baumanni (Golden Stone) Stonefly Nymph

Dorsal view of a Doroneuria baumanni (Perlidae) (Golden Stone) Stonefly Nymph from Sears Creek in Washington

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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 30, 2010

Closeup insects by Bnewell from the Flathead River and Flathead Lake in Montana

Male Drunella flavilinea (Flav) Mayfly Spinner

1 Picture

Male Drunella flavilinea (Ephemerellidae) (Flav) Mayfly Spinner from the Flathead River-lower in Montana

Collected July 30, 2010 from the Flathead River-lower in Montana

Added by Bnewell on June 29, 2011

Collected July 30, 2010 from the Flathead River-lower in Montana and added by Bnewell on June 29, 2011

Male Hexagenia limbata (Hex) Mayfly Dun

2 Pictures

Male Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from Flathead Lake in Montana

This species is very abundant in Flathead and Whitefish Lakes with a smaller population in lakes of the Swan River Drainage, and a few in Lake McDonald in Glacier Park. This species usually emerges along with Ephemera simulans.

Collected July 30, 2010 from Flathead Lake in Montana

Added by Bnewell on June 29, 2011

Collected July 30, 2010 from Flathead Lake in Montana and added by Bnewell on June 29, 2011