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.

We were lucky to be able to fish through this storm as it skirted around us to the north, giving us just enough clouds to prompt a BWO hatch but keeping the lighting at a safe distance.

From Slough Creek in Wyoming

Stream photos

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Holocentropus Caddisfly Larva Holocentropus Caddisfly Larva

Dorsal view of a Holocentropus (Polycentropodidae) Caddisfly Larva from the Yakima River in Washington

This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.

11 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.

suggestion

Goose
Posts: 77

Goose on Oct 24, 2006October 24th, 2006, 3:05 am EDT

Jason: Do you have the software that will notify people by email when their questions on the forum are being addressed? If not, it would be a good idea. I'm not being critical just suggesting. The site is fantastic.

Troutnut

Administrator
Bellevue, WA

Posts: 2758

Troutnut on Oct 24, 2006October 24th, 2006, 5:44 am EDT

I haven't coded that into the forum yet. I know a lot of other forum software has that option, but I always considered it a little bit annoying when I keep getting emails every time there's a new reply.

If many more people are interested, though, I could probably program it as an optional feature in your settings.

Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist