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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.

Dorsal view of a Pycnopsyche guttifera (Limnephilidae) (Great Autumn Brown Sedge) Caddisfly Larva from the Yakima River in Washington
This specimen appears to be of the same species as this one collected in the same spot two months earlier. The identification of both is tentative. This one suffered some physical damage before being photographed, too, so the colors aren't totally natural. I was mostly photographing it to test out some new camera setting idea, which worked really well for a couple of closeups.
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.

ReelnCreel has attached this picture to aid in identification. The message is below.
Posts: 3
ReelnCreel on Apr 25, 2010April 25th, 2010, 1:35 pm EDT

I live in Nova Scotia. Found this guy in a river that runs into the Avon River which runs into the bay of fundy. This guy was not far from a tidal area. Hes quite different from all the other nymphs in the area which I assume where mayfly. Only one tail and its quite red. Just wondering what it is.

Martinlf's profile picture
Palmyra PA

Posts: 3047
Martinlf on Apr 25, 2010April 25th, 2010, 1:39 pm EDT
Cool. The bug guys will eventually have a go at this. Are you sure about the one tail, though? Could the other(s) have been broken off at some point?
"He spread them a yard and a half. 'And every one that got away is this big.'"

--Fred Chappell
rochester mn

Posts: 133
Dryfly on Apr 25, 2010April 25th, 2010, 1:44 pm EDT
It's a heptageniid. No idea what species though.
Posts: 3
ReelnCreel on Apr 25, 2010April 25th, 2010, 1:46 pm EDT
pretty sure about the one tail, he had it raised at one point
Wiflyfisher's profile picture

Posts: 622
Wiflyfisher on Apr 25, 2010April 25th, 2010, 2:47 pm EDT
That is definitely looks like a Heptageniidae mayfly. When their tails are wet they tend to cling together. See this photo...

Posts: 3
ReelnCreel on Apr 26, 2010April 26th, 2010, 11:42 am EDT
Yeah, simply searching for mayfly nymph pictures i get a few that look the same and have very similar coloring. It's crazy how diverse insects are. I've seen two other types of nymphs in the same area, having completely different size and colors but more common shape. Not to mention all the other creepy crawlies. Thanks a lot for your help guys.

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