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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 Ephemerella mucronata (Ephemerellidae) Mayfly Nymph from the Yakima River in Washington
This is an interesting one. Following the keys in Merritt R.W., Cummins, K.W., and Berg, M.B. (2019) and Jacobus et al. (2014), it keys clearly to Ephemerella. Jacobus et al provide a key to species, but some of the characteristics are tricky to interpret without illustrations. If I didn't make any mistakes, this one keys to Ephemerella mucronata, which has not previously been reported any closer to here than Montana and Alberta. The main character seems to fit well: "Abdominal terga with prominent, paired, subparallel, spiculate ridges." Several illustrations or descriptions of this holarctic species from the US and Europe seem to match, including the body length, tarsal claws and denticles, labial palp, and gill shapes. These sources include including Richard Allen's original description of this species in North America under the now-defunct name E. moffatae in Allen RK (1977) and the figures in this description of the species in Italy.
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.

Falsifly has attached these 7 pictures. The message is below.
Falsifly
Falsifly's profile picture
Hayward, WI.

Posts: 660
Falsifly on May 3, 2011May 3rd, 2011, 8:39 pm EDT
Born in Denver CO. and moved to Hayward WI. at the age of one. He cut his baby teeth fishing on the Namekagon but beckoned to the call of his native state where he now resides once again. Fortunate for me I have an excuse to depart westward for the reunion of father, son and the holy trout. I have just as much fun, if not more, snapping pictures like these than I do fishing. I use to out fish Justin, but he’s starting to kick my butt regularly, and when he does the browbeating is relentless. I’m reminded now of how frustrated I was when my dad caught all the fish, but it seems he’s turning the table on me.

PS. Check out the last photo in full size, Jason's new panoramic feature sure is cool! Thanks Jason
Falsifly
When asked what I just caught that monster on I showed him. He put on his magnifiers and said, "I can't believe they can see that."
Oldredbarn
Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on May 4, 2011May 4th, 2011, 7:14 am EDT
and when he does the browbeating it is relentless


Pops...You know what they say about pay-backs...;)

Humility a stream is the highest level of angling and most time the wisest...One never knows when them trout might decide to play hard-to-get or when ones son grows up to out fish you...

Nice post and lets work on getting Justin up and running on TroutNut...Looks like he learned something from you there, dad!

Spence
"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
Motrout
Motrout's profile picture
Posts: 319
Motrout on May 4, 2011May 4th, 2011, 5:35 pm EDT
Great pictures. Very pretty.

I want to ask what river, but I doubt I'd get an answer.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
http://fishingintheozarks.blogspot.com/
Falsifly
Falsifly's profile picture
Hayward, WI.

Posts: 660
Falsifly on May 6, 2011May 6th, 2011, 3:05 am EDT


This is a shot looking northward toward, the not too distant, Durango CO. The pictures were taken on the San Juan during the month of March.
Falsifly
When asked what I just caught that monster on I showed him. He put on his magnifiers and said, "I can't believe they can see that."
Motrout
Motrout's profile picture
Posts: 319
Motrout on May 6, 2011May 6th, 2011, 6:18 pm EDT
I've never gotten a chance to fish the San Juan-hence I couldn't recognize it:)

But its on the bucket list for sure, especially after seeing those pics.
"I don't know what fly fishing teaches us, but I think it's something we need to know."-John Gierach
http://fishingintheozarks.blogspot.com/

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