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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.
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Wbranch has attached these 7 pictures to this report. The message is below.
Nicely colored up hen, probably has been in the creek a few weeks. Very strong fish, jumped repeatedly and almost put me in the backing.
An example of a very bright and fresh fish.  May have come up from the lake the day before.
Lovely pool with great green water, deep slots, and many fish.  We caught many fish from this pool.
You can see the deeper colored areas - that is where the steelhead like to lie - I have no idea why I look like such a doofus in this picture.
Exact same piece of water as the prior fish except this one is a minnow.
Great shot of a steelhead throwing water and flicking it's tail!
Nicely colored up cheeks on this buck.  I'll be going back in about a week.

Report at a Glance

General RegionErie County
Specific LocationGirard, PA
Dates FishedNov 4 - 6
Time of Day8:00 - noon & 1:00 - 5:00
Fish CaughtMostly fresh fish with a couple colored fish
Conditions & HatchesGood flow and green water. Cold in the mornings warming by mid day. Sucker spawn and various other egg pattern emergences HeHe.

Details and Discussion

Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on Nov 14, 2013November 14th, 2013, 6:13 pm EST
I have no idea why I look like such a doofus in this picture.

You know, Matt, I wasn't sure what you were referring to here at first...I didn't see past that fish...It's sort of like one of them women with a Shakespearian balcony telling you, "Hey. Hey buddy. My eyes are up here!":)

"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
Wbranch's profile picture
York & Starlight PA

Posts: 2635
Wbranch on Nov 14, 2013November 14th, 2013, 6:24 pm EST

Yea, I understand that. I'm the same way - if somebody sends me fish porn I look at the fish and after I go to the next picture I couldn't tell you if the guy was wearing a hat or not.
Catskill fly fisher for fifty-five years.
Entoman's profile picture
Northern CA & ID

Posts: 2604
Entoman on Nov 14, 2013November 14th, 2013, 8:01 pm EST
Thanks, Matt. I'll send back some of my favorite nymphs/eggs.
"It's not that I find fishing so important, it's just that I find all other endeavors of Man equally unimportant... And not nearly as much fun!" Robert Traver, Anatomy of a Fisherman

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