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Lateral view of a Male Baetis (Baetidae) (Blue-Winged Olive) Mayfly Dun from Mystery Creek #43 in New York
Blue-winged Olives
Baetis

Tiny Baetis mayflies are perhaps the most commonly encountered and imitated by anglers on all American trout streams due to their great abundance, widespread distribution, and trout-friendly emergence habits.

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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Roguerat
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Posts: 456
Roguerat on Mar 10, 2015March 10th, 2015, 5:41 am EDT
Here's the Lower Platte in full swing, likely my kids are somewhere in that mess...
Oldredbarn
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Novi, MI

Posts: 2600
Oldredbarn on Mar 10, 2015March 10th, 2015, 2:26 pm EDT
What a mess!

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
Roguerat
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Roguerat on Mar 10, 2015March 10th, 2015, 3:05 pm EDT
Spence-

That's the scene below M-22...why I stayed way upriver, safe and sane.
My oldest daughter and grandsons float the Lower Platte every summer, too much for me.

By Fall it's too cold to tube and the Steelies and Salmon can head upriver without negotiating traffic-jams.

BTW, I'm enjoying fresh windmill cookies and a tall, cold glass of milk at this moment. Goed!!

Roguerat
Oldredbarn
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Novi, MI

Posts: 2600
Oldredbarn on Mar 10, 2015March 10th, 2015, 6:59 pm EDT
:)

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
Oldredbarn
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Novi, MI

Posts: 2600
Oldredbarn on Mar 11, 2015March 11th, 2015, 2:18 pm EDT
On Gates' hatch chart they actually have listed the "Aluminus flotilla" hatch starting at the beginning of June...Memorial Day being opening weekend for the canoe hatch...

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
MiltRPowell
Posts: 106
MiltRPowell on Mar 11, 2015March 11th, 2015, 2:55 pm EDT
Re-looking the photo, I think I see. huh? maybe a
pupa 16inch (green) tube hatch also, but could be bad photo, or me... Caddis kids, not light cahill wet.
Huh? I don't know, don't look good for fishing that day anyway....

flyfishingthecreekM.R.P.
Feathers5
Posts: 287
Feathers5 on Mar 12, 2015March 12th, 2015, 6:00 am EDT
If you catch one, gut it and take it home. I bet that will end that hatch.

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