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.

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Neoleptophlebia Mayfly Nymph Neoleptophlebia Mayfly Nymph

Dorsal view of a Neoleptophlebia (Leptophlebiidae) Mayfly Nymph from the Yakima River in Washington

Some characteristics from the microscope images for the tentative species id: The postero-lateral projections are found only on segment 9, not segment 8. Based on the key in Jacobus et al. (2014), it appears to key to Neoleptophlebia adoptiva or Neoleptophlebia heteronea, same as this specimen with pretty different abdominal markings. However, distinguishing between those calls for comparing the lengths of the second and third segment of the labial palp, and this one (like the other one) only seems to have two segments. So I'm stuck on them both. It's likely that the fact that they're immature nymphs stymies identification in some important way.

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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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Fall ISO's - Au Sable

Brian314
Fenton, MI.

Posts: 28

Brian314 on Sep 26, 2020September 26th, 2020, 8:49 am EDT

Can anyone recommend the sizes for fall ISO duns and spinners on the Au Sable near Grayling ?

Wbranch

York & Starlight PA

Posts: 2635

Wbranch on Sep 27, 2020September 27th, 2020, 10:22 am EDT

Well I would venture a guess of #10 - #12 as that is the size of the Iso's on the Delaware River in NY. It may be the same genus.

Catskill fly fisher for fifty-five years.

Partsman

bancroft michigan

Posts: 321

Partsman on Sep 27, 2020September 27th, 2020, 10:57 am EDT

Ive been using a adams parachute in traditional gray and also in a purple color in size 12 and 14, you know were I like to fish, Ive done alright on small to medium size brookies, and finally got a medium size brown last week. Fishing tight to the wood, and bubble lines when you can find them. Water is very low and clear right now. It looks like a weather event for next week, and im going with streamers if it cools down and we get some much needed rain.
Mike.

Brian314
Fenton, MI.

Posts: 28

Brian314 on Oct 3, 2020October 3rd, 2020, 11:32 am EDT

Well, I'm going up to the HW and South Branch tomorrow (sunday) for 3 days. Tied up some ISO duns (size 12) w the 4:1 muskrat grey: olive color and some ISO spinners w mahogany dub. Plan on using them in the evening.
Will let you know if I have any success.
Rain on Sunday when I go up so I'm hoping on some streamer fishing Monday (Oct 5) - have tied some Black Ghosts, Clousers and a few dark, rabbit strip cone-heads for that.
If I catch anything worth taking a picture I will post. :-)

Partsman

bancroft michigan

Posts: 321

Partsman on Oct 3, 2020October 3rd, 2020, 11:46 am EDT

Good luck, should be decent fishing. Just being in the quiet is worth it to me.
Mike.

Brian314
Fenton, MI.

Posts: 28

Brian314 on Oct 18, 2020October 18th, 2020, 4:29 am EDT

Well, caught only one smallish brown on a streamer in the SB - and nothing else - despite changing colors and streamer types. Gave up on streamers. Had better luck w nymphs - caught several small brookies and a ~12" brown. For me this was a successful trip...LOL. :-)

Partsman

bancroft michigan

Posts: 321

Partsman on Oct 19, 2020October 19th, 2020, 1:02 pm EDT

Brian314, good to hear you got into some fish. Beautiful time of the year in northern Michigan!
Mike.

Brian314
Fenton, MI.

Posts: 28

Brian314 on Nov 24, 2020November 24th, 2020, 7:47 am EST

Yea Mike - later Sept thru October is really my favorite times to fish the Au Sable. I went first week in Oct and the Tamaracks were only just starting to turn - missed it by a few weeks...darn. Now, a long winter ahead but I will be back at it when the Henny's start up ! :-)