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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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DUBBN
DUBBN's profile picture
Colorado

Posts: 47
DUBBN on Dec 24, 2012December 24th, 2012, 12:50 am EST
Four days off for the Holiday left me time to BBQ ribs and start filling my fly Boxes. The first three patterns I will be using on a local Tailwater (Frying Pan) this morning. The rest will be used in a few weeks/Month.














It's OK to disagree with me. I can not force you to be right.
Kschaefer3
Kschaefer3's profile picture
St. Paul, MN

Posts: 376
Kschaefer3 on Dec 24, 2012December 24th, 2012, 4:17 am EST
Very nice flies! What sizes are they? Good luck fishing, let us know how it goes.
DUBBN
DUBBN's profile picture
Colorado

Posts: 47
DUBBN on Dec 24, 2012December 24th, 2012, 1:35 pm EST
The top two flies are 20, and 22 I did very well with them today. The rest are 14's and 10's I wont use them too much till Spring













I had alot of fun today.
It's OK to disagree with me. I can not force you to be right.
Oldredbarn
Oldredbarn's profile picture
Novi, MI

Posts: 2600
Oldredbarn on Dec 24, 2012December 24th, 2012, 7:19 pm EST
Hey fella you are breaking my heart here! :) That Bow looks sweet.

You need to pass on some recipes...I'm curious, what are you using on those abdomens on those last three flies?

The river looks good...We just finally got a couple inches of snow this evening to make it look like Christmas and the temp dropped a bit.

You can PM me if you wish to save some secrets...:)

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
DUBBN
DUBBN's profile picture
Colorado

Posts: 47
DUBBN on Dec 25, 2012December 25th, 2012, 3:00 am EST
Spence, no secrets. The abdomens are Midge Tubing with wire or Krystalflash inserted as a core. I really doubt that this technique makes a bit of difference to the fish, but I enjoy using it. Ribbing the abdomen with wire after midge tubing has been applied would work just as well.

It's a technique that works well for me on patterns as small as 22 and 24's aswell

It's OK to disagree with me. I can not force you to be right.

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