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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.
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.

AndresT
Vigo-Spain

Posts: 25
AndresT on Sep 9, 2011September 9th, 2011, 7:01 am EDT
Tyed on a #10 hook.



JOHNW
JOHNW's profile picture
Chambersburg, PA

Posts: 452
JOHNW on Sep 10, 2011September 10th, 2011, 4:33 am EDT
Beautiful ties Andres!
"old habits are hard to kill once you have gray in your beard" -Old Red Barn
Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197
Shawnny3 on Sep 10, 2011September 10th, 2011, 5:03 am EDT
Beautiful, as always. See you in November?

-Shawn
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com
AndresT
Vigo-Spain

Posts: 25
AndresT on Sep 10, 2011September 10th, 2011, 2:46 pm EDT
Thank you JOHNW, I am glad you like them.

Shawn, thank you. I am afraid I am not going this year to the show, as Jorge and I will be at the Western North Carolina Fly Fishing Expo. I hope you have a good time at the show.

Andrés.
Troutnut
Troutnut's profile picture
Administrator
Bellevue, WA

Posts: 2758
Troutnut on Sep 10, 2011September 10th, 2011, 4:26 pm EDT
Outstanding flies!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
AndresT
Vigo-Spain

Posts: 25
AndresT on Sep 12, 2011September 12th, 2011, 7:11 am EDT
Thank you Jason. Two more pics:



AndresT
Vigo-Spain

Posts: 25
AndresT on Sep 12, 2011September 12th, 2011, 7:24 am EDT
This pattern is very productive and easy to tie.
Materials:
Hook: Varivas #10 terrestrial
Thread: 8/0
Body: black foam tube
Legs: elastic thread (sylicone)
Elytra: Realistic Elytra
Bug Bond to protect foam and give a glow finish.
Shawnny3
Moderator
Pleasant Gap, PA

Posts: 1197
Shawnny3 on Sep 14, 2011September 14th, 2011, 3:54 pm EDT
Sorry to hear you won't be there, Andres. Perhaps next year.

Best,
Shawn
Jewelry-Quality Artistic Salmon Flies, by Shawn Davis
www.davisflydesigns.com
Sayfu
Posts: 560
Sayfu on Nov 25, 2011November 25th, 2011, 3:48 am EST

I'd never get my wife to remove the hook using one of those flies!

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