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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.

Troutnut
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Bellevue, WA

Posts: 2758
Troutnut on Apr 4, 2008April 4th, 2008, 3:58 pm EDT
Last spring I spent a few months working on another website, then put it on hold at about 95% completion when I ran off to grad school. I finally found a few minutes here and there to finish up, so here it is:

HackleHead Fly Tying Contest

Current contests


  • Grand Opening Contest -- $50 Orvis gift certificate for first place, $25 for second place.

  • Fly Fishing Blogger Showdown -- A competition for those of you with websites. The twist is that you can use your blog to get people to vote for you. The winner's prize is pretty good, so check it out.



It also only takes about 30 seconds to add a fly, once you've got the picture, unless you add some optional details.

Head on over and try it out!!
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Troutnut
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Administrator
Bellevue, WA

Posts: 2758
Troutnut on Apr 7, 2008April 7th, 2008, 11:32 am EDT
Come on, guys... I know some of you have pictures of flies you've tied sitting around on your hard drives. Let's see them!

At least sign in and check out and rate the other flies.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Troutnut
Troutnut's profile picture
Administrator
Bellevue, WA

Posts: 2758
Troutnut on Apr 20, 2008April 20th, 2008, 7:33 pm EDT
Got a good start so far! People have put some really cool stuff up.

One of the best parts of the site right now is a profile of Gonzo's flies. I borrowed a couple of his flyboxes and photographed everything in them to put on Hacklehead. They're not only realistic, but lifelike and fishable, too.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist

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