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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

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.

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
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.

Lateral view of a Cheumatopsyche (Hydropsychidae) (Little Sister Sedge) Caddisfly Pupa from Cayuta Creek in New York
This is the first fully formed caddis pupa (technically, a pharate adult) that I've collected and photographed alive and healthy. I'll put a video of this specimen online soon, too.
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"Bear Swamp," PA

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GONZO on Apr 23, 2007April 23rd, 2007, 11:11 am EDT
This looks like a hydropsychid to me, but I'd be happy to have comments from the experts.
Posts: 17
Earlfishman on Apr 23, 2007April 23rd, 2007, 2:56 pm EDT
With abdominal gills like that, and the hook plates on ab. 3-5 it sure looks like a Hydropsychidae to me as well.
Knoxville TN

Posts: 51
Litobrancha on Apr 24, 2007April 24th, 2007, 1:42 am EDT
probably cheumatopsyche... in hydropsyche/ceratopsyche the hooks at the posterior end of the abdomen are longer on the outside (distal), this one looks longer medially a la cheumatopsyche.

jason did you get this critter to emerge from the pupal shuck?
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"Bear Swamp," PA

Posts: 1681
GONZO on Apr 24, 2007April 24th, 2007, 4:47 am EDT
Earl--thanks for the confirmation.

Lito--I suspected that this might be Cheumatopsyche, but I had no key. Thanks for the information about one of the distinguishing characters. Size, emergence timing, and wing/body colors were the things that made me lean toward Cheumatopsyche.
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Bellevue, WA

Posts: 2758
Troutnut on Apr 24, 2007April 24th, 2007, 5:16 am EDT
I tried to let it emerge, but no luck.
Jason Neuswanger, Ph.D.
Troutnut and salmonid ecologist
Posts: 17
Earlfishman on Apr 24, 2007April 24th, 2007, 2:42 pm EDT

Out of curiosity, do you have a reference for a key that takes Trichop pupae past family? That would be a handy thing to have access to.

Grants Pass, OR

Posts: 302
Creno on Dec 22, 2007December 22nd, 2007, 11:25 am EST
Earfishman - there is some information available for separating pupae to genus. Info for the hydropsychids is in Ross 1944.

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