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.

Here Oksrukuyik Creek flows away from the Dalton Highway toward the pipeline. It eventually grows into one of the major rivers of the North Slope, and the main drainage to the west of the Sag, but where it crosses the road it's just a small grayling stream.

From Oksrukuyik Creek in Alaska

Stream photos

Featured on the forum

Re: Trico emergers
In the Mayfly Genus Tricorythodes by Bwoklink (Martinlf replied)

Re: Trico Tips
In the Mayfly Genus Tricorythodes by Martinlf

Re: UV spectrum and trout
In General Discussion by Martinlf

Re: closing the gender gap in flyfishing
In General Discussion by Konchu (Smallflyguy replied)

Re: Fishing Kupa River, Slovenia
In Fishing Reports by Slocum (Fish1 replied)

Psychodidae True Fly Larva Psychodidae True Fly Larva

Lateral view of a Psychodidae True Fly Larva from Mystery Creek #308 in Washington

This wild-looking little thing completely puzzled me. At first I was thinking beetle or month larva, until I got a look at the pictures on the computer screen. I made a couple of incorrect guesses before entomologist Greg Courtney pointed me in the right direction with Psychodidae. He suggested a possible genus of Thornburghiella, but could not rule out some other members of the tribe Pericomini.

8 Recently Added Photos

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.

What in the world are these things ?

Tuckcast has attached this picture to aid in identification. The message is below.

Tuckcast
Posts: 2

Tuckcast on Jul 14, 2019July 14th, 2019, 7:22 am EDT

I took these from the mouth of a trout I caught in Oil Creek in
NW PA. I occasionally find these in the mouths of fish in this stream. These bugs were out of water for about 8 hrs when I remembered about them. As soon
as I put them in water 2 of them just took off swimming. The 3rd one had expired. What Iâ€™d like to know is: Are these fish food or parasites of some sort? The large one is about a size 18 nymph hook.

Taxon

Site Editor
Plano, TX

Posts: 1311

Taxon on Jul 14, 2019July 14th, 2019, 2:44 pm EDT

Hi Tuckcast-

Welcome to this site, :-)

Best regards,
Roger Rohrbeck
www.FlyfishingEntomology.com

Millcreek
Healdsburg, CA

Posts: 344

Millcreek on Jul 14, 2019July 14th, 2019, 2:46 pm EDT

I think they may be Argulus americanus. It's a parasite. Further information can be found here;

https://www.google.com/search?q=argulus+americanus&tbm=isch&source=univ&sa=X&ved=2ahUKEwjlqZmv8bXjAhWLQs0KHTibAX4QsAR6BAgFEAE&biw=1536&bih=722&dpr=1.25#img

"If we knew what it was we were doing, it would not be called research, would it?"
-Albert Einstein

Tuckcast
Posts: 2

Tuckcast on Jul 15, 2019July 15th, 2019, 12:04 am EDT

Thanks so much for the ID. I
Guess I wonâ€™t bother trying to tie an imitation.

Blue-winged OlivesBaetis

Troutnut Forum › Get Bugs Identified › What in the world are these things ?