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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.

DayTripper's profile picture
Northern MI

Posts: 70
DayTripper on May 28, 2013May 28th, 2013, 4:32 pm EDT
Had a cloud of these flying over me for an hour or so last night while waiting for march browns. I was hoping for a female to go along with the males I was catching but it didn't work out. This guy was collected from the Au Sable system in northern MI. He is 12mm long. Two tails, hind wings are present. The only thing is I don't know if you could call the wings mottled, or does that only apply to the duns?

Whoops, tried uploading as an attachment but it isn't popping up after it uploads.


Crepuscular's profile picture
Boiling Springs, PA

Posts: 920
Crepuscular on May 29, 2013May 29th, 2013, 4:51 am EDT
Not Siphloplecton. Heptageniid of some type. grey fox spinner? Male M. vicarium would be my guess. But it may be some other Mccaffertium species. I'll defer to the experts. Here is a recent photo of a male Siphloplecton basale spinner http://www.troutnut.com/topic/7995/Springtime-fun
DayTripper's profile picture
Northern MI

Posts: 70
DayTripper on May 30, 2013May 30th, 2013, 4:14 pm EDT
Gracias, gentlemen. I actually considered vicarium and discounted it because of the color. Rookie mistake, I guess.

Plenty more photos where that came from. All sorts of angles, etc. Just gotta edit.

Thanks again,

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