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.

Inlet of Upper Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva Glossosoma (Little Brown Short-horned Sedge) Caddisfly Larva

Dorsal view of a Glossosoma (Glossosomatidae) (Little Brown Short-horned Sedge) Caddisfly Larva from the Yakima River in Washington

I caught this tiny larva without a case, but it seems to key pretty clearly to to Glossosomatidae. From there, the lack of sclerites on the mesonotum points to either Glossosoma or Anagapetus. Although it's difficult to see in a 2D image from the microscope, it's pretty clear in the live 3D view that the pronotum is only excised about 1/3 of its length to accommodate the forecoxa, not 2/3, which points to Glossosoma at Couplet 5 of the Key to Genera of Glossosomatidae Larvae.

11 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.

Need help..

Nightangler
Branson Missouri

Posts: 1

Nightangler on Sep 15, 2006September 15th, 2006, 6:04 am EDT

First off...

Very nice site Jason!!

next...

I would like alittle thinking of a good night time pattern for the White Miller (Nectopsyche albida )... I seen a few hatching... and the fish are hitting on white woollies buggers... I think if I got closer to the fly itself.. Id pick up alot more fish...

Any thoughts on a fly to tye??

GONZO
Site Editor
"Bear Swamp," PA

Posts: 1681

GONZO on Sep 16, 2006September 16th, 2006, 9:29 am EDT

Here are a few simple flies you might try--

For active (skittering) adults: Try a white Elk-Hair Caddis, (+/-) #14. If you are tying your own, you might want to add a very pale green body and a light ginger or cream hackle under the light elk- or deer-hair wing.

For spent (flush in the film) adults: Use the same pattern minus the palmered hackle (or just fish the above fly untreated and soggy).

For submerged (drowned or diving) adults: The classic White Miller wet fly works (but add a pale green body if tying your own).

For emerging pupa: You probably won't find a commercial pattern to match the pupa; so tie a soft-hackle style with a pale green (or cream) body ribbed with pearl Krystal Flash, a tan shoulder (thorax) and a collar of the palest partridge you can find.

Good Luck!