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.

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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.

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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.

Little White-winged Black

Female Tricorythodes (Trico) Mayfly Spinner

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Lateral view of a Female Tricorythodes (Leptohyphidae) (Trico) Mayfly Spinner from the Neversink River in New York

I photographed this Trico alive, although it didn't have much time left. These things die very quickly after they mate and it's hard to rush them back to the studio.

Collected September 7, 2006 from the Neversink River in New York

Added by Troutnut on October 4, 2006

Collected September 7, 2006 from the Neversink River in New York and added by Troutnut on October 4, 2006

Jack_k
las vegas,nv

Posts: 4

Jack_k on Mar 14, 2009March 14th, 2009, 7:45 pm EDT

These Tricos are found on most reservoirs in the Great Basin. They come off the water late in the afternoon and early evening. They pull out of their subimago shuck on any object, cars, shirt sleeves, eye glasses, or rocks. They appear as clouds on most reservoirs and stimulate an Alfred Hitchcock-like feeding frenzy with the fish. They are short lived but what an impact. This hatch lasts for several weeks here in the Great Basin.
A good spent wing example can be found at Just2ty4.com.

Martinlf