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.

Stream photos

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Sweltsa (Sallfly) Stonefly Nymph Sweltsa (Sallfly) Stonefly Nymph

Dorsal view of a Sweltsa (Chloroperlidae) (Sallfly) Stonefly Nymph from the Yakima River in Washington

This species was fairly abundant in a February sample of the upper Yakima.

10 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.

Caddisfly Species Glossosoma alascense (Saddle-case Makers)

Where & when

Time of year : July

This is one of the most important western species of Glossosoma.

In 42 records from GBIF, adults of this species have mostly been collected during June (29%), August (21%), July (19%), April (19%), and May (7%).

In 9 records from GBIF, this species has been collected at elevations ranging from 3524 to 9239 ft, with an average (median) of 5873 ft.

Species Range

source

Map of specific collection sites

Specimens of the Caddisfly Species Glossosoma alascense

1 Male Adult

Male Glossosoma alascense (Saddle-case Maker) Caddisfly Adult

8 Pictures

Lateral view of a Male Glossosoma alascense (Glossosomatidae) (Saddle-case Maker) Caddisfly Adult from Rock Creek in Montana

I lost track of this specimen before I could get it under my microscope, but caddis expert Dave Ruiter was able to identify it from pictures as Glossosoma, with an uncertain suggestion of G. alascense as the most likely species.

Collected July 8, 2019 from Rock Creek in Montana

Added by Troutnut on July 18, 2019

Collected July 8, 2019 from Rock Creek in Montana and added by Troutnut on July 18, 2019