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.

A trackless paradise two days deep in the Yellowstone backcountry

From Mystery Creek # 218 in Wyoming

Stream photos

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Doroneuria baumanni (Golden Stone) Stonefly Nymph Doroneuria baumanni (Golden Stone) Stonefly Nymph

Dorsal view of a Doroneuria baumanni (Perlidae) (Golden Stone) Stonefly Nymph from Swauk Creek in Washington

I'm not aware of any way to tell the two species of Doroneuria apart as nymphs, so this one is classified to species based on location alone. Doroneuria baumanni is found in the Cascades and in Washington, and the other species is not known here yet.

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 Genus Ironoquia (Eastern Box Wing Sedges)

Where & when

Time of year : Fall

These species enter diapause during the summer to synchronize their fall emergence.

In 61 records from GBIF, adults of this genus have mostly been collected during September (34%), August (28%), October (23%), and July (8%).

In 21 records from GBIF, this genus has been collected at elevations ranging from 16 to 4117 ft, with an average (median) of 2592 ft.

Genus Range

source

Map of specific collection sites

Egg-Laying behavior

Time of day: Evening; earlier when cooler

Larva & pupa biology

Diet: Leaves, algae

Specimens of the Caddisfly Genus Ironoquia

1 Adult

Ironoquia lyrata (Eastern Box Wing Sedge) Caddisfly Adult

10 Pictures

Artistic view of a Ironoquia lyrata (Limnephilidae) (Eastern Box Wing Sedge) Caddisfly Adult from the Teal River in Wisconsin

The setae on the wings make it a big tricky to identify this caddisfly from the "splayed wings" view because they obscure the venation, but several of the side views provide a good look at the important forewing veins. It keys pretty confidently to Ironoquia. Based on species ranges and a photo on BugGuide seemingly of this species and some alternatives, it seems Ironoquia lyrata is by far the most likely option.

Collected June 11, 2021 from the Teal River in Wisconsin

Added by Troutnut on June 14, 2021

Collected June 11, 2021 from the Teal River in Wisconsin and added by Troutnut on June 14, 2021