Lateral view of a Female Hexagenia limbata (Ephemeridae) (Hex) Mayfly Dun from the Namekagon River in Wisconsin

Hex Mayflies
Hexagenia limbata

The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.

Upper Titcomb Lake

From Titcomb Basin in Wyoming

Stream photos

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Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva Clostoeca disjuncta (Northern Caddisfly) Caddisfly Larva

Lateral view of a Clostoeca disjuncta (Limnephilidae) (Northern Caddisfly) Caddisfly Larva from the Yakima River in Washington

This one was surprisingly straightforward to identify. The lack of a sclerite at the base of the lateral hump narrows the field quite a bit, and the other options followed fairly obvious characteristics to Clostoeca, which only has one species, Clostoeca disjuncta.

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.

Mayfly Species Baetis magnus (BWOs)

This large western baetid is in the Rhodani group of closely related species that could probaly also be called the Baetis tricaudatus species complex. Besides its large overall size, large hind wings (for a baetid) with rounded margins and dark lateral bands of pigment on the abdomen are are also characteristic.

Where & when

In 11 records from GBIF, adults of this species have been collected during March (36%), May (27%), June (18%), July (9%), and April (9%).

In 14 records from GBIF, this species has been collected at elevations ranging from 3451 to 9318 ft, with an average (median) of 6207 ft.

Species Range

source

Map of specific collection sites

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