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.

Stream photos

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Skwala (Large Springfly) Stonefly Nymph Skwala (Large Springfly) Stonefly Nymph

Dorsal view of a Skwala (Perlodidae) (Large Springfly) Stonefly Nymph from the Yakima River in Washington

This Skwala nymph still has a couple months left to go before hatching, but it's still a good representative of its species, which was extremely abundant in my sample for a stonefly of this size. It's obvious why the Yakima is known for its Skwala hatch.

6 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 Genus Fallceon (Blue-Winged Olives)

Species of the Fallceon genus can be identified by having typical Baetis dark or olivaceous coloration and the hooked process on its hind wings of Anafroptilum (prev. Centroptilum). This genus has only two species of possible interest to anglers:

Fallceon quilleri - a former species of Baetis that has had eight former Baetis species synonymized with it. It has a continental distribution.
Fallceon thermophilos - a former species of Baetis that has had one species from Baetis synonymized with it. It has a Northwest distribution.

Where & when

In 15 records from GBIF, adults of this genus have been collected during July (20%), September (20%), April (20%), August (13%), June (13%), May (7%), and March (7%).

In 119 records from GBIF, this genus has been collected at elevations ranging from 740 to 11401 ft, with an average (median) of 4938 ft.