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Artistic view of a Male Pteronarcys californica (Pteronarcyidae) (Giant Salmonfly) Stonefly Adult from the Gallatin River in Montana
Pteronarcys californica

The giant Salmonflies of the Western mountains are legendary for their proclivity to elicit consistent dry-fly action and ferocious strikes.

Ventral view of a Hydropsyche (Hydropsychidae) (Spotted Sedge) Caddisfly Larva from the Yakima River in Washington
With a bit of help from the microscope, this specimen keys clearly and unsurprisingly to Hydropsyche.
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 Ephemerella mucronata

Where & when

In 6 records from GBIF, adults of this species have been collected during April (33%), May (33%), September (17%), and March (17%).

In 271 records from GBIF, this species has been collected at elevations ranging from 7 to 4892 ft, with an average (median) of 1427 ft.

Species Range

Specimens of the Mayfly Species Ephemerella mucronata

1 Nymph

Start a Discussion of Ephemerella mucronata


Mayfly Species Ephemerella mucronata

Species Range
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