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

Salmonflies
Pteronarcys californica

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

Stream photos

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Male Baetidae (Blue-Winged Olive) Mayfly Dun Male Baetidae (Blue-Winged Olive) Mayfly Dun

Lateral view of a Male Baetidae (Blue-Winged Olive) Mayfly Dun from Mystery Creek #308 in Washington

This dun emerged from a mature nymph on my desk. Unfortunately its wings didn't perfectly dry out.

7 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 Ameletus suffusus (Brown Duns)

Where & when

In 10 records from GBIF, adults of this species have been collected during June (50%), April (20%), July (10%), March (10%), and May (10%).

In 1 record from GBIF, this species has been collected at elevation of 3500 ft.

Species Range

source

Map of specific collection sites

Specimens of the Mayfly Species Ameletus suffusus

1 Nymph

Male Ameletus suffusus (Brown Dun) Mayfly Nymph

8 Pictures

Dorsal view of a Male Ameletus suffusus (Ameletidae) (Brown Dun) Mayfly Nymph from the Cedar River in Washington

A few of these nymphs turned up in my kick net sample, with this being the only one fully mature and ready to emerge. It keys pretty straightforwardly to Ameletus suffusus, particularly because of the triangular dark patch on the labrum. The abdominal markings are close but don't quite match other drawings, likely just individual variation.

Collected July 1, 2021 from the Cedar River in Washington

Added by Troutnut on July 4, 2021

Collected July 1, 2021 from the Cedar River in Washington and added by Troutnut on July 4, 2021