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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.

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.
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Mayfly Genus Dannella

Although Caucci and Nastasi write this genus off as unimportant in Hatches II, and most authors don't mention it at all, there are some who praise the localized hatches of Dannella simplex for providing good fishing.

Where & when

In 24 records from GBIF, adults of this genus have mostly been collected during July (42%), June (29%), August (13%), and April (8%).

In 10 records from GBIF, this genus has been collected at elevations ranging from 3 to 2559 ft, with an average (median) of 1901 ft.

Genus Range

Start a Discussion of Dannella


  • Caucci, Al and Nastasi, Bob. 2004. Hatches II. The Lyons Press.

Mayfly Genus Dannella

Species in Dannella: Dannella simplex
2 species (Dannella lita and Dannella provonshai) aren't included.
Genus Range
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