Troutnut.com Fly Fishing for Trout Home
User Password
or register.
Scientific name search:

Hesperoperla pacifica (Golden Stone) Stonefly Adult Pictures



 I collected this specimen as a nymph and had it in line to be photographed, but it emerged inside my holding container before I got the chance. However, I was able to get some interesting photos of the very freshly-emerged adult that really demonstrate how strikingly colors can change within a few short hours after emergence. The before-and-after pictures are combined here under a single specimen since they portray the same individual at different times within the same stage.

Based on the identification of another specimen from the same date/site, I'm calling this Hesperoperla pacifica.


This stonefly was collected from the Gallatin River on July 2nd, 2019 and added to Troutnut.com on July 18th, 2019.


Start a Discussion of this Adult:

You must log in at the top of the page to post. If you haven't registered yet, it's this easy:

Username:          Email:

Password:    Confirm Password:

I am at least 13 years old and agree to the rules.
Top 10 Fly Hatches
Top Gift Shop Designs
Top Insect Specimens
Miscellaneous Sites