Header image
Salmonflies
Pteronarcys californica

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

Rhithrogena morrisoni (Western Black Quill) Mayfly Nymph Pictures

Size - (excluding tails) - 12 mm
Status at time of photo - preserved, but photographed within days of capture.

W. C. Day, Aquatic Insects of California differentiates morrisoni nymphs by submedian pale dots on tergites 8 & 9, which look to be in evidence. This is one of the "super-hatches" on this river that can be prolific March through April.

Entoman

This mayfly was collected from the Lower Yuba River in California on March 3rd, 2011 and added to Troutnut.com by Entoman on November 1st, 2011.

Start a Discussion of this Nymph:

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

Troutnut.com is copyright © 2004-2023 (email Jason). privacy policy