Large Western Speckle-wing - Callibaetis californicus |

Female. Long Beach
© Chris Mallory

Large Western Speckle-wing (Callibaetis californicus)

Arthropoda > Insecta > Ephemeroptera > Baetidae

Recorded throughout California through much of the year (excluding winter). In Southern California the majority of records come from moderately low elevation (under 2000 feet) localities southwest of the transverse ranges, with scattered desert records including Zzyzx Spring and Palm Desert. The species has also been recorded from Santa Cruz Island. Note in particular the unmarked abdomen of the male compared to C. pictus.

1. M. D. Meyer and W. P. McCafferty. Mayflies (Ephemeroptera) of the Far Western United States. Part 3: California (2008)
2. Schwiebert, Ernest G. Nymphs Volume 1: the Mayflies: The Major Species (2007)

View Sightings (3 total, most recently on 10/05/2014)

Submit a sighting:
Encounter this species recently? Click here to submit a record to let others know which animals are active right now.You must be logged in to record recent sightings. is built and maintained by Chris Mallory. All contributed content on this site is copyrighted by its respective owner, all rights reserved. All species IDs on this site should be treated as tentative and are presented here to help Southern California naturalists better understand the world around them, not to serve as a definitive authority of information. If you find any information presented here to be in error, or if you wish to send feedback positive or negative do not hesitate to email me. This site runs best on either Mozilla Firefox or Google Chrome.
Terms of Service