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ID for a Sulfur #1? - Colias harfordii - male

ID for a Sulfur #1? - Colias harfordii - Male
Claremont, Los Angeles County, California, USA
June 18, 2011
This sulfur was spotted on Deerweed (Acmispon glaber) at the Claremont Colleges' Robert J. Bernard Field Station. After studying the BugGuide photos and information for Sulfurs, I can only conclude that I'm certain that I can't reliably tell them apart, so any information will be greatly appreciated!

seemed odd that there are so few Harford's Sulphurs
posted on BugGuide, since they are so common in southern California; so, I went looking through the other species to see if any are hiding. This one looks like it is indeed a male Colias harfordii.

Moved from Orange Sulphur.

David, your remark jogged my memory
that I had at least one of those sitting in a file.

Thanks so much!
Thanks so much! It’s great that someone keeps an eye out for these things. Colias harfordii will be a new addition to our field station invert list. I had been wondering just lately if it was there, and it turns out that we already have a photo.


This is Colias eurytheme -
the Orange Sulphur. Found in many places, year-round. Larval foodplants are Fabaceae such as Alfalfa, Medicago sativa, and yes, Lotus scoparius, +++

Thanks, Hartmut! That certainly seemed the most likely. Colias eurytheme is already on the field station invert list, but it will be nice to add a photo.

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