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Euphydryas ? - Euphydryas anicia - male

Euphydryas ? - Euphydryas anicia - Male
Middle Fork of the Salmon River, Valley County, Idaho, USA
June 29, 2009
Among many swallowtails puddling on the riverbank was this one lone checkerspot.

definitely close
I think this is actually E. anicia. A photo of the upper side (if you have one?) might change my mind. The two look very similar on the under side, and there isn't enough showing of the upper side in your photo for that to help much.

Moved from ID Request.

I'm thinking ...
If not a beautiful Snowberry Checkerspot, something really close.

certainly has that same vivid color!

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