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Vanessa cardui
Difference in Vanessa cardui vs virginiensis is in the hind wing eyespots. The American has larger spots at the beginning and end of the row. Painted (cardui) are all even in size. This is easier to see from the ventral (underside) view. I always look at the hindwing dorsal or ventral for the ID. Compare with this link: http://www.butterfliesandmoths.org/speci... This photo those eyespots seem even to me.
Actually I agree with Sonia, look at the white spots at the top of the wings, on the American the second set spots are not white they ar more orange...
Yeah, it could be. They look nearly identical to me, but I agree with you.
Now, I think it's a ''Vanessa cardui'' because the distribution is more appropriate, what do you think?
Despite the name (according to wiki) this butterfly ' can be found throughout temperate North America as well as Madeira and the Canary Islands. Occasionally individuals can be found as far as south-west Europe.'