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Junonia sp.
I think this butterfly had a wing span of about 3cm.
You just take the names I suggested: Common name = "Buckeye", scientific name = "Junonia sp.". xy sp. means, that you have the genus but not the species which would be the second part of the scientific name. You should always consider, that if you have "wrong" or unprecise ID your picture will always shown if you google the name. That's why it is important to update your ID or if you are not 100% sure about the ID you just note the genus or when it is even more tricky the family (for example: Pentatomidae for Stink Bugs and Shield Bugs).
Thanks for the explanation. So, in such a case, what do I do (new to Project Noah...)? Do I remove the genus classification?
Ubnfortunately it is not possible to (seriously) separate Junonia evarete from Junonia genoveva. Geogarphical range fits for both and there are long-lasting discussion about the criteria to separate them. According to Andrew Neild it would only be the underside of the tip of the antennae, which is not clearly visible. See some comment of others. I first IDed one also as Evarete, but today I would not make any ID on these ones, unless it is very clear.
http://www.projectnoah.org/spottings/926...
http://www.projectnoah.org/spottings/987...
http://www.learnaboutbutterflies.com/And...