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Heliconius sara
Yep, identifying Heliconius butterflies its a nightmare!. There are many species mimetizing each other and they look almos identical.
Probably that's why I'm a bee specialist.
Juan, the exact photo is in: Butterflies and Moths of Costa Rica, Charon y Montero, 2007, lamina (plate)127.
mmm, I'm not sure. This butterfly was identified by Annette Aiello, and she is an specialist working for Smithsonian