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Heliconius erato petiverana
A heliconiid butterfly with an orange stripe down its forewings, while the undersides show a white bar.
Rainforest and secondary forest, Central America to southern Brazil
According to Wikepedia H. erato has four red dots where the wing attaches to the thorax while H. melpomene has three. I am pretty sure I can see three here. However see discussion in the comment section! Thanks bayucca!
You are correct with the amounts of spots. But there is probably a fourth spot next to the upper, triangle-like spot. Definitely it is Erato due to the white stripe which passes the whole forewing til the margin. In Melpomene this stripe is interrupted.
Thanks Alice! What I like about those is the creased appeareance of the wings...like they've been ironed this way!