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I saw this relatively small butterfly (wings about 4 cm from tip to tip) on Kaledupa island in Indonesia. It was black with serrated wings that had white and red markings on the top and white markings on the underside.
I'm not sure Elsa, but here is a list of butterflies from South Sulawesi... maybe one of the genus Papilio? Good luck!
http://www.flmnh.ufl.edu/butterflies/neo...