Cressida cressida, the clearwing swallowtail or big greasy, is a Troidine swallowtail butterfly found in northern Australia, New Guinea, Maluku, and Timor. It is in the monotypic genus Cressida.

Remarkably, this species is not particularly closely related to other Asian swallowtails, but instead seems to be the closest living relative of the peculiar South American swallowtails of genus Euryades.

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