florida33girl I agree - Heraclides cresphontes. See this site for confirmation: http://www.neotropicalbutterflies.com/Site%20Revision/Pages/Swallowtail%20pages/Heraclides_thoas.html.
bayucca It is the other one, Cresphontes, which has only 3 spots and some spiky patches on the forewing.
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