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The Corsican Swallowtail is endemic to the Mediterranean islands of Sardinia and Corsica. It occurs on open, rocky slopes where larval foodplants in the family Apiaceae are abundant (Aubert et al. 1996). Many hostplants are poisonous to livestock and are therefore subject to eradication efforts through controlled burns (Manil & Diringer 2003). Conversion of pastureland for recreational and economic developments further reduces the habitat for this species (Aubert et al. 1996). Due to its restricted range and sensitivity to changes in land use, Papilio hospiton was included in the list of endangered species issued by the Washington Convention (CITES 1973).