Pipevine swallowtail butterflies lay their eggs on pipevine (Aristolochia species), and the larvae dine on the plant but are not affected by the toxin, which then offers the adult butterfly protection against predators.
The larval host plants of these butterflies are small creepers and climbers of the family Aristolochiaceae such as Aristolochia indica, Aristolochia tagala and Thottea siliquosa.