A specialised Longwing. The caterpillar of this species breeds on just one species of Passion Vine called Pittier's Passion Vine. There are actually only a few species of butterfly that use just one plant species as their caterpillar plant. This is probably due to a higher rate of extinction of such species compared with other butterflies that don't put all their eggs in one basket, or one plant as in this case. If the plant goes extinct the butterfly will surely follow.