Figure 1. The Palamedes swallowtail butterfly is an obligate specialist on redbay trees, making laurel wilt a concern for the conservation of this species.
The left half of a panel image is a Palamedes swallowtail butterfly caterpillar on a leaf. On the right half of the image is an adult butterfly on a flowering host plant.

Johnny N. Dell, Bugwood.org (left); Jerry A. Payne, USDA Agricultural Research Service, Bugwood.org (right)