10/06/2026
We recently received a call to help identify a caterpillar feeding on the foliage of a citrus tree. The culprit turned out to be the orange dog caterpillar, the larval stage of the Giant Swallowtail butterfly (Papilio cresphontes). While these caterpillars can feed on citrus and other members of the citrus family, they eventually develop into one of the largest and most striking butterflies found in Louisiana.
Young orange dog caterpillars have a unique appearance that helps protect them from predators. Their mottled brown and white coloration resembles bird droppings, making them difficult to spot. Although they may cause some defoliation, healthy, established citrus trees can typically tolerate light feeding without long-term damage. As adults, Giant Swallowtail butterflies serve as important pollinators and contribute to the diversity of beneficial insects in the landscape.
Fortunately, the local resident contacted the Extension office before taking any action. This allowed us to discuss management options to relocate the caterpillars to reduce feeding damage on the young citrus tree while preserving the developing butterflies. By taking a balanced approach, homeowners can protect their plants while also supporting beneficial insects and local biodiversity.
