Giant swallowtail caterpillar (likely)

Citrus trees and other plants in the citrus family, including prickly ash and hoptree, especially in gardens, woodland edges, and open habitats.

Larvae chew leaves of Rutaceae plants, including citrus. Adults feed mainly on flower nectar and do not damage plants.

Young larvae resemble bird droppings; older larvae become green and may hide among foliage. When threatened, they extend a forked orange osmeterium that releases a strong odor; pupae overwinter in many regions.

Harmless to people and nonvenomous, though caterpillars can noticeably defoliate citrus plants. Adults are important pollinators and attractive native butterflies.