How to identify it?
Larva
Larva bright green, with a greyish-white annular stripe and a black annular stripe behind thorax. Behind the head is an orange stink gland, extending out when frightened.
Adult
Adult has a pair of clavate antennae on the head. Compound eyes black. Siphoning-sucking mouthparts. 2 pairs of scaly wings and 3 pairs of legs attached to thorax.

Scientific Classification

Phylum
Arthropods Class
Bugs Order
Moths and butterflies Family
Swallowtail butterflies Genus
Swallowtails Species
Western tiger swallowtail