Papilio demolion, the banded swallowtail, is a species of swallowtail butterfly belonging to the family Papilionidae.
This species is present in Brunei, Cambodia, Laos, Singapore, Thailand and Vietnam. These butterflies mainly inhabit nature reserves, wastelands, mangrove areas and offshore islands.
Adults can be found from January to October. Females lay their eggs in a long string. Eggs hatch in about 3–4 days.
