High Quality Content by WIKIPEDIA articles! The Palu Swallowtail (Atrophaneura palu) is a species of butterfly in the Papilionidae family. It is endemic to the Indonesian island of Sulawesi. Its name is a reference to Palu, as the type specimen was captured in the highlands near the city, but it is also known from lower altitudes in the region. It is poorly known and has been regarded as a subspecies of Atrophaneura coon.