''Papilio thoas'', the king swallowtail or Thoas swallowtail, is a butterfly of the family Papilionidae. It is found in the southernmost United States, Mexico, Central America and South America . The species is easily confused with the giant swallowtail, which it closely resembles in both larval and adult stages. The caterpillars feed on the leaves of citrus plants . They have also been reported as feeding on a member of the genus ''Piper''.
Adult Thoas swallowtails fly year round in the.. more