FROM WIKIPEDIA, THE FREE ENCYCLOPEDIA The Scarce Swallowtail (Iphiclides podalirius) is a Palearctic swallowtail butterfly found in gardens, fields and open woodlands. First described by Linnaeus in 1758, it is found in places with sloe thickets and particularly orchards. It is also called Sail Swallowtail or Pear-tree Swallowtail. The Southern Swallowtail (Iphiclides feisthamelii), is sometimes treated as a subspecies. Despite the name ('scarce'), this swallowtail is quite common.