Zerynthia polyxena, also called Southern Festoon or Osterluzeifalter is a very  charming butterfly from Palaearctic ecozone (Europe). The first description was in 1775 by Denis & Schiffermüller. With a wingspan of 4.5 – 5.5 cm the Southern Festoon is a small member of the family PAPILIONIDAE. The butterfly is yellow with black, red and blue spots and a black sinuous line at the margin.