Papilio machaon - Young caterpillar, lateroventral

''Papilio machaon'', the Old World swallowtail, is a butterfly of the family Papilionidae. The butterfly is also known as the common yellow swallowtail or simply the swallowtail . It is the type species of the genus ''Papilio''. This widespread species is found in much of the Palearctic and in North America.