Home / Swallowtail (Papilionidae) / Old World Swallowtail (Papilio machaon)

Old World Swallowtail (Papilio machaon)

Old World SwallowtailThe Old World Swallowtail is a species of very brightly-colored, medium-sized butterflies that are found in the entire Palearctic region in 37 recognized subspecies.

This member of the swallowtail butterfly family has not been noted as of concern; however, it is relatively rare or uncommon.

Scientific Classification


  • Family: Papilionidae
  • Genus: Papilio
  • Common names: Common yellow swallowtail, swallowtail
  • Scientific Name: Papilio machaon

Description and Identification

Caterpillar

The mature larva has a soft green body, with each segment divided by black lines. The segments also have alternate dots of black and yellow, rendering them a very bright coloration.

Pupa

 

The chrysalis of this swallowtail butterfly is light brown and dark gray with whitish marks and spots throughout the body, enough to camouflage in the twigs and branches in the wild.Old World Swallowtail Pupa

Adult Butterfly

Sexual Dimorphism: Not present

Color and Appearance: When the wings are open, the dorsal side of the hindwings has reddish-orange eyespot close to the tail with black along the lower border that touches the inner edge of the pair of hindwings, which also has circular blue marks along the border. The forewings primarily have a white base with vein-like markings in dark gray. When the wings are closed, it is primarily white with the impression of the vein-like marks similar to the dorsal side. The ventral side also bears the two orange marks at the lower tips of the hindwings.

Papilio machaon

Average wingspan: 2½ – 3 inches (6.5 – 7.5 cm)

Flight pattern: Moderate

Eggs

Old World Swallowtail Eggs

White to reddish white, laid singly on host plant

Quick Facts

Distribution From Russia to China, Japan, Taiwan, parts of India (including the Himalayas), and across Alaska, Canada, and the United States
Habitat Sunny open lands, forest edges, gardens
Lifespan of adults Varies between subspecies
Host plants Milk parsley (or, marsh hog’s fennel) is normally the only food plant
Adult diet Flower nectar

Did You Know?

  • The specific name machaon comes from the Greek character Machaon, a son of Asclepius, in the works of poet Homer.
  • Though the term ‘Swallowtail’ is a common name applied to all members of the family, this species was the first to get the name.
  • The Old World Swallowtail is the type species of the entire genus Papilio.
  • It is the largest resident butterfly of UK.

Female Old World Swallowtail

Male Old World Swallowtail

Old World Swallowtail Habitat

Common Yellow Swallowtail

Old World Swallowtail Images

Old World Swallowtail Pictures

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Scientific Classification

  • Family: Papilionidae
  • Genus: Papilio
  • Common names: Common yellow swallowtail, swallowtail
  • Scientific Name: Papilio machaon
Published by Avatar on December 24, 2018.
Last Updated: October 3, 2023. ✅ Verified by: Butterfly Team