Black Swallowtail

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Papilio polyxenes

Black Swallowtail, a reference photo
Photo: D. Gordon E. Robertson · CC BY-SA 3.0 (licence)

Papilio polyxenes, the (eastern) black swallowtail, American swallowtail or parsnip swallowtail, is a butterfly found throughout much of North America. An extremely similar-appearing species, Papilio joanae, occurs in the Ozark Mountains region, but it appears to be closely related to Papilio machaon, rather than P. polyxenes. The species is named after the figure in Greek mythology, Polyxena (pron.: /pəˈlɪksɨnə/; Greek: Πολυξένη), who was the youngest daughter of King Priam of Troy. Its caterpillar is often called the "parsleyworm" because the caterpillar feeds on parsley.

From Wikipedia, under CC BY-SA 4.0.

Is it venomous or poisonous?

We have no record of Black Swallowtail being toxic, poisonous or venomous. That is not proof that it is safe. Never eat, touch or handle a wild plant, mushroom or animal on the strength of an identification; ask someone qualified.

Easily confused with

Classification

Kingdom
Animalia
Phylum
Arthropoda
Class
Insecta
Order
Lepidoptera
Family
Papilionidae
Genus
Papilio
Species
Papilio polyxenes

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