The Swallowtail is the U.K's largest native butterfly, and also one of it's rarest. Papilio machaon.

- Image ID: DBY1TB

The Swallowtail is the U.K's largest native butterfly, and also one of it's rarest. Papilio machaon.

MERVYN REES / Alamy Stock Photo

Image ID: DBY1TB

Location: Norfolk, United Kingdom