Oregon_swallowtail
Papilio machaon oregonius
Subspecies of swallowtail butterflies
The Oregon swallowtail (Papilio machaon oregonius, sometimes classified as Papilio oregonius or Papilio bairdii oregonius[1]) is a subspecies of swallowtail butterfly native to the United States of America, Oregon, Washington, and Idaho and south-central British Columbia in Canada.[2] In 1976, it became one of the first four butterflies that the United States Postal Service placed on a U.S. stamp.[3]
The Oregon swallowtail was declared the state insect of Oregon in 1979 by the Legislative Assembly.[4][5]