noun
citrus swallowtail butterfly
A specific species of butterfly (Papilio xuthus), common in Japan. The name is usually written in katakana as a biological species name.
庭にナミアゲハが飛んできた。
A citrus swallowtail butterfly flew into the garden.
アゲハチョウ is the general term for swallowtail butterflies; ナミアゲハ refers specifically to the common citrus swallowtail species.
Compound of 並 (nami, 'common') and 揚羽 (ageha, 'swallowtail butterfly'), referring to the common swallowtail species. The exact historical derivation is uncertain, but the name reflects its prevalence.