black-veined white (butterfly, Aporia crataegi)
A species of butterfly found in Japan and Eurasia; the Japanese name refers to its white wings with black veins.
In Hokkaido, the black-veined white butterfly is often seen in early summer.
Katakana spelling is standard for this butterfly species name; usually written in kana.
Kanji spelling is rare and mainly encountered in older or specialized texts.
The name エゾシロチョウ combines 蝦夷 (Ezo, old name for Hokkaido) with 白蝶 (white butterfly), referring to its white wings and northern distribution.