noun
eastern pale clouded yellow (butterfly)
A common yellow butterfly found in fields and gardens; the name is usually written in katakana.
春になると、モンキチョウが菜の花のまわりを飛び回る。
In spring, eastern pale clouded yellows flutter around the rapeseed flowers.
The name combines 紋 (pattern) and 黄蝶 (yellow butterfly), referring to the wing markings. The exact origin is uncertain, but it is a descriptive compound.