large grass yellow; common grass yellow
Specific butterfly species, Eurema hecabe; used in biological or nature contexts.
The common grass yellow is a yellow butterfly found throughout Japan.
yellow butterfly
General term for any yellow butterfly; less precise than the species-specific sense.
A small yellow butterfly flew into the garden.
Usually written in katakana as a species name; the kanji form 黄蝶 is less common.
Kanji spelling is understandable but rarely used; katakana is preferred.
From 黄 (ki, 'yellow') + 蝶 (chō, 'butterfly'). The reading きちょう is a standard compound reading.