noun
large grass yellow; common grass yellow
Specific butterfly species, Eurema hecabe; used in biological or nature contexts.
キチョウは日本全国で見られる黄色い蝶です。
The common grass yellow is a yellow butterfly found throughout Japan.
noun
yellow butterfly
General term for any yellow butterfly; less precise than the species-specific sense.
庭に小さなキチョウが飛んできた。
A small yellow butterfly flew into the garden.
From 黄 (ki, 'yellow') + 蝶 (chō, 'butterfly'). The reading きちょう is a standard compound reading.