noun
satyrid butterfly; grayling
Refers to butterflies of the subfamily Satyrinae, especially the dryad (Minois dryas). The name comes from the eye-like spots on the wings resembling a snake's eye (蛇の目).
ジャノメチョウは草地でよく見られる。
Satyrid butterflies are often seen in grasslands.
ジャノメチョウの羽には蛇の目のような模様がある。
The satyrid butterfly has snake-eye-like patterns on its wings.
蛇の目 means 'snake eye' and refers to the circular pattern; ジャノメチョウ is the butterfly named after this pattern.
From 蛇の目 (janome, 'snake eye') + 蝶 (chō, 'butterfly'), referring to the eye-like spots on the wings.