noun
Japanese wood ant; Formica japonica
A common black ant species found in Japan. The name literally means 'black mountain ant'.
公園でクロヤマアリの行列を見つけた。
I found a line of Japanese wood ants in the park.
Katakana spelling is common for this species name; usually written in kana.
Kanji spelling is rare; the word is usually written in kana.
Compound of 黒 (kuro, 'black'), 山 (yama, 'mountain'), and 蟻 (ari, 'ant'). The derivation is transparent; the name describes the ant's appearance and habitat.