noun
green-winged teal; Eurasian teal
A small dabbling duck, Anas crecca, common in Japan as a winter migrant. The name is often used in birdwatching and everyday contexts.
冬になると、この池にはコガモがたくさんやって来る。
In winter, many green-winged teals come to this pond.
コガモは小さくてかわいいカモです。
The green-winged teal is a small and cute duck.
Compound of 小 (ko, 'small') and 鴨 (kamo, 'duck'), literally 'small duck'. The name reflects its small size compared to other ducks.