noun
wood duck; Carolina duck
A North American duck species (Aix sponsa) known for its colorful plumage. In Japanese, usually written in katakana as アメリカオシ.
アメリカオシは北米に生息する美しい水鳥です。
The wood duck is a beautiful waterfowl native to North America.
オシドリ (mandarin duck) is a similar-looking East Asian duck, while アメリカオシ is the North American wood duck.
From アメリカ (America) + オシ, an abbreviation of オシドリ (mandarin duck), referring to its resemblance to that species.