gadwall
A species of dabbling duck (Mareca strepera, formerly Anas strepera). Common in field guides and ornithological contexts.
The gadwall is a species of duck that breeds in temperate regions of the Northern Hemisphere.
Standard katakana spelling for this bird species.
Kanji spelling is rare; the bird name is almost always written in katakana.
Formed from オカ and ヨシガモ, the Japanese name of the falcated duck. The original motivation for オカ is uncertain.