柯林斯詞典mallard /?m?lɑ?d/ (mallards) 1. N-COUNT A mallard is a kind of wild duck that is very common. 野鴨 返回 mallard劍橋詞典a wild duck that is common in Europe and North America 綠頭鴨（常見于歐洲和北美的一種野鴨） The male mallard has a green head and reddish-brown chest . 雄性綠頭鴨的頭部呈綠色，胸部呈棕紅色。 返回 mallard