1. 色とりどりだが、主に黒と白の羽毛に赤いくちばしを持つマガモよりも僅かに大きい旧世界産のガンのようなカモ(Old World gooselike duck slightly larger than a mallard with variegated mostly black-and-white plumage and a red bill)
2. 端がぎざぎざの細長い鉤状のくちばしを持つ羽冠のある魚食性大型潜水ガモ(large crested fish-eating diving duck having a slender hooked bill with serrated edges)