steamer duck
noun
1- a sturdily built greyish duck which churns the water with its wings when fleeing danger, typically flightless and native to southern South America船鸭。
1.1
- Genus Tachyeres, family Anatidae: several species, including the flightless T. brachypterus of the Falkland Islands.船鸭属, 鸭科：数种, 包括福克兰群岛的不能飞行的短翅船鸭。