But they are not only highly efficient swimmers. Compared with many other birds 'legs, ducks' legs are stocky and powerful, so that they can also walk and forage on land. Some duck species are rather trusting of mankind, and when they met with quick-witted humans long ago, they were gradually domesticated, to the great benefit of the human race.
其實鴨子不僅帶蹼的腳掌游泳「效率」很高，比起許多「鳥仔腳」，鴨腿渾圓有力，也能夠在地面上覓食棲居；傻鴨對人「懷疑度」又偏低，遇上腦筋轉得快的人類，遂成就了造福人群的家禽。