Like other migratory fowl, the ducks come south to Taiwan every year following the northeast seasonal winds, and they prepare to return home between March and May, when the weather gradually warms and the wind starts to blow out of the southwest.
和其他候鳥一樣，當東北季風刮起，水鴨就順著風勢，從西伯利亞、大陸東北等地區，向南移棲；三至五月間，天氣漸暖，西南氣流增強，就是他們準備歸鄉的季節。