A suitable ecological environment is one of the reasons why the ducks choose to stay in the area. But there are a number of similarly suitable environments on Taiwan's western coast, so why do they mostly gather at Hwachiang Bridge?
生態環境適合，是水鴨選擇棲息的原因之一；但是，台灣西部沿岸適合水鴨棲息的環境也不少，為何會大都集中在華江橋畔？