Desc: Tui Chao: Directed by Chin-yuan Ke. The International Union for the Conservation of Nature (IUCN) was once considered as the expansive tidal flats connecting the Dadu and Zhuoshui River estuaries in southeastern Taiwan as one of Asia's most significant wetland areas and this area was once one of Taiwan's most important bird habitats. But the passage of time has increasingly distanced the local fishing villages from the sea and its sustenance.