These days, the immense water current from the upstream rushing to tràm chim (the area with a broad variety of precious birds of conservation value) located next to the O Lau River flowing through Quang Thai Commune (Quang Dien District, 15km from Hue City) signals that many precious birds from everywhere fly in to shelter. It is called tràm chim because this area is recognized to have a wide variety of precious birds of conservation value.