Being the main branch of the Tung Chung Valley, the deep-set Wong Lung Valley is the home of the Wong Lung Stream (The Yellow Dragon).
Tung Chung Stream is the only known Hong Kong site for the rare fish, Acrossocheilus (Lissolichthys) wenchowensis beijiangensis (北江光唇魚) and one of only two sites on Lantau where the locally rare Crested Kingfisher, Cervie lugubris, has been recorded.