The last surviving herd of wild buffaloes in Nepal is found here. Other species include wild boar, hog deer, spotted deer and blue bull called nil gai. A total of 280 species of birds, including ducks, ibises, egrets, herons and floricans, are recorded here. This area is extremely important for migratory birds. Other animal species include the crocodile, gharial and the Gangetic dolphins.
Commercial fishing is also an important activity here.