This forested park rises from the Mekong river lowlands eastwards into the Bolaven Plateau.

In 1950 the Dong Hua Sao Forest Reserve was declared, covering 260 square kilometres (100 sq mi).

Bird life includes the grey-faced tit-babbler, found only in Indochina, and rare hornbills.

[2][3] The wetlands are home to the Siamese crocodile, hog deer and green peafowl, all endangered.

Other threats include destructive fishing practices, hunting, overcollection of forest products and use of wetlands for agriculture and fisheries.