Endemic species include the Kouprey (Bos sauvelii), a rare wild ox, and the “Khting sipu” (Pseudonovibos spiralis). The most important wetland area in the country is Tonle Sap, which supports at least 115 species of plants and 850 species of fish. The wetland is also an important wintering and breeding ground for migratory birds, including the Eastern sarus crane, great adjutant and Asiatic black stork.