A kouprey (Bos sauveli, from Khmer: គោព្រៃ, Khmer pronunciation: [koː prɨj], "wild ox"; also known as kouproh, "grey ox"), is a wild, forest-dwelling bovine species found mainly in northern Cambodia, but also believed to exist in southern Laos, western Vietnam, and eastern Thailand. It became known to zoologists in 1937.