Saola was first discovered in Vietnam in May 1992 during a survey conducted by the Ministry of Forestry of Vietnam and the World Wide Fund for Nature (WWF) in Vu Quang National Park. Later, saola was also found elsewhere in the range of Truong Son forest in Nghe An, Ha Tinh, Thua Thien-Hue, Quang Nam and many provinces of Laos.
Saola is about 1.3 to 1.5 m long, 90 cm high and weighs about 100 kg. Dark brown skin, white spot on each nail. The saola’s horns are long and slender, pointing straight back, and can be up to 51 cm long.
Saola live in wet evergreen or deciduous forests in eastern Southeast Asia, preferring river valleys. Sightings have been reported from steep river valleys at 300–1,800 metres (980–5,910 ft) above sea level. In Vietnam and Laos, the species’ range appears to cover approximately 5,000 km2 (1,900 sq mi), including four nature reserves. During the winters, it migrates to the laowlands. In the northern Annamite Mountains, it was sighted mostly near streams at elevations of 592–1,112 metres (1,942–3,648 ft). In winter, saola will migrate to lower lands to avoid cold. Based on the body of a saola found in 1996, scientists predict that the saola’s spawning time is around May to early June.
According to Wikipedia.