Discovered in 1992 in the Vietnamese region of Vũ Quang, Saola is one of the most endangered and rarest world's large mammals. They were observed for the second time in 1999 and again in 2010. Saolas are native to the Annamite Range in Vietnam and Laos and lives in numbers of several hundred, exclusively in the wild. In the press, saolas have been referred to as "Asian unicorns", an appellation apparently due to its rarity and reported gentle nature, and perhaps because both the saola and the oryx have been linked with the unicorn.