1. The saola (Pseudoryx nghetinhensis), also called siola, Vu Quang ox, spindlehorn, Asian unicorn, or, infrequently, the Vu Quang Bovid, is one of the world's rarest large mammals, a forest-dwelling bovine found only in the Annamite Range of Vietnam and Laos.Related to cattle, goats, and antelopes, the species was described following a discovery of remains in 1992 in Vũ Quang Nature Reserve by