OK, so the saola, also known as the Asian unicorn, isn't a mythical creature but it's certainly close! One of the world's rarest mammals, this animal has only been seen in the wild four time since its discovery two decades ago.
The saola was discovered in 1992 when scientists spotted three skulls, with the saolas' trademark long horns, in the homes of local hunters. Despite many attempts, no saola has been sighted in the wild by a scientist. The only saola to be captured died while in captivity, before scientists could study it and release it back to the wild.
Found only in regions of Vietnam and Laos, the saola is a shy creature that stays in its natural habitat in the forests, never going close to farmed fields or villages. A member of the bovine family, the saola is a lives on a diet of small, leafy plants.