The Sumatran Rhinoceros, the only surviving member of Dicerorhinus and the only rhino species still covered in long hair!

And not all individuals sport this hairy trait.  It's like a throwback to the Pleistocene.

The Sumatran rhinoceros is believed to be closely related to the extinct woolly rhinoceros (Coelodonta antiquitatis). The woolly rhinoceros, so named for the coat of hair it shares with the Sumatran rhinoceros, first appeared in China; by the Upper Pleistocene, it ranged across the Eurasian continent from Korea to Spain. The woolly rhinoceros survived the last Ice Age, but, like the woolly mammoth, most or all became extinct around 10,000 years ago.