The Siberian tiger (Panthera tigris altaica) is also known as the Amur, Manchurian, Altaic, Korean, North China or, Ussuri tiger. Though it once ranged throughout Western and Central Asia and eastern Russia, it is now completely confined to the Amur-Ussuri region of Primorsky Krai and Khabarovsk Krai in far eastern Siberia, where it is now protected. It is the biggest of the eight recent tiger subspecies and the largest living felid.