The name Amur, Manchurian, Altaic, and Korean, north china, or ussuri tiger also know the Siberian tiger (panthera Tigris altaica). The western and central Asia and eastern Russia were the once the habitat of the Siberian tiger. Today it is restricted to the Amur-ussuri region of primorsky krai and Khabarovsk drai in far eastern Siberia. Among the nine recent tigers the Siberian, tigers are the biggest one. The 2009 genetic research results that the Siberian tiger's population is same as the population of the Caspian tigers.