1. Russian Far East: This is the main habitat of Siberian tigers. It covers the Amur-Heilong region, which includes parts of eastern Russia and northeastern China. The forests of the Sikhote-Alin Mountains and the Ussuri River Basin are particularly important for Siberian tigers.
2. Northeast China: Siberian tigers also inhabit some areas of northeastern China, particularly the Jilin and Heilongjiang provinces. They can be found in the Changbai Mountains and the Songhua River Basin.
3. Mongolia: A small population of Siberian tigers can be found in the eastern parts of Mongolia, especially in the Khentii Mountains.
4. North Korea: There have been occasional reports of Siberian tigers in the mountainous regions of North Korea, but their presence is rare and not well-documented.
5. Captivity: Siberian tigers are also kept in zoos and wildlife parks around the world for conservation and educational purposes. These captive tigers receive specialized care and live in controlled environments that mimic their natural habitats as much as possible.
It's worth noting that Siberian tigers prefer temperate and cold climates with abundant forests, prey species, and minimal human disturbance. They are territorial animals and require large home ranges to survive and thrive. As such, their distribution and survival are influenced by the availability of suitable habitats and conservation efforts in these regions.