The Siberian tiger (Panthera tigris tigris) is the largest species among the Felidae, measuring close to 4 meters long, weighing at around 850 pounds, and classified in the genus Panthera. It is most recognizable for its dark vertical stripes on reddish-orange fur with a lighter underside. It is an apex predator, primarily preying on ungulates such as deer and bovids. It is territorial and generally a solitary but social predator, requiring large contiguous areas of habitat, which support its requirements for prey and rearing of its offspring. Siberian tiger cubs stay with their mother for about two years, before they become independent and leave their mother's home range to establish their own. In addition to being the largest, the Siberian tiger is also the strongest Holocene cat in the world.

In the second episode of Walking with Cavemen, one sees a group of Homo habilis and a group of Homo rudolfensis fighting over its prey, and it uses this commotion to kill the old leader of the Homo habilis gang. Later on, however, the new leader of the Homo habilis group unites them to drive away the tiger instead.

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