According to biologists' observation, about 2% of the wild tiger's diet consists of brown bears and black bears, with brown bears (Siberian brown bears) as the main species and black bears as the second.

So, from the point of view of the two sides of the "war", the tiger is able to hunt and kill with close to or smaller than their own size of brown bears, and similarly, as long as the brown bears have enough size advantage, they are even able to kill the northeast tiger.