The Kamchatka brown bear also called Ursus arctos beringianus is closely related to the Alaskan brown bear. It can be found on the Kamchatka Peninsula, Karaginskiy Island, Shantar Islands, and Kuril Islands, in eastern Siberia. Kamchatka has one of the highest brown bear populations, with an average density of one brown bear per square mile. Brown bears are one of the most widely distributed large carnivores in the world. Male Kamchatka brown bears can reach a weight of 700 kilograms. Their large physical size is a result of their access to rich food sources like salmon, pine nuts and berries. Female brown bears in Kamchatka can begin to reproduce as early as 4 years of age and typically have litters of 2-3 cubs.