In the mountainous highlands, cameras capture two endangered predators relying on a plentiful supply of lemmings.
Deep in the forest, a female bear and three cubs emerge in the sunshine after hibernation. The first priority for the mother is to find food, or her cubs will starve.
Far north in Svalbard, the polar bear depends on the ice to hunt seals. But with the ice receding, it has been forced to turn its attentions to a larger prey - the walrus.