Wolves and Bison
Predator and Prey
Each spring, animals travel up from the south to be ready for the rich grazing that will be unveiled by the spring melt. For the caribou the timing is critical, arrive too early and a winter storm could kill you, delay it too long and you may fail to lay down the fat needed to survive a polar winter.
Further south still, and stooped, shrouded figures end the flat monotony of the tundra.
This is the tree line, the first place on our journey with sufficient warmth and liquid water to enable a tree to grow. Surviving here is so crushingly difficult that it can take hundreds of years for a seedling to grow into a stunted shrub. But, even small trees can provide cover for a predator. - Wolves.
These, in northern Canada are the largest and most powerful wolves in the world, and they are setting out to hunt. The pack is 25 strong, a sign that the prey they are seeking is formidable. Bison.
Bison Herded by Wolves
These Bison are even bigger than their southern cousins, the largest land animals in North America. For generations Wolves and Bison, here, have been shaped by their battles with each other, making each the most impressive of its kind..