America’s northern border with Canada stretches 5,525 miles - the longest international boundary in the world. These borderlands encompass a remarkable range of habitats and weather extremes, from searing desert to freezing tundra, desolate grassland to lush rain forest, frigid ocean to freshwater lake. They are home to epic migrations and a surprising diversity of wildlife, where, for much of the route, nature’s inhabitants are only constrained by the challenges of the terrain and the changing seasons. But as we follow a year in the northern borderlands, we discover that even in the absence of a physical border, the political boundary poses many problems for wild residents.

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Produced in collaboration with Tamarin Productions Inc.