Photo By Chris Linder Hornstrandir Nature Reserve is a roadless, 220-square-mile expanse of glacially carved valleys, towering sea cliffs, wildflower meadows, legions of seabirds—and Iceland’s only native terrestrial mammal, the arctic fox. With its rounded ears, thick fur and shortened legs and snout, the arctic fox is supremely adapted to an unforgiving climate. Iceland’s fox population is split between white and blue color morphs. The white morph is completely white through the winter and mixed brown and white in the summer, while the blue morph remains a bluish brown throughout the year. Since the island’s settlement over a thousand years ago, Icelanders have hunted this small (less than 10 pounds) carnivore, at first for its fur and later to protect lambs...