The Arctic fox is the only native land mammal on Iceland. Despite active volcanoes, limited forest cover, and an extreme northern climate, the Arctic fox has managed to eke out a living on this island since the last Ice Age.Arctic foxes are dimorphic, which means they can exhibit one of two phases—brown or white. They are the lone canine to undergo a change in coat color from summer to winter. The white Arctic fox begins molting in early July to expose its summer fur, which is fawn-colored and b