The arctic fox lives in the Arctic regions of the northern hemisphere. This includes the northernmost parts of Canada, Alaska and Russia. The arctic fox has several adaptations, such as a compact body and thick fur, that allow it to withstand the brutal conditions it lives in.
The arctic fox also has a countercurrent heat exchange system and relatively high levels of body fat to maintain its body temperature. Arctic foxes are opportunistic feeders and are known to scavenge, although lemmings are their main source of food. The average length of the male arctic fox approaches 34 inches, while females are slightly smaller. Arctic foxes are known to mate for life.