Foxes living where it is cold all the time generally stay white, while those living on the coast where it is warmer tend to stay bluish. Arctic foxes are highly opportunistic eaters, and will feed on rodents, lemmings, scavenge from wolf kills of bison, walrus carcass, flightless sea birds, and their eggs. They often cache food in holes dug in the ice, to eat later. The arctic foxes' population is directly correlated to the lemming. Both their lives exhibit a four year cycle, with the highest fox numbers peaking with the highest lemming numbers.
Arctic foxes are perhaps the only canid that has no fear of man.
They have been observed stealing food from camps and bothered men skinning seals. This is rather unusual, because the arctic fox has been persecuted just like any other fox for its fur. So it is surprising that they still come into such close contact with people. It is believed they are also carried by ice floes in the springtime. Arctic foxes have a distinct seasonal movement pattern.