'Rare Critter' Spotted Climbing Trees At Colorado State Park, Video Shows

White squirrels in North America are almost always a variation of an eastern gray squirrel, according to the White Squirrel Institute. Leucistic squirrels typically have a fully white coat and dark eyes. This variant appears to spring up sporadically all over the species' range and then dies out, only to pop up again somewhere else, the White Squirrel Institute said on its website.