Wolves can live in a wide range of habitats around the world, including forests, plains, mountains, and both cold and hot climates. Their coloration varies by location, with grey being most common, while arctic wolves are white and red wolves are cinnamon colored. Female wolves give birth after a two month pregnancy, and pups are born blind but see after 10-14 days; they learn to hunt at four months and reach adulthood at three years. Wolves are related to dogs, hyenas, jackals and other canine species. They are opportunistic eaters that consume meat, berries and other foods found in their environment. Wolf sizes vary significantly between species but average weights range from