The northern white rhinoceros, or northern square-lipped rhinoceros (Ceratotherium simum cottoni), is one of the two subspecies of the white rhinoceros. Formerly found in several countries in East and Central Africa south of the Sahara, it is considered Critically Endangered or Extinct in the Wild. This subspecies is a grazer in grasslands and savanna woodlands. In the world, there are currently only three rhinos of this subspecies left in captivity.