Shy black rhino moves through breathtaking open plains view. Navy chief removed from duties for investigation Liev Schreiber ...

They are different not in color but in lip shape. The black rhino has a pointed upper lip, while its white relative has a squared lip. The difference in lip shape is related to the animals' diets.

Using them has "revolutionized the world of rhino conservation," according to Ursina Rusch, population manager for the World Wildlife Foundation's South Africa Black Rhino Range Expansion Project.