Northern white rhinoceros (Ceratotherium simum cottoni) with horn removed, after initial release into the wild, Ol Pejeta Conservancy, Kenya, June 2010, Extinct in the wild, only eight left in captivity, critically endangered, Part of a rescue operation to move four northern white rhinos from Dvur Kralove Zoo, Czech Republic, to Ol Pejeta Conservancy, Kenya, in order to save the rarest animal in the world from extinction.