Northern white rhinoceros (Ceratotherium simum cottoni) behind bars in Dvur Kralove Zoo, Czech Republic, the day before departure - Dec 2009. Extinct in the wild and 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.