A park ranger walks ahead of a nothern white female rhinoceros named Najin and a companion southern-white female at Ol Pejeta Conservancy, some 290 kms north of the Kenyan capital, Nairobi, on January 27, 2015. Najin is one of only five members of the sub-species left on the planet, three of which reside at Ol Pejeta Conservancy. Conservationists and scientists met in Kenya this week to come up with a last ditch plan to save the northern white rhinoceros from extinction.  AFP PHOTO / TONY KARUMBA - TO GO WITH AFP STORY BY TRISTAN MCCONNELL        (Photo credit should read TONY KARUMBA/AFP/Getty Images)