Photo taken on March 30, 2018 shows the world's last two remaining female northern white rhinos Najin (L) and Fatu in Ol Pejeta Conservancy in Laikipia county, northern Kenya. Kenyan wildlife officials and global wildlife conservationists on Saturday converged at Ol Pejeta Conservancy in northern Kenya where a memorial service for the late world's only remaining male northern white rhino fondly named Sudan took place. (Xinhua/Lyu Shuai)
