Kenya holds a ceremony to honor the last male northern white rhino
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A memorial service to honor the world’s last male northern white rhino is held at Ol Pejeta Conservancy in northern Kenya on March 31, 2018. /Xinhua Photo

A memorial service to honor the world’s last male northern white rhino is held at Ol Pejeta Conservancy in northern Kenya on March 31, 2018. /Xinhua Photo

Given the name Sudan, he died on March 19. He was 45. /Xinhua Photo

Given the name Sudan, he died on March 19. He was 45. /Xinhua Photo

The tombstone of Sudan is unveiled at the event, which gathers Kenyan wildlife officials and global wildlife conservationists, calling for more efforts in protecting endangered animals. /Xinhua Photo

The tombstone of Sudan is unveiled at the event, which gathers Kenyan wildlife officials and global wildlife conservationists, calling for more efforts in protecting endangered animals. /Xinhua Photo

The last two females of the species are Sudan’s 27-year-old daughter Najin and 17-year-old granddaughter Fatu. /Xinhua Photo

The last two females of the species are Sudan’s 27-year-old daughter Najin and 17-year-old granddaughter Fatu. /Xinhua Photo