23 NOV: One of the world's last four remaining northern white rhinos has died in a zoo in the United States. The condition of Nola, a 41-year-old female, had deteriorated after surgery and she was put down on Sunday. Nola had been a popular attraction at the San Diego Zoo Safari Park since 1989. The remaining three northern white rhinos - all elderly - are kept closely guarded at the Ol Pejeta Conservancy in Kenya. Nola underwent surgery on 13 November to drain a hip abscess. However, her health deteriorated a week ago and worsened again over the weekend and it was decided she should be put down. The northern white rhino population was devastated by poachers seeking their prized horns, and was declared extinct in the wild in 2008. PHOTO: Lenny Ignelzi / AP #BBCSnapshot #Rhino #Nola #SanDiegoZoo #whiterhino #Endangered #species #conservation #extinction by bbcnews

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