In Africa, southern whiterhinos, once thought to be extinct, now thrive in protected sanctuaries and are classified as near threatened. The only two remaining northern white rhino are kept under 24-hour guard in Ol Pejeta Conservancy in Kenya.Black rhinos have doubled in number over the past two decades from their low point of fewer than 2,500 individuals, but total numbers are still a fraction of the estimated 100,000 that existed in the early part of the 20th century.
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