A nature documentary series on five vulnerable or endangered species known to form enduring populations: chimpanzee, emperor penguin, lion, tiger and African wild dog.A nature documentary series on five vulnerable or endangered species known to form enduring populations: chimpanzee, emperor penguin, lion, tiger and African wild dog.A nature documentary series on five vulnerable or endangered species known to form enduring populations: chimpanzee, emperor penguin, lion, tiger and African wild dog.
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