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.
