This photo taken Tuesday, April 19, 2011 and released by the conservation group Gorilla Doctors on Friday, Nov. 16, 2012, shows a mountain gorilla in Bwindi Impenetrable National Park in Uganda. The population of Uganda's mountain gorillas has grown to 400, up from 302 in 2006, according to a census conducted in 2011, bringing the total number of mountain gorillas in Africa to 880 and giving hope to conservationists trying to save the critically endangered species. (AP Photo/Gorilla Doctors)

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