This 2014 photo provided by Nat Geo Wild shows a hyena family in the Djuma Game Reserve, in South Africa. Safari Live gives viewers a front row seat on daily safari rides as the natural habitat of lions, giraffes, elephants and more are explored during the program. Nat Geo Wild airs a live safari as part of its Big Cat week, airing Nov. 27-Dec. 2, 2015. (Photo by Pieter Pretorius/Nat Geo Wild via AP Photo)





This November 2, 2015 photo provided by the Wildlife Conservation Society shows a baby red panda at the Prospect Park Zoo in the Brooklyn borough of New York. It is one of two red pandas born at the Brooklyn zoo on July 1. The red pandas, which look similar to raccoons, are not members of the bear family that giant pandas belong to. (Photo by Julie Larsen Maher/Wildlife Conservation Society via AP Photo)





This November 2, 2015 photo provided by the Wildlife Conservation Society shows a red panda flanked by two baby red pandas at the Prospect Park Zoo in the Brooklyn borough of New York, where they have made their debut. (Photo by Julie Larsen Maher/Wildlife Conservation Society via AP Photo)





Bugingo, an old gorilla silverback of the Nyakagezi gorilla group, is seen at Mgahinga Gorilla National Park, the smallest national park in Uganda, November 20, 2015. According to local wildlife authorities, the Nyakagezi gorilla group frequently moves adjacent in the forests of the Uganda, Democratic Republic of Congo and Rwanda. The local wildlife authorities added that Uganda has about 400 Gorillas in total, being one of only three places Mountain Gorillas can be found in the wilderness worldwide, the others being DRC and Rwanda. (Photo by Edward Echwalu/Reuters)





A game ranger keeps track of Ndugutse, a silverback gorilla of the Nyakagezi gorilla group, at Mgahinga Gorilla National Park, the smallest national park in Uganda, November 20, 2015. (Photo by Edward Echwalu/Reuters)





Cyizanye, a juvenile gorilla belonging to the Nyakagezi group, is seen at Mgahinga Gorilla National Park, the smallest national park in Uganda, November 20, 2015. (Photo by Edward Echwalu/Reuters)





Cow stand in a snow covered pine forest in the Basque mountain port of Opakoa, northern Spain, November 23, 2015. Thermometers dropped and snows fell across northern Spain following unseasonably high November temperatures. (Photo by Vincent West/Reuters)





Cows eat pine needles in a snow covered forest in the Basque mountain port of Opakoa, northern Spain, November 23, 2015. (Photo by Vincent West/Reuters)





A giant panda sits on a tree during the first snow in Jinan, Shandong province, November 24, 2015. (Photo by Reuters/Stringer)





A Giant Panda plays in the snow at Beijing Zoo on November 24, 2015 in Beijing, China. (Photo by Xiao Lu Chu/Getty Images)





Twin giant panda cubs born to mother Er Shun are seen in this undated handout picture taken at the Toronto Zoo in Toronto, Ontario. The cubs are now nearly six weeks old and will be living within the maternity area inside the Giant Panda House at the zoo for approximately four to five months. (Photo by Reuters/The Toronto Zoo)





Giant panda mother Er Shun holds one of her twin cubs in this undated handout picture taken at the Toronto Zoo in Toronto, Ontario. (Photo by Reuters/The Toronto Zoo)





Twin giant panda cubs born to mother Er Shun are seen in this undated handout picture taken at the Toronto Zoo in Toronto, Ontario. (Photo by Reuters/The Toronto Zoo)





Giant panda Basi eats a cake given by a keeper to celebrate its 35th birthday, at a giant panda research centre in Fuzhou, Fujian province, China, November 28, 2015. According to local media, Basi is the eldest giant panda in mainland China. (Photo by Reuters/Stringer)





Giant panda Basi imitates its keeper to wave at visitors on its 35th birthday, at a giant panda research centre in Fuzhou, Fujian province, China, November 28, 2015. (Photo by Reuters/Stringer)





Taronga Zoo in Sydney, Australia, celebrates the birth of a François’ langur, one of the world’s rarest monkeys. The male infant has been named Nangua after the Mandarin word for pumpkin. François’ langurs are born with bright orange fur that gradually darkens as they age. The species is endangered, with about 800 thought to remain in the wild. (Photo by Taronga Zoo)





A newborn grey seal pup is tended by its mother at Donna Nook, a nature reserve on the county’s coastline managed by Lincolnshire Wildlife Trust in Lincolnshire, UK on November 23, 2015. (Photo by David Tipling/Rex Shutterstock)





A handout photo dated 29 September 2015 and provided on 23 November 2015 by the San Diego Zoo Safari Park shows Nola, a 41 year-old female northern white rhino that had to be euthanized on 22 November 2015 after her condition deteriorated following surgery to drain a hip abscess on on 13 November, in San Diego, California, USA. Nola was one of four remaining northern white rhinos left on the planet. The species has fallen prey to poachers who prize their horns. The remaining three of the species, a 43-year-old male, Sudan, and two females, 26-year-old Najin and 15-year-old Fatu, are living under human care at the Ol Pejeta Conservancy in Kenya. (Photo by EPA/San Diego Zoo Safari Park)





A carp (Cyprinus carpio) opens its mouth in hope for feed in pond at Palmengarten botanical garden in Frankfurt a Main, Germany, 23 November 2015. The freshwater fish is a traditional Christmas dish in central Europe. (Photo by Frank Rumpenhorst/EPA)





Two macaques play together in Lion Peak of Yellow Mountain after the snow has cleared on November 25, 2015 in Huangshan, Anhui Province of China. (Photo by ChinaFotoPress/ChinaFotoPress via Getty Images)





Sick and malnourished Northern Fur Seal pups sit in an enclosure at the Marine Mammal Center on November 24, 2015 in Sausalito, California. A record number of emaciated Northern Fur Seal pups have been found stranded on California beaches and are being cared for at the Marine Mammal Center. Scientists believe that warmer waters are affecting the distribution of fish that Fur Seals and other marine life depend on. The Marine Mammal Center has rescued 1,747 seals and sea lions so far this year, more than any time in their 40 year history. (Photo by Justin Sullivan/Getty Images)





One-year-old Chimpanzee Liwali plays with ice blocks at Taronga Zoo where keepers filled the ice blocks with the chimp's favourite foods in Sydney, Friday, November 20, 2015. With forecast temperatures expected reach above 40 celcius (104 Fahrenheit) zoo keepers placed the large ice blocks around the exhibit for the chimps to find when they came out for breakfast. (Photo by Rick Rycroft/AP Photo)





A baby orangutan receiving medical checkup at Sumatran Orangutan Conservation rehabilitation center in Batu Mbelin, North Sumatra, Indonesia on November 23, 2015. Three baby Sumatran orangutans were recovered recently after police arrested wildlife traffickers who smuggled them out of Aceh province. (Photo by Tanto H./Xinhua via ZUMA Wire)





An unnamed three-week-old baby pygmy hippopotamus calf stays close to its mother, Sirana's, legs as it explores Bristol Zoo's hippo house in London, England on November 19, 2015. (Photo by Ben Birchall/PA Images/Startraksphoto)





This undated handout photograph made available on November 24, 2015 by Wildlife Reserves Singapore (WRS) shows a red ruffed lemur (Varecia rubra), at an undisclosed location. More than half the world's primates, including apes, lemurs and monkeys, as well as the red ruffed lemur (Varecia rubra), were facing extinction, international experts warned in a report on November 24, with 10 of the 25 most endangered found in Asia. (Photo by AFP Photo/Wildlife Reserves Singapore)