Captive-bred pair, the male panda Ba Xi and the female panda Ying Xue, walk into the forest out of the cage after being released into the wild at Liziping Nature Reserve on November 23, 2017 in Ya'an, Sichuan Province of China. They are the second pair released into the wild in the World. (Photo by VCG/VCG via Getty Images)





Golden snub-nosed monkeys plays at Shennongjia on November 22, 2017, Hubei province, China. Golden snub-nosed monkeys are distinguished by their bright fur, graceful movements and gentle nature. They were once widely distributed throughout China but have retreated to high mountains because of changes in the environment. Shennongjia, with mountains, thick forests and abundant rainfall that nurture diverse foods for animals, is an important habitat for the golden snub-nosed monkeys. Wild snub-nosed monkeys were first spotted there in the 1980s.Over the years, the number of the snub-nosed monkey population in the reserve has risen from about 500 in the mid-80s to more than 1,300 now. (Photo by Wang He/Getty Images)





A tit picks from the fruit of a crabapple tree standing in a garden in Frankfurt am Main, western Germany, on November 21, 2017. (Photo by Frank Rumpenhorst/AFP Photo/DPA)





Two kittens are seen between spilled leaves on the ground in Plomari region of Lesbos in Greece on November 22, 2017. (Photo by Ayhan Mehmet/Anadolu Agency/Getty Images)





A male mallard duck reflects in the water of the Schliersee lake in Schliersee, southern Germany, on November 22, 2017. (Photo by Sven Hoppe/AFP Photo/DPA)





A horse in a frost covered field as the sun rises in Swillington, West Yorkshire, England on November 19, 2017. (Photo by Danny Lawson/PA Images via Getty Images)





Alpacas guarding free range turkeys on the Kings Coppice Farm in Maidenhead, Berkshire, England on November 23, 2017. (Photo by Jonathan Brady/PA Images via Getty Images)





Alpacas guarding free range turkeys on the Kings Coppice Farm in Maidenhead, Berkshire, England on November 23, 2017. (Photo by Jonathan Brady/PA Images via Getty Images)





A young giant panda struggles to climb down a tree at the Panda Research Base in Chengdu, Sichuan Province, China on November 20, 2017. In China's mountainous Sichuan Province, a network of research centers, nature reserves, breeding facilities and wildlife sanctuaries have been established to support the endangered and vulnerable giant panda. (Photo by Stephen Shaver/UPI/Barcroft Images)





A bohemian waxwing eats a rowan berry in the Ivanovo region of Russia on November 21, 2017. (Photo by Vladimir Smirnov/TASS)





A long-tailed monkey, wearing jeans and a doll's head perform on the streets of Boyolali, Central Java Indonesia. Primates are used by owners to beg at crossroads, the primate show can earn $ 5 per day. Begging using long-tailed monkeys is opposed by animal lovers community as it is considered to torture and degrade animal health. (Photo by Arief Setiadi/Pacific Press/Barcroft Images)





A long-tailed monkey, wearing jeans and a doll's head perform on the streets of Boyolali, Central Java Indonesia. (Photo by Arief Setiadi/Pacific Press/Barcroft Images)





Horses frolicking in a snow- covered paddock near Pfronten, Germany, 19 November 2017. (Photo by Karl- Josef Hildenbrand/DPA)





A veterinarian checks the health of a ring-tailed lemur with a stethoscope at a wildlife park in Qingdao, Shandong province, China November 21, 2017. (Photo by Reuters/China Stringer Network)





Turkeys stand in their barn at Seven Acres Farm, one day before the Thanksgiving holiday in North Reading, Massachusetts, U.S., November 22, 2017. (Photo by Brian Snyder/Reuters)





Black Buzzards gather around the carcass of a sea turtle at Shalpa beach in Jicalapa, El Salvador, November 22, 2017. Hundreds of turtles were found in the coast of El Salvador in the last days. According to the officials of the Environment Ministry turtles were poisoned by “saxitoxins” or potent neurotoxins that lead to paralysis, linked to a so-called red tide algal bloom. (Photo by Jose Cabezas/Reuters)





Ural owl (strix uralensis), which is included in Belarus' national red data book of endangered birds and animals, rests on a tree branch in Minsk, Belarus on November 23, 2017. (Photo by Vasily Fedosenko/Reuters)





Swans glide past as the 140m height landmark Fountain of Geneva (called “Jet d'Eau” in French) is illuminated in orange to commemorate United Nations-backed International Day for the Elimination of Violence Against Women on November 25, 2017 in Geneva, Switzerland. (Photo by Fbrice Coffrini/AFP Photo)





11-year-old Malayan tiger Banya is seen with her twin cubs at their enclosure at Prague Zoo, Prague, Czech Republic on the November 21, 2017. On October 03, 2017 twins Malayan tigers were born at Prage Zoo. The male is larger, weighing 5.16 kg and the female weighs 3.78 kg. Pavel Brand, the keeper and tiger expert, says that are only a few hundred Malayan tigers surviving in the wild in Asia and they are classified as critically endangered. (Photo by Omar Marques/Anadolu Agency/Getty Images)





A female Amur leopard called Rona walks in the snow in Primorye Safari Park, Primorye Territory, Russia on November 18, 2017. (Photo by Yuri Smityuk/TASS)