A gorilla eats a hot potato on January 9, 2017 at the Bioparco (zoo) in Rome. Hot potatoes were distributed to animals today at the Bioparco in Rome as a cold wave hits Italy since a week with unusual snowfalls in the southern region of Puglia. (Photo by Tiziana Fabi//AFP Photo)





Macaques groom each other in the winter sunshine at Ueno Zoo in Tokyo, Saturday, January 7, 2017. The temperature of Tokyo's metropolitan area dropped to near zero degree Celsius (32 F) Saturday morning. (Photo by Koji Sasahara/AP Photo)





A dog enjoys the fresh snow in Salgotarjan, 109 kms northeast of Budapest, Hungary, Friday, January 13, 2017. (Photo by Peter Komka/MTI via AP Photo)





Two meerkat (Suricata suricatta) are fighting in Zoo in the wilhelma in Stuttgart, Germany, 11 January 2017. The meerkats, also called suricates, is a mammalian species from the mongoose family. They live in the dry regions of southern Africa. (Photo by Ronald Wittek/EPA)





A Red panda (Ailurus fulgens) feeds on fruits at its enclosure at the zoo of Mulhouse, eastern France, on January 11, 2017. (Photo by Sebastien Bozon/AFP Photo)





Elsa the 4- month- old Siberian tiger cub in the undergrowth at Barendorf beach near Dassow, Germany, 9 January 2017. Elsa was born in a travelling circus and was rejected by her mother, so the Farell family from Luebeck have been rearing her by hand for weeks. The young animal is due to move from the family' s home to its own enclosure at the Tigerpark Dassow zoo in March. (Photo by Jens Büttner/DPA/Zentralbild)





Curious ostriches watch the photographer making pictures of them on January 9, 2017 at the Opelzoo zoo in Kronberg near Frankfurt am Main, western Germany. (Photo by Frank Rumpenhorst/AFP Photo/DPA)





In this October 11, 2016 photo, a western lowland gorilla, Bebac, gets an ultrasound at the Primate, Cat & Aquatics Building at Cleveland Metroparks Zoo, in Cleveland. Zoo officials in Cleveland say one of its two western lowland gorillas has died Friday, January 6, 2017. The Cleveland Metroparks Zoo announced the death of 32-year-old Bebac on its Facebook page. (Photo by Kyle Lanzer/Cleveland Metroparks via AP Photo)





A Persian leopard plays with a bottle of snow at the town’s zoo in Dvur Kralove nad Labem, Czech Republic on January 13, 2017. (Photo by Slavek Ruta/Rex Features/Shutterstock)





Ducks struggle to keep their balance on the frozen waters of the Idroscalo artificial lake, in Milan, Italy, Tuesday, January 10, 2017. Heavy snow and frigid temperatures have gripped large parts of Europe, leading to dozens of deaths, freezing rivers, the grounding of planes and traffic accidents. (Photo by Luca Bruno/AP Photo)





A bird sits on a twig of a plant on the fields at Khokana in Lalitpur, Nepal January 9, 2017. (Photo by Navesh Chitrakar/Reuters)





An employee watches a shark swim overhead from inside a glass tunnel, during the annual stock taking, at the aquarium operated by Britain's Sea Life Centers in Munich, Germany January 10, 2017. (Photo by Michael Dalder/Reuters)





Marusya, a Northern hawk-owl, is seen during a training session which is a part of Royev Ruchey zoo's programme of taming wild animals for research, and for enlightenment and interaction with visitors, in the Siberian taiga forest in the suburb of Krasnoyarsk, Russia January 10, 2017. (Photo by Ilya Naymushin/Reuters)





Zoo employee Daria Zhirnova holds Marusya, a Northern hawk-owl, during a training session which is a part of Royev Ruchey zoo's programme of taming wild animals for research, and for enlightenment and interaction with visitors, in the Siberian taiga forest in the suburb of Krasnoyarsk, Russia January 10, 2017. (Photo by Ilya Naymushin/Reuters)





Zoo employee Daria Zhirnova dressed in an Evenki traditional costume, holds Pykh, an 8-month-old eagle owl, during a training session which is a part of Royev Ruchey zoo's programme of taming wild animals for research, and for enlightenment and interaction with visitors, in the Siberian taiga forest in the suburb of Krasnoyarsk, Russia January 10, 2017. (Photo by Ilya Naymushin/Reuters)





Zoo employee Daria Cherepanova walks with Mykh, an 8-month-old great gray owl, during a training session which is a part of Royev Ruchey zoo's programme of taming wild animals for research, and for enlightenment and interaction with visitors, in the Siberian taiga forest in the suburb of Krasnoyarsk, Russia January 10, 2017. (Photo by Ilya Naymushin/Reuters)





Zoo employees Daria Zhirnova (R) with Pykh, an 8-month-old eagle owl, and Daria Cherepanova with Mykh, an 8-month-old great gray owl, walk during a training session which is a part of Royev Ruchey zoo's programme of taming wild animals for research, and for enlightenment and interaction with visitors, in the Siberian taiga forest in the suburb of Krasnoyarsk, Russia January 10, 2017. (Photo by Ilya Naymushin/Reuters)





A highland cow scratches itself in a snow covered field in Pitlochry Scotland, Britain January 12, 2017. (Photo by Russell Cheyne/Reuters)





Chulina, a female panda baby, that was born last August, stands beside its mother Hua Zui Ba inside their indoor enclosure during its public presentation at a zoo in Madrid, Spain, January 12, 2017. (Photo by Sergio Perez/Reuters)





Xing Bao, a panda bear, eats bamboo inside its enclosure at a zoo in Madrid, Spain, January 12, 2017. (Photo by Sergio Perez/Reuters)





Baby panda Chulina, born last August, is reflected in a glass inside her indoor enclosure during her public presentation at the zoo in Madrid, Spain January 12, 2017. (Photo by Sergio Perez/Reuters)





An Asian elephant eats a used Christmas tree at the zoo in Cologne, Germany January 12, 2017. (Photo by Wolfgang Rattay/Reuters)





An Asian elephant eats a used Christmas tree at the zoo in Cologne, Germany January 12, 2017. (Photo by Wolfgang Rattay/Reuters)





Two dogs play with a stick in the snow near Pitlochry in Scotland, Britain January 14, 2017. (Photo by Russell Cheyne/Reuters)





An owl is pictured on January 12, 2017 in Hannover zoo. (Photo by Julian Stratenschulte/AFP Photo/DPA)





A peacock is seen inside its enclosure at Jurong Bird Park in Singapore on January 11, 2017. (Photo by Roslan Rahman/AFP Photo)





Polar bear Wolodja takes a nap in its enclosure in the Berlin Tierpark zoo. Sunday January 8, 2017. (Photo by Maurizio Gambarini/DPA via AP Photo)





An undated handout picture released on January 10, 2017 by the Issekinicho publishing house shows an inter- species sexual behaviour between a male Japanese macaque and female sika deer, in Yakushima Scientists revealed on January 10, 2017 the “highly unusual” behaviour of a male monkey filmed trying to have s*x with female deer in Japan – a rare case of inter- species nookie. (Photo by Editions Issekinicho/AFP Photo)





An undated handout picture released on January 10, 2017 by the Issekinicho publishing house shows an inter- species sexual behaviour between a male Japanese macaque and female sika deer, in Yakushima Scientists revealed on January 10, 2017 the “highly unusual” behaviour of a male monkey filmed trying to have s*x with female deer in Japan – a rare case of inter- species nookie. (Photo by Editions Issekinicho/AFP Photo)





A hawk owl sits on a fir branch near the village of Vasilkova, Belarus January 9, 2017. (Photo by Vasily Fedosenko/Reuters)





A handout photo issued by Berlin's Tierpark Zoo, showing veterinary doctor and director Dr. Andreas Knieriem (R) inspecting the yet unnamed polar bear cub to determine its condition and s*x, Berlin, Germany, late 12 January 2017. The cub was given birth by polar bear mother Tonja some seven weeks ago, and now has reached a 67 cm length and weighing some 4,6 kilograms. The Zoo has launched a campaing asking public for name suggestions for the cub. (Photo by EPA/Tierpark Berlin)





A handout photo issued by Berlin's Tierpark Zoo, showing the yet unnamed polar bear cub during an inspection to determine its condition and s*x, Berlin, Germany, late 12 January 2017. (Photo by EPA/Tierpark Berlin)