Two deer lock horns during the annual rutting season in Richmond Park in west London, Britain, January 1, 2016. (Photo by Toby Melville/Reuters)





A Black Woodpecker is seen perched on a tree in a park in Sofia, Bulgaria, January 4, 2016. (Photo by Stoyan Nenov/Reuters)





A four-day-old baby elephant is presented to the media at the Tierpark Zoo in Berlin, Germany, January 4, 2016, after its mother Kewa gave birth on New Year's Day. (Photo by Hannibal Hanschke/Reuters)





A four-day-old baby elephant is breastfed at the Tierpark Zoo in Berlin, Germany, January 4, 2016, after its mother Kewa gave birth on New Year's day. (Photo by Hannibal Hanschke/Reuters)





A four-day-old baby elephant is presented to the media at the Tierpark Zoo in Berlin, Germany, January 4, 2016, after its mother Kewa gave birth on New Year's Day. (Photo by Hannibal Hanschke/Reuters)





Draft horses gallop through a field, with the air temperature at about minus 24 degrees Celsius (minus 11.2 degrees Fahrenheit), outside Malaya Tumna village south of the Siberian city of Krasnoyarsk, Russia, January 4, 2016. (Photo by Ilya Naymushin/Reuters)





Mute swans and mallard ducks are seen in a lake as the temperature dropped to around minus 23 degrees Celsius (minus 9.4 degrees Fahrenheit) on the outskirts of Minsk, Belarus January 5, 2016. (Photo by Vasily Fedosenko/Reuters)





A mallard duck is seen in a lake as the temperature dropped to around minus 23 degrees Celsius (minus 9.4 degrees Fahrenheit) on the outskirts of Minsk, Belarus January 5, 2016. (Photo by Vasily Fedosenko/Reuters)





A mute swan is seen in a lake as the temperature dropped to around minus 23 degrees Celsius (minus 9.4 degrees Fahrenheit) on the outskirts of Minsk, Belarus January 5, 2016. (Photo by Vasily Fedosenko/Reuters)





Mallard ducks are seen in a lake as the temperature dropped to around minus 23 degrees Celsius (minus 9.4 degrees Fahrenheit) on the outskirts of Minsk, Belarus January 5, 2016. (Photo by Vasily Fedosenko/Reuters)





A man feeds seagulls at Bang Pu seaside resort in Samut Prakan province on the outskirts of Bangkok, Thailand, January 6, 2016. (Photo by Athit Perawongmetha/Reuters)





A man feeds a seagull at Bang Pu seaside resort in Samut Prakan province on the outskirts of Bangkok, Thailand, January 6, 2016. (Photo by Athit Perawongmetha/Reuters)





A man feeds seagulls at Bang Pu seaside resort in Samut Prakan province on the outskirts of Bangkok, Thailand, January 6, 2016. (Photo by Athit Perawongmetha/Reuters)





A three-week-old Magellanic penguin is pictured during a check up at the Sao Paulo Aquarium in Sao Paulo, Brazil, January 4, 2016. According to the aquarium, this is the second time that penguins have bred in the aquarium tank. (Photo by Paulo Whitaker/Reuters)





Visitors take photos of Magellanic penguins at the Sao Paulo Aquarium in Sao Paulo, Brazil, January 4, 2016. (Photo by Paulo Whitaker/Reuters)





Florida manatees swim in the Three Sisters Springs while under the watchful eye of snorkelers in Crystal River, Florida in this January 15, 2015, file photo. U.S. wildlife officials plan to announce on January 7, 2016, whether the manatee should be downgraded from endangered to threatened status, following extensive review of Florida's "sea cow," a species long considered at risk of becoming extinct. (Photo by Scott Audette/Reuters)





A picture made available 04 January 2016 shows seagulls during sunset at Bang Pu seaside resort in Samut Prakan province on the outskirts of Bangkok, Thailand, 03 January 2016. Every year during the cold winter months between October to March thousands of seagulls migrate to Bang Pu seaside from Siberia to escape the harsh winter. (Photo by Diego Azubel/EPA)





Kuli, the cat from Honolulu, surfs with its owner in Honolulu, Hawaii on January 4, 2016. The one-eyed cat was adopted weighing only one pound, but has since become an expert in riding the waves. (Photo by Caters News Agency)





A blue tit eats from a coconut filled with bird food in Essen, Germany, 06 January 2015. Blue tits are among the most common and most recognised bird species. (Photo by Roland Weihrauch/EPA)





A photograph made available on 06 January 2016 shows a leopard sitting on a branch in the Maasai Mara National Reserve in southwestern Kenya, 26 December 2015. (Photo by Dai Kurokawa/EPA)





A photograph made available on 06 January 2016 shows a hippopotamus reacting as he play fights with another in Amboseli National Park in southern Kenya, 28 December 2015. (Photo by Dai Kurokawa/EPA)





A 1373-gram Brazilian three-banded armadillo named 'Oesischnalle' is weighed by a zoo keeper during the annual inventory at the zoo in Dresden, Germany, 07 January 2016. (Photo by Arno Burgi/EPA)





A Scottish Fold cat takes part in a cat show at a children and youth creativity centrer in Vladivostok, Russia on January 4, 2016. (Photo by Smityuk Yuri/TASS via ZUMA Press)





A visitor plays with a squirrel at Gorky park in Moscow, Russia, 05 January 2016. Blocking anticyclone keeps cold weather in the central regions of Russia. Air temperature stays around minus 15 Celsius daytime and dropping lower minus twenty at night. (Photo by Sergei Chirikov/EPA)





Seven year old Hungarian herding dog Derci runs along the Olympiaberg hill during stormy weather in Munich, southern Germany, Monday, January 4, 2016. (Photo by Matthias Balk/DPA via AP Photo)





Two elephants feed a Christmas trees at the zoo Tierpark in Berlin, Germany, Thursday, January 7, 2016. Every year discarded Christmas trees are offered to the animals as a snack. (Photo by Markus Schreiber/AP Photo)





White lion Yabou opens a Christmas package filled with food on December 23, 2015 at the zoo in La Fleche, northwestern France. (Photo by Jean-Francois Monier/AFP Photo)





American white pelicans (Pelecanus erythrorhynchos) are fed with bycatch at Lake Chapala in Cojumatlan de Regules, Michoacan State, Mexico, on January 4, 2016. Thousands of white pelicans migrate from the United States and southern Canada to Mexico during winter. (Photo by Hector Guerrero/AFP Photo)





American white pelicans (Pelecanus erythrorhynchos) are seen in the waters of Lake Chapala in Cojumatlan de Regules, Michoacan State, Mexico, on January 4, 2016. (Photo by Hector Guerrero/AFP Photo)





An American white pelican feeds in the waters of Lake Chapala in Cojumatlan de Regules, Michoacan State, Mexico, on January 4, 2016. (Photo by Hector Guerrero/AFP Photo)





A picture made available 04 January 2016 shows seagulls during sunset at Bang Pu seaside resort in Samut Prakan province on the outskirts of Bangkok, Thailand, 03 January 2016. Every year during the cold winter months between October to March thousands of seagulls migrate to Bang Pu seaside from Siberia to escape the harsh winter. (Photo by Diego Azubel/EPA)