A Colombian policeman performs with his dog during the opening of the IV Meeting of Ministers of Public Security of the Americas, on November 21, 2013, in Medellin, Antioquia department, Colombia. (Photo by Raul Arboleda/AFP Photo)

A West Highland Terrier walks through the sand dunes on Portstewart Strand as strong winds continue to hit the coastline in Northern Ireland November 21, 2013. (Photo by Cathal McNaughton/Reuters)

A Khmer farmer stands next to his cows before a cow-racing performance at the Khmer cultural festival in Dong Mo cultural village outside Hanoi November 21, 2013. The festival includes events featuring the culture of ethnic Khmer people from Mekong delta provinces, which will be held in Hanoi from November 18 to 24. (Photo by Reuters/Kham)

Masha, a female raccoon, yawns in her wooden refuge inside an open-air cage where she hibernates at the Royev Ruchey zoo in Krasnoyarsk, November 20, 2013. Many animals in the zoo are having difficulties hibernating due to unusually warm temperatures, employees of the zoo said. (Photo by Ilya Naymushin/Reuters)

Undated handout photo issued by Chester Zoo of a recently born Kirk's dik-dik antelope, named Neo, which was rejected by its mother at Chester Zoo, which is being helped along by its elder sister named Aluna, which was also rejected by the mother. Eight-month-old Aluna is playing the big sister to 22cm high new arrival Neo, giving him lots of the special care she herself received after she was born. The mini dik diks – one of the smallest species of antelope in the world – have struck up a charming bond and Aluna is taking her new duties in her somewhat short stride. The Kirk's dik-dik is native to Kenya, Tanzania and Namibia and is named after the sound it makes when fleeing danger. They can live for up to 10 years and reach a maximum size of just 40cm tall, making it one of the smallest antelope species in the world. (Photo by Chester Zoo/PA Wire)

Andy Smith on his way to victory in the second heat during The William Hill Camel Derby at Chepstow Racecourse, on November 21, 2013. (Photo by David Davies/PA Wire)

Female orang-outang Miri climbs while carrying food in her mouth and hands at the Darwineum in Rostock, Germany, on November 18, 2013. The Darwineum was opened on September 8, 2012. Apart from apes it accomodates about 40 species. It offers it's visitors a trip through evolution. (Photo by Bernd Wuestneck/AFP Photo/DPA)

Roisin NI Chuinn of Gaelscoil Bharra in Cabra, Dublin pictured at a UCC's Junior Conferring Programme, UCC Cork City, on November 20, 2013. Just over 20 Primary school students from Gaelscoil Bharra in Cabra, Dublin now hold the dual distinction of being Ireland's youngest “graduates” and the class that's travelled furthest to experience University College Cork's (UCC) magical Junior Conferring Programme. (Photo by Clare Keogh/PA Wire)

Two Sumatran tiger cubs, a male, Bandar and a female, Sukacita, play on a set of stairs as they make their public debut at the National Zoo in Washington, Monday Nov. 18, 2013. The two cubs were born in August and are now on public view. (Photo by Jacquelyn Martin/AP Photo)

Carp wait to be fed in a Japanese garden pond at Kyu Shiba Rikyu Garden in Tokyo, on November 18, 2013. (Photo by Koji Sasahara/Associated Press)

A family of baby brown bears appear to be dancing to Ring a Ring o' Roses as their mother relaxes behind a tree nearby. (Photo by Valtteri Mulkahainen/Solent News & Photo Agency)

This inquisitive squirrel gatecrashes a game of Jenga – and knocks down the tower that took a family half an hour to build. (Photo by Max Ellis/Solent News & Photo Agency)

Stunning silhouette of a Red Deer Stag bellowing taken early morning at at Burley Manor, New Forest. (Photo by Mark Rutley/Solent News)

The two bears stand on their hind legs on a face-off over salmon fish. (Photo by Tin Man Lee/Caters News)

Petite ladybird posers are some of the teeniest models on the planet but still know how to trigger a buzz of excitement. (Photo by Caters News Agency)

NDMA corps display the performance of trained canines in a dog show during a Mock earthquake rescue drill perform at India International Trade Fair, on November 20, 2013. (Photo by Rajk Raj/Hindustan Times)

A 3-week-old Australian Black Swan nestling walks out of a pool at the Royev Ruchey Zoo, in Krasnoyarsk, on November 21, 2013. (Photo by Ilya Naymushin/Reuters)

A Samburu moran stands next to a fattened black bull in the remote northern Kenya village of Wamba in Samburu November 21, 2013. British High Commissioner to Kenya, Christian Turner, will accept the bull from the Namunyak women's group during a ceremony to bless and celebrate the birth of Britain's Prince George. Prince George is the son of Britain's Prince William and Catherine, the Duchess of Cambridge. (Photo by Noor Khamis/Reuters)

Karis, an eleven week old lion cub, rests in fallen leaves brushed up by keepers in her enclosure at Blair Drummond Safari Park, near Stirling, Scotland, on November 20, 2013. (Photo by Andrew Milligan/PA Wire)

Karis plays in the fallen leaves. (Photo by Andrew Milligan/PA Wire)

Karis plays in the fallen leaves. (Photo by Andrew Milligan/PA Wire)

A member of the “Ranetka” private family club takes a medical-cosmetic massage using the Achatina fulica snail, also known as the Giant African land snail, at the club in the Siberian city of Krasnoyarsk, on November 19, 2013. The massage is believed to speed up regeneration of the skin and eliminate wrinkles and scars. (Photo by Yelena Baranchukova/Reuters)

School children watch as volunteers of the Israeli sea turtle rescue center free a Loggerhead sea turtle back to the Mediterranean sea on November 21, 2013 in Gaash, Israel. The turtle is one of two wounded Loggerhead sea turtles that were rehabilitated at the rescue center and freed today. From transplanting turtle nests during the nesting season to protected beaches, through the rescue and treatment of wounded turtles brought in by fishermen or washed up on Israel's shores, to the development of a long-range breeding program for the threatened Green turtles, the volunteers and staff of the Israeli Nature and Parks Authority are doing their best to protect the creatures. The numbers have dwindled in the Mediterranean to an estimated 450 nesting female Green turtles and about 2500 nesting female Loggerheads. Far removed from man-made obstacles and protected from their natural predators such as crabs, foxes and birds, the hatchlings make their race to the sea with the hope that more than 20 years later they will return to the same beach to ensure the species survival. (Photo by Uriel Sinai/Getty Images)

A pair of harbor seals wearing satellite-linked transmitters on their heads face each after being released into the waters of Howe Sound in Porteau Cove, British Columbia, on November 20, 2013. The seals had received months of care at the Vancouver Aquarium Marine Mammal Rescue Centre after being rescued from the wild. Wearing the transmitters will help track their movements after their release. (Photo by Andy Clark/Reuters)

Cattle brave a blizzard sweeping through Seaton Sluice, North Tyneside as the wintry conditions blow in across the UK, on November 19, 2013. (Photo by Owen Humphreys/PA Wire)