This January 20, 2015 photo shows Bryce, a blind harbor seal pup, at the Alaska SeaLife Center in Seward, Alaska. The seal, rescued in December, was deemed unfit to be released back into the wild. (Photo by Jenna Miller/AP Photo/Alaska SeaLife Center)

This January 20, 2015 photo shows Bryce, a blind harbor seal pup, being treated at the Alaska SeaLife Center in Seward, Alaska. (Photo by Jenna Miller/AP Photo/Alaska SeaLife Center)

This January 20, 2015 photo shows Bryce, a blind harbor seal pup, being treated at the Alaska SeaLife Center in Seward, Alaska. (Photo by Jenna Miller/AP Photo/Alaska SeaLife Center)

A flamingo hides its head in its feathers on a cold Friday, January 23, 2015 at the zoo in Cologne, Germany. (Photo by Martin Meissner/AP Photo)

Orangutan baby Cinta plays in a barrel on Friday, January 23, 2015 at the zoo in Cologne, Germany. (Photo by Martin Meissner/AP Photo)

A suricate warms itself under a lamp on a cold Friday, January 23, 2015 at the zoo in Cologne, Germany. (Photo by Martin Meissner/AP Photo)

Mother gorilla Imani gestures as her daughter Joanne sits close by at the San Diego Zoo Safari Park, Tuesday, January 27, 2015, in Escondido, Calif. Joanne is approaching her first birthday in March, after being born via a rare emergency cesarean section. Despite early complications, the baby gorilla now appears to be doing well. (Photo by Gregory Bull/AP Photo)

Julia takes a selfie with a seal in a water tunnel at the zoo in Gelsenkirchen, Germany, Monday, January 26, 2015. (Photo by Martin Meissner/AP Photo)

A seal waits for fish at the zoo in Gelsenkirchen, Germany, Monday, January 26, 2015. (Photo by Martin Meissner/AP Photo)

Female orangutan baby, Surya, rests in the enclosure in the zoo in Rostock, northeastern Germany, Wednesday, January 28, 2015. (Photo by Bernd Wuestneck/AP Photo/DPA)

Horses brave the cold wind as they stand close on a field in Duisburg, Germany, Thursday, January 29, 2015. Germany faces stormy winds and temperatures around the freezing point. (Photo by Frank Augstein/AP Photo)

Lady, a mixed-breed rescue dog, sails into the water after a tennis ball at a new dog park near downtown Houston, Tuesday, January 27, 2015. Houston temperatures are in the mid-70's for a beautiful spring-like day. (Photo by Pat Sullivan/AP Photo)

Cenzoo, a silverback gorilla, peers from an overhang in his enclosure at The Birmingham Zoo, Tuesday, January 27, 2015, in Birmingham, Ala. Cenzoo is the only silverback gorilla at the zoo and will soon have a new home in Riverbanks Zoo and Garden in Columbia, South Carolina. (Photo by Frank Couch/AP Photo/AL.com)

A husky with different coloured eyes waits by the track during a training session at Feshiebridge, in Aviemore, Scotland January 23, 2015. The Siberian Husky Club of Great Britain will hold its annual sled dog rally this weekend. (Photo by Russell Cheyne/Reuters)

A husky puppy pulls on its leash during a training session at Feshiebridge, in Aviemore, Scotland January 23, 2015. (Photo by Russell Cheyne/Reuters)

A Cornish Rex looks out from a blanket at the annual cat show in Del Mar, California January 24, 2015. (Photo by Mike Blake/Reuters)

Cats wait to be judged at the annual cat show in Del Mar, California January 24, 2015. (Photo by Mike Blake/Reuters)

Cat judge Larry Adkison judges a cat during the annual cat show in Del Mar, California January 24, 2015. (Photo by Mike Blake/Reuters)

Lolita the Killer Whale and a trainer perform during a show at the Miami Seaquarium in Miami January 21, 2015. In the coming days the National Oceanic and Atmospheric Administration will decide whether to list Lolita as endangered, clearing the way for groups to pressure the aquarium to retire her from performing and send her back to the waters off Washington state where they will try to reunite her with her family. (Photo by Andrew Innerarity/Reuters)

Lolita the Killer Whale and a trainer perform during a show at the Miami Seaquarium in Miami January 21, 2015. (Photo by Andrew Innerarity/Reuters)

Kilimanjaro is seen behind an elephant in Amboseli National park January 26, 2015. (Photo by Goran Tomasevic/Reuters)

A female olive baboon holds her baby in Amboseli National Park January 26, 2015. (Photo by Goran Tomasevic/Reuters)

Lemurs eat at Qingdao Forest Wildlife World in Qingdao, Shandong province, January 27, 2015. (Photo by Reuters/China Daily)

Giant Panda mom Mei Xiang (top) pins her cub Bao Bao (bottom) during a wrestling match in the snow at the Smithsonian National Zoo in Washington January 27, 2015. A blizzard swept across the northeastern United States on Tuesday, dropping as much as 2 feet (60 cm) of snow across Massachusetts and Connecticut even as its impact on New York City fell short of dire predictions. (Photo by Gary Cameron/Reuters)

Panda cub Bao Bao tumbles through snow covered bamboo while playing at the Smithsonian National Zoo in Washington January 27, 2015. (Photo by Gary Cameron/Reuters)

Giant Panda mom Mei Xiang (L) and her cub Bao Bao (R) wrestle in the snow at the Smithsonian National Zoo in Washington January 27, 2015. (Photo by Gary Cameron/Reuters)

A rescued California sea lion pup looks up from her holding pen at Sea World San Diego in San Diego, California January 28, 2015. Over 50 malnourished sea lion pups have had to be rescued along the coast in San Diego since the beginning of the year. (Photo by Mike Blake/Reuters)

A rescued California sea lion pup enjoys a fish during feeding time at Sea World San Diego in San Diego, California January 28, 2015. (Photo by Mike Blake/Reuters)

In this handout image provided by SeaWorld San Diego, California sea lion pups recover at SeaWorld San Diego's Animal Rescue Center January 27, 2015 in San Diego, California. The marine park, along with other rehabilitation facilities along the California coastline, is seeing a dramatic increase in the number of ailing sea lions stranded on beaches this year. The young animals, six to eight months old, are found extremely lethargic, malnourished and dehydrated. It's not known with certainty why the region is seeing a larger number of strandings this early in 2015, however, there could be insufficient food sources for the sea lions. SeaWorld San Diego has rescued 62 marine mammals since Jan. 1, and 60 of those are California sea lions. (Photo by Mike Aguilera/SeaWorld San Diego via Getty Images)

A Scarlet macaw (Ara macao) hangs upside down in its enclosure at the zoo in the Valley of Juarez January 29, 2015. (Photo by Jose Luis Gonzalez/Reuters)

A Burchell's zebra looks into the camera at the zoo in the Valley of Juarez January 29, 2015. (Photo by Jose Luis Gonzalez/Reuters)

Two jaguars (Panthera onca) mate at the zoo in the Valley of Juarez January 29, 2015. (Photo by Jose Luis Gonzalez/Reuters)

An alligator is pictured at the zoo in Los Angeles, California January 28, 2015. Picture taken January 28, 2015. (Photo by Mario Anzuoni/Reuters)

A gorilla yawns in its enclosure at the zoo in Los Angeles, California January 28, 2015. Picture taken January 28, 2015. (Photo by Mario Anzuoni/Reuters)

Two gorillas are pictured in their enclosure at the zoo in Los Angeles, California January 28, 2015. Picture taken January 28, 2015. (Photo by Mario Anzuoni/Reuters)

A koala sleeps on a tree branch in its enclosure at the zoo in Los Angeles, California January 28, 2015. Picture taken January 28, 2015. (Photo by Mario Anzuoni/Reuters)

Wallabies are pictured in their enclosure at the zoo in Los Angeles, California January 28, 2015. Picture taken January 28, 2015. (Photo by Mario Anzuoni/Reuters)

An animal lover shows the lizard during gathering with the community on January 25, 2015 in Jakarta, Indonesia. Animal lovers invite people to love and protect all reptiles of poaching in order to avoid extinction. (Photo by Jefta Images/Barcroft Media)

An animal lover shows the Sunda slow loris during gathering with the community on January 25, 2015 in Jakarta, Indonesia. Animal lovers invite people to love and protect all reptiles of poaching in order to avoid extinction. (Photo by Jefta Images/Barcroft Media)

Forest officials transport food for elephants on elephant back at Kaziranga National Park on January 22, 2015. Elephants are one of the major attractions at Kaziranga National Park, which is home to approximately 1300 of the animals. Elephant back safaris are a popular means of touring the wildlife reserve, which also boasts the highest density of tigers per square kilometer in the world. (Photo by UB Photos/Barcroft India)

A flock of coloured pigeons fly during a pigeon-breeding competition in the southern Spanish village of Bollullos de la Mitacion, on January 27, 2015. During competition a single dove is chased by dozens of pigeon cocks resulting winner the male which courts the hen for longer. (Photo by Cristina Quicler/AFP Photo)

Bingo the donkey takes shelter atop Divis mountain on January 29, 2015 in Belfast, United Kingdom. Continued snow fall and freezing conditions are affecting the road and rail networks across Northern Ireland and the northern part of the UK. (Photo by Charles McQuillan/Getty Images)

Sled dog during the presentation of a Husky rehabilitation program for disabled youths, in Moscow's Sokolniki park, Russia January 29, 2015. (Photo by Yuri Kochetkov/EPA)

A squirrel looks out of the hollow in a snow covered park after snowfall in Minsk, Belarus, Friday, January 23, 2015. Belarus capital was hit by heavy snowfall on Friday morning, as temperatures stay 0 degrees Celsius (32 Fahrenheit). (Photo by Sergei Grits/AP Photo)

A lion-tailed macaque watches out of his hairy mane on a cold Friday, January 23, 2015 at the zoo in Cologne, Germany. (Photo by Martin Meissner/AP Photo)

A European wildcat hides and sleeps in a hole at the zoo in Duisburg, Germany, Friday, January 30, 2015. Germany currently faces snowfall and temperatures around the freezing point. (Photo by Frank Augstein/AP Photo)

A European eagle owl prances in its new outdoor enclosure at the zoo in Duisburg, Germany, Friday, January 30, 2015. Two of these in danger of extinction birds are newly hosted by the zoo. (Photo by Frank Augstein/AP Photo)

This is the adorable moment a baby orang-utan was seen showing daddy its boo-boo after hurting itself whilst playing. Captured in a sequence of lovable images, the youngster is seen holding out its hand before it gets dad to kiss it better. The tender moment was seen at Moscow Zoo, after the little one managed to take a tumble whilst swinging on its tyre. Fortunately, with a little love from Dad and a magic kiss to make it better, the perky primate was back on its feet in no time. (Photo by Olga Dmitrieva/Caters News)

A picture taken on January 28, 2015 shows stray dogs, among the 450 which have found shelter and food in improvised shelter operated only by volunteer in Nis, 200 km south of Belgrade. (Photo by Andrej Isakovic/AFP Photo)

This is the moment a polar bear was seen practising its best goalkeeper skills during an energetic game of food-ball. Seen with its arms outstretched, the adorable bear managed to make a big splash with tourists by successfully catching the ball in mid-air. The lovable playtime was captured by Austrian photographer, Jutta Kirchner, 75, who watched the mammal swim excitedly before the ball was thrown into its enclosure at Vienna Zoo. (Photo by Jutta Kirchner/Caters News)

Friends Sean Warlick, right, and Anna Nelson, center, both of Washington, D.C. watch as their dogs Sophie, a rottweiler/Australian lab mix, right, and Java, a golden doodle, left, play with a friend's dog Willow, an Alaskan Malmute, center, in Stanton Park on Capitol Hill on January 27, 2015 in Washington, DC. (Photo by Andrew Harnik/The Washington Post)

A picture made available on 23 January 2014 shows seven-years old male gorilla Ubongo resting in his facilities at Loro Parque Zoo in Puerto de la Cruz city, Tenerife Island, Canary Islands, southwestern Spain, 22 January 2015. Ubongo and Kiburi, a ten years old male gorilla, came from Hannover Adventure Zoo to join the five-gorilla population of the Canary zoo. (Photo by Ramon De La Rocha/EPA)

A rare baby rhinoceros has been born at Copenhagen Zoo in Denmark, on January 28, 2015. The healthy calf is the first to be born there for 35 years. The adorable creature weighed 50kg at birth and will be given time alone with her mother before public viewings. Rhinos are among the world's most endangered species, largely due to poaching to harvest their horns. (Photo by Frank Ronsholt/Splash News)

A park ranger stands next to a nothern white female rhinoceros named Najin at Ol Pejeta Conservancy, some 290 kms north of the Kenyan capital, Nairobi, on January 27, 2015. Najin is one of only five members of the sub-species left on the planet, three of which reside at Ol Pejeta Conservancy. Conservationists and scientists met in Kenya this week to come up with a last ditch plan to save the northern white rhinoceros from extinction. (Photo by Tony Karumba/AFP Photo)