Children watch Bianca, a loggerhead sea turtle, swim in her tank during her recovery process at the Loggerhead Marinelife Center, during Turtlefest in Juno Beach, on April 5, 2014. The 11th annual event featured educational programs, live music and food. The sea turtle nesting season began March 1 and ends October 31. (Photo by Greg Lovett/The Palm Beach Post)

A group of ring-tailed lemurs from Madagascar show themselves for the first time outside the enclosure in Avifauna Bird Park in Alphen aan den Rijn, The Netherlands, 09 April 2014. The park remains the first and largest bird park in the Netherlands, but has added other animals to its unique collection. (Photo by Bas Czerwinski/EPA)

A dog rests on a pillow while people celebrate International Pillow Fight Day at Washington Square Park in New York April 5, 2014. (Photo by Eduardo Munoz/Reuters)

Vultures are seen in a bird-cage at the Paris Zoological Park in the Bois de Vincennes in the east of Paris April 8, 2014. Inaugurated in 1934, the Paris Zoo will reopen for the public on April 12, 2014 after being closed for four-years for renovation, transforming the zoo with new quarters for animals and greater information for visitors about the animals and their environment. (Photo by Charles Platiau/Reuters)

A brown bear cubs plays with it's mother Ursina in their enclosure at Juraparc animal park near Vallorbe April 7, 2014. Ursina, an 18-year old female bear gave birth to two cubs, King and Zoe, the twelfth and thirteenth cubs of the park, on an unknown date in January 2014. The parent bears were separated before the birth to avoid conflict between the father and cubs. (Photo by Denis Balibouse/Reuters)

Two brown bear cubs play in their enclosure at Juraparc of Mont-d'Orzieres near Vallorbe, Switzerland, 09 April 2014. Ursina, an 18-year old female bear gave birth to two cubs, King and Zoe, on an unknown date in January 2014. The parent bears were separated before the birth to avoid conflict between the father and the cubs. (Photo by Jean-Christophe Bott/EPA)

Forest, a Labrador Retriever from Commerce Township, Mich., competes in the Diving Dog competition of the Purina Pro Plan Incredible Dog Challenge at Centennial Olympic Park in Atlanta on Saturday, April 5, 2014. (Photo by John Amis/AP Images for Purina Pro Plan)

Cats are prepared to be spayed or neutered at the Washingon Human Society (WHS)Spay and Neuter Center on April 6, 2014 in Washington, DC. The feral cats are trapped, either spayed or neutered and the released back into the community. The ultimate goal is to reduce the number of unwanted animals entering adoption centers. The cost of each and every surgery is subsidized by WHS. (Photo by Mandel Ngan/AFP Photo)

Russian Orthodox Patriarch Kirill releases a white dove to mark Annunciation Day in the Kremlin in Moscow, on April 7, 2014. In Christianity, Annunciation celebrates the relevation to the Virgin Mary that she would bear a son, Jesus. (Photo by Kirill Kudryavtsev/AFP Photo)

Yaniv Levy, right, from the Israel Sea Turtle Rescue Center, and industrial design student Shlomi Gez, center, attach an artificial fin onto the back of Hofesh, an injured male green sea turtle, in Michmoret, north of Tel Aviv, on April 8, 2014. The turtle was brought to the center about four years ago missing both limbs on the left side of his body. The artificial fin will offer him stability. Hofesh will not be released back into the wild as he cannot survive if something were to happen to the fin. (Photo by Baz Ratner/Reuters)

Hofesh, an injured male green sea turtle, swims in a pool at the Israel Sea Turtle Rescue Center, in Michmoret north of Tel Aviv April 9, 2014. The turtle was brought to the centre some four years ago missing both limbs on the left-hand-side of his body, but on Wednesday an artificial fin, designed by an industrial design student, Shlomi Gez, was attached to Hofesh's back, offering him stability and a more permanent solution to his disability. (Photo by Baz Ratner/Reuters)

She Ping, a 34-year-old beekeeper, shakes off bees after an attempt to cover his body with bees in Chongqing municipality, April 9, 2014. He used queen bees to successfully attract more than 460,000 bees, weighing over 45 kg (99 lbs), within 40 minutes, local media reported. Picture taken April 9, 2014. (Photo by Reuters/China Daily)

A black and white lemur is pictured at the zoo of the French eastern city of Amneville, on April 11, 2014. (Photo by Jean-Christophe Verhaegen/AFP Photo)

Orangutan baby Awang walks past a Muscovy duck with its mother Farida in the compound at the Zoom Erlebniswelt zoo in Gelsenkirchen, Germany, 03 April 2014. The Zoom Erlebniswelt zoo celebrates the start of the season. (Photo by Roland Weihrauch/EPA)

Sharks swim above shark attack policy researcher from the University of Sydney Christopher Neff at the Sydney Aquarium April 9, 2014. Australia ranks high in global charts of shark attacks and is currently running an aggressive culling drive against the marine predator, but a new survey conducted by Neff says many Australians aren't really that worried about them although the largest shark culling drive in the world is currently under way in Western Australia, where attacks are most common. Forty-five sharks have been killed there so far this year after being caught on baited drum lines the state government wants to extend for three years. (Photo by David Gray/Reuters)

A Gelada baboon is pictured at the zoo of the French eastern city of Amneville, on April 11, 2014. (Photo by Jean-Christophe Verhaegen/AFP Photo)

Elephants spray tourists with water in celebration of the Songkran water festival in Thailand's Ayutthaya province, about 80 km (50 miles) north of Bangkok, April 9, 2014. (Photo by Rungroj Yongrit/EFE)

One of the polar bear twin cubs plays in their enclosure at Hellabrunn zoo in Munich, April 7, 2014. The cubs were born December 9, 2013. (Photo by Matthias Schrader/AP Photo)

A dog with its leg painted pink walks around, and is part of, the exhibition by French atrist Pierre Huyghe at the Ludwig Museum in Cologne, western Germany on April 10, 2014. The exhibition runs from April 11 to July 13, 2014. (Photo by Oliver Berg/AFP Photo/DPA)

Indian boys ride horses through a vegetable field during a local horse race in Dakkhin Durgapur, about 30 kilometers south of Kolkata, India, April 5, 2014. The race is held as part of festivities to mark Sitala Puja, dedicated to the pox-Goddess Sitala. (Photo by Bikas Das/AP Photo)

A pot-bellied pig enjoys the warm and sunny weather at Gut Aiderbichl in Henndorf in the Austrian province of Salzburg, Monday, April 7, 2014. Gut Aiderbichl is a place of mercy for rescued animals. Weather forecasts predict good weather conditions with mild temperatures for the upcoming days in Austria. (Photo by Kerstin Joensson/AP Photo)

In this photo taken on Tuesday, April 8, 2014, Vermont Institute of Natural Science wildlife services manager Sara Eisenhauer, right, and intern Maddy Jacobs release a rehabilitated young bald eagle along the Connecticut River in North Thetford, Vt. The bald eagle was released almost three weeks after a Vermont game warden found the bird after it had apparently been hit by a car in Danby. (Photo by Jennifer Hauck/AP Photo/Valley News)

A young goat jumps over a meadow during warm and sunny weather at Gut Aiderbichl in Henndorf in the Austrian province of Salzburg, Monday, April 7, 2014. Gut Aiderbichl is a place of mercy for rescued animals. Weather forecasts predict good weather conditions with mild temperatures for the upcoming days in Austria. (Photo by Kerstin Joensson/AP Photo)

Jimmel, an owl-faced monkey, protects her one-month old baby at the zoo in Antwerp April 10, 2014. (Photo by Yves Herman/Reuters)

Xin Bao, the fourth giant panda cub born at the Zoo Aquarium in Madrid, is seen during his first walk outside the enclosure in Madrid, Spain, 09 April 2014. Xin Bao's presentation is held after six months of his birth, once the cub has had enough autonomy and strenght to stay outside. US Ambassador James Costos and Chinese Ambassador Zhu Bangzao attended the presentation. (Photo by Diego Garcia/EPA)

A tiger yawns in its open-air enclosure at the zoo of Frankfurt Main, Germany, April 10, 2014. The tigers are one of the zoo's most popular species. (Photo by Boris Roessler/EPA)

Female polar bear cub Lale and its mother Valeska walk through the outdoor enclosure at the zoo in Bremerhaven, northern Germany, Tuesday, April 8, 2014. Lale was born on December 16, 2013 and explored the outdoor enclosure for the first time. (Photo by Carmen Jaspersen/AP Photo/DPA)

A bird sits on the back of a horse in Frumusita village, some 300km east of Bucharest, on April 6, 2014. (Photo by Daniel Mihailescu/AFP Photo)

An iguana hangs from the uniform of a Mexican soldier during the burning of marijuana, heroin, cocaine and methamphetamine at a military base in Monterrey, Nuevo Leon state April 8, 2014. The Mexican Army burnt more than 17.5 tons of drug seized to groups of drug traffickers from the north of the country, reported a military authority. (Photo by Julio Cesar Aguilar/AFP Photo)

Undated handout photo issued by Channel 4 of Britain's first cloned dog a dachshund called mini Winnie. Britain's first cloned dog has been born after a £60,000 test tube procedure, a television programme will reveal. The tiny dachshund puppy, weighing just over 1lb (454g), was born in Seoul, South Korea, at the end of last month following a competition advertised in the UK offering the procedure free of charge. The dog was copied from a 12-year-old pet called Winnie, owned by Rebecca Smith, a cook from west London. (Photo by Channel 4/PA Wire)

Zoo keeper Benjamin Krüger measures camel Saida under the watchful eyes of her mother Natascha, during the inventory at the Hagenbeck Zoo in Hamburg, Germany, on April 11, 2014. (Photo by Maja Hitij/DPA)