Сhicks of wild goose looking for food accompanied by her mother, in the background, in a park of Dusseldorf, Germany, on April 11, 2013. (Photo by Federico Gambarini/AFP Photo/Dpa)

New born camel “Amelia” is seen with her mother at the Bioparco Zoo on April 10, 2013 in Rome, Italy. Amelia, a female Bactrian camel, was born on March 25, 2013. (Photo by Tiziana Fabi/AFP Photo)

Visitors get a closer look of the dolphins at the marine life park South East Asia world’s largest aquarium at Resort World Sentosa in Singapore, on April 9, 2013. Resorts World Sentosa’s S.E.A. Aquarium is now the official record holder of two Guinness World Records , the largest aquarium and largest acrylic panel. (Photo by Roslan Rahman/AFP Photo)

A male pit bull tries to chew through his kennel before being transported to Boise, on April 8, 2013. Authorities have removed and shipped more than 60 pit bulls from the scene of a triple slaying in southeast Idaho's Oneida County. Most of the dogs were transported to the Idaho Humane Society in Boise for treatment and potential placement in new homes. (Photo by Doug Lindley/Idaho State Journal)

Guilford County Animal Control officer E. Afari carries a loose pig to his truck after catching it in Greensboro, N.C., on April 11, 2013. Citizens in the area called police after seeing the animal roaming around the area. Another animal control officer who originally responded to the scene kept the pig calm in a grassy area until Afari arrived to assist. (Photo by Nelson Kepley/News & Record)

A bird makes a nest near Diani Beach on the Indian Ocean coast of Kenya, some 30 km (19 miles) south of Mombasa, on April 9, 2013. (Photo by Goran Tomasevic/Reuters)

An international team of scientists discovered a cache of dinosaur embryos near the city of Lufeng, in Yunnan, China. Estimated to be 190 million years old, the fossilized bones are among the oldest dinosaur embryos in the world. In undated photos, embryonic humerus, as it is preserved in the sediments, is seen at right, and a preserved thigh bone is seen in cross section at left. The purple color is caused by the lamba filter used for effective visualization. The honeycomb like external area is embryonic bone tissue with large primary spaces for blood vessels, bone making cells called osteoblasts, and other soft tissues needed for growth. The central portion is the medullary cavity, in this case filled with crystals that formed during fossilization. (Photo by University of Toronto)

A woman feeds pigeons at Muslim area in Yangon. An ultra-nationalist Buddhist creed is becoming more visible in Myanmar's commercial capital, Yangon, after monks from the apartheid-like movement helped stoke a wave of anti-Muslim violence in the central heartlands. Many Muslims in the city say they are living in fear after dozens of members of their faith were killed in March by Buddhist mobs whipped up by monks from the “969” movement, a name that refers to attributes of the Buddha, his teachings and the monkhood. (Photo by Soe Zeya Tun/Reuters)

A breeder covers his face as he sits behind his chickens, which according to the breeder are not infected with the H7N9 virus, in Yuxin township, Zhejiang province, April 11, 2013. According to chicken breeders, their businesses are strongly affected as all six local poultry markets in Yuxin are closed for preventing the transmission of the H7N9 virus. Nine people have died out of 33 confirmed cases of the virus, all in eastern China, according to data from the National Health and Family Planning Commission. State media quoted authorities as saying a vaccine should be ready within months. (Photo by William Hong/Reuters)

An elephant sprays water at children in celebration of the Songkran water festival in Thailand's Ayutthaya province, about 80 km (50 miles) north of Bangkok, April 12, 2013. Songkran, the most celebrated festival of the year, marks the start of Thailand's traditional New Year. (Photo by Chaiwat Subprasom/Reuters)

Aurora, a three-year-old female polar bear, swims in a pool for the first time in the season at the Royev Ruchey Zoo in a surburb of Russia's Siberian city of Krasnoyarsk, April 12, 2013. Two female polar bear cubs, Aurora and Victoria, were found without their mother in Russia's Taimyr Peninsula on the Arctic Ocean coast in May 2010 and were later brought to the Zoo in Krasnoyarsk. (Photo by Ilya Naymushin/Reuters)

This picture taken on April 10, 2013 shows a newly born two-headed pig in a village in Jiujiang, east China's Jiangxi province. A local veterinarian said it is was suffering a rare deformity and would find it difficult to survive. (Photo by AFP Photo)

A chicken is kept in a cage waiting to be inspected by health workers in Hong Kong, on April 11, 2013. The government started enhanced measures to prevent a new strain of bird flu from entering the city. (Photo by Vincent Yu/Associated Press)

North Korean soldiers with military dogs take part in drills in an unknown location in this picture taken on April 6, 2013 and released by North Korea's official KCNA news agency in Pyongyang on April 7, 2013. (Photo by Reuters/KCNA)

Hera, a six-month-old lion cub, runs out of a cage as it is released at Lionsrock Big Cat Sanctuary April 11, 2013. Four Paws Animal Welfare Foundation transferred 4 lions and 2 tigers from a Zoo in Onesti, Romania to Lionsock Big Cat Sanctuary in South Africa after the Zoo was closed down. More than 100 felines from around the world like lions, tigers, cheetahs or caracals that were originally from Zoos, circuses or kept in illegal captivity are hosted and cared for by Four Paws in their 1,242-hectare sanctuary. (Photo by Mihai Vasile/Reuters/Four Paws)

A leopard runs to at people as they run for cover in Katmandu, Nepal, on April 10, 2013. According to reports, 15 people were injured including three policemen and two officials from the Department of Forest. The leopard was later killed with the help of Nepalese policemen and local media. (Photo by Niranjan Shrestha/Associated Press)

People stomp on the dead leopard after it was captured in Katmandu, Nepal, on April 10, 2013. (Photo by Niranjan Shrestha)

People carry the dead leopard who attacked locals in Katmandu, Nepal, on April 10, 2013. (Photo by Niranjan Shrestha/Associated Press)

A herd of deers runs trough a snowy field in a village near Czestochowa, southern Poland at sunset on April 7, 2013. (Photo by Janek Skarzynski/AFP Photo)

Wild game of deer is arranged in a line at a demonstration place called “Streckenplatz” after a driven hunt event at a U.S. military training area in Hohenfels near Regensburg December 14, 2012. The hunt takes place during the closed season for hunting game at one of Germany's biggest military training ground on about 16,000 hectares. Picture taken December 14, 2012. (Photo by Michaela Rehle/Reuters)

A Norwegian forest cat is held by its owner during an international feline beauty competition in Bucharest, Romania, on April 6, 2013. (Photo by Vadim Ghirda/Associated Press)

A Sphynx cat waits to be evaluated by a judge during an international feline beauty competition in Bucharest, Romania, Saturday, April 6, 2013. The contest, far less enjoyed by the cats than by the numerous visitors, was entered by more than 200 felines. (Photo by Vadim Ghirda/AP Photo)

Two young Sichuan takins relax in the Berlin Zoo on April 9, 2013. Takins are goat-antelopes found in the eastern Himalayas. (Photo by Jan-Philipp Strobel/AFP Photo)

In this March 24, 2013 photo, distributed by RIA Novosti Agency on Wednesday, April 10, 2013, Russian President Vladimir Putin poses for the camera as he plays with his dogs Yume, an Akito-Inu, front, and Buffy, a Bulgarian Shepherd in an undisclosed location of Moscow region.(Photo by Alexei Druzhinin/AP Photo/RIA Novosti/Presidential Press Service)

An 8-inch-long (20,32 cm) banana slug slowly crosses a country road on a rainy morning near Elkton, Oregon, on April 7, 2013. (Photo by Robin Loznak)

A Canadian sphynx cat waits for its turn to be evaluated by a judge during an international feline beauty competition in Bucharest, Romania, on April 6, 2013. (Photo by Vadim Ghirda/AP Photo)

Jockey Davy Condon (left, in white) struggles to stay aboard Jamsie Hall at the 11th fence in the fourth race of the day of The Topham Steeplechase at Aintree, northern England, on April 6, 2013. (Photo by Russell Cheyne/Reuters)

Male Sumatran tiger “Iban” yawns in its enclosure in the Frankfurt Zoo Monday April 8, 2013. Weather forecasts predict rising temperatures and rainy weather for the next few days in Germany. (Photo by Boris Roessler/AP Photo/Dpa)