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A snowy owl sits in its compound at the zoological garden during low temperatures in Hof, southern Germany, Tuesday, Nov. 5, 2013. (AP Photo/dpa, David Ebener)
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A three-month-old Sumatran tiger cub named "Bandar" reacts after being dunked in the tiger exhibit moat for a swimming test at the National Zoo in Washington, Wednesday, Nov. 6, 2013. (AP Photo/Manuel Balce Ceneta, File)
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Barn Owl chicks (chouette-effraie) are pictured at the zoo of the French eastern city of Amneville, on July 8, 2013. (JEAN-CHRISTOPHE VERHAEGEN/AFP/Getty Images)
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This photo, made Wednesday, Oct. 9, 2013, shows a baby hippo, foreground, that was born Oct. 3 at the Gulf Breeze Zoo in Gulf Breeze, Florida. (AP Photo/Northwest Florida Daily News, Nick Tomecek)
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New-born gorilla NAikais is held in the arms of its mother in Burgers Zoo in Arnhem, The Netherlands, on November 28, 2013. (ROBIN UTRECHT/AFP/Getty Images)
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A cheetah walks in the snow at Mulhouse zoo, on February 12, 2013. (SEBASTIEN BOZON/AFP/Getty Images)
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Hundreds of Scarlet macaws (Ara macaw) are released at Xcaret park, in the Mayan Riviera, near Playa del Carmen city, Mexico on April 25, 2013. (ELIZABETH RUIZ/AFP/Getty Images)
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An Amur tiger lies in the snow at the Calgary Zoo in Calgary, Canada on Thursday, Nov. 28, 2013. (AP Photo/The Canadian Press, Jeff McIntosh)
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A bee collects pollen from a yellow flower on May 17, 2013 in Baghdad. (ALI AL-SAADI/AFP/Getty Images)
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Camels walk along sand dunes in the Liwa desert, 220 kms west of Abu Dhabi, as the Mazayin Dhafra Camel Festival takes place on December 22, 2013. (AFP PHOTO/KARIM SAHIB)
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Seagulls fly in Ipanema beach on a cloudy day in Rio de Janeiro, on November 30, 2013 Brazil. (CHRISTOPHE SIMON/AFP/Getty Images)
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A Southern right whale slaps its tail near the shore of Muizenberg Beach in False Bay, Cape Town on October 11, 2013. (JENNIFER BRUCE/AFP/Getty Images)
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A white-handed gibbon, yet to be named, clings to his mother 24-year-old Phoenice, Thursday, Nov. 21, 2013, at the Philadelphia Zoo. (AP Photo/Matt Rourke)
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A falcon flies over the Liwa desert, 220 kms west of Abu Dhabi, on the sidelines of the Mazayin Dhafra Camel Festival on December 21, 2013. (KARIM SAHIB/AFP/Getty Images)
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A Southern right whale breaches near the shore of Muizenberg Beach in False Bay, Cape Town on October 11, 2013. (JENNIFER BRUCE/AFP/Getty Images)
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A six-month old female liliger cub Eva plays in the snow in a Zoo in Novosibirsk, Russia, Thursday, Dec. 5, 2013. (AP Photo /Ilnar Salakhiev)
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A pink flamingo is seen on October 3, 2013 at the Zoological Center of Antwerp. (JOHN THYS/AFP/Getty Images)
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In this Monday, Sept. 23, 2013 photo, fourteen panda cubs are arranged in a crib for photos as they are shown to the public at the Giant Panda Breeding and Research Base in Chengdu, in southwest China's Sichuan province. (AP Photo)
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A female Bornean orangutan named Dam is seen with her newborn son Veera at the Singapore Zoo on March 6, 2013. (ROSLAN RAHMAN/AFP/Getty Images)
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A picture taken on March 8, 2013 shows horses in a field along the border between Syria and Israel, in the Golan Heights. (JACK GUEZ/AFP/Getty Images)
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Snails are pictured at the 'Snail Garden' farm in Krasin, northern Poland, on May 29, 2013. (JANEK SKARZYNSKI/AFP/Getty Images)
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A herd of wild elephants from the nearby Rani Forest reserve eat water hyacinths in the wetlands at Deepor Beel on the outskirts of Guwahati on August 24, 2013. (BIJU BORO/AFP/Getty Images)
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The hamadryas baboons behave strangely at the Emmen Zoo in Emmen, inNetherlands, on July 31, 2013. (VINCENT JANNINK/AFP/Getty Images)
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Northern gannets congregate on the Lummen cliffs, where thousands of the birds have made their home, on August 3, 2013 on Helgoland Island, Germany. (Photo by Sean Gallup/Getty Images)
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Puffins return to their summer breeding grounds on the Farne Islands as National Trust rangers carry out a Puffin census on May 16, 2013 in the Farne Islands, England. (Photo by Jeff J Mitchell/Getty Images)
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A polar bear shakes off the water while he swims in the pool of its enclosure in the zoo of Hannover, northern Germany, Friday March 15, 2013. (AP Photo/dpa, Jochen Luebke)
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Japanese macaque monkeys huddle together in a group to protect themselves against the cold weather at Awajishima Monkey Center on January 26, 2013 in Sumoto, Hyogo Prefecture, Japan. (Photo by Buddhika Weerasinghe/Getty Images)
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A Sri Lankan elephant bathes in a pond at Gangarama temple in Colombo on June 2, 2013. (Ishara S.KODIKARA/AFP/Getty Images)
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A poisonous frog (Phyllobates bicolor) is shown in Santa Fe Zoo, in Medellin, Colombia, on January 15, 2013. (FREDY AMARILES/AFP/Getty Images)
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In this Tuesday, Jan. 8, 2013 photo provided by Marina Lacasse, a killer whale surfaces through a small hole in the ice near Inukjuak, in Northern Quebec. (Marina Lacasse, The Canadian Press / AP)