(AP) - In this photo provided by the Wildlife Conservation Society, a young Wolf’s guenon plays with its mother inside the indoor Congo Gorilla Forest at the Bronx Zoo, Thursday, Nov. 6, 2008 in New York. The guenon, whose gender is yet to be determined, was born Sept. 29, 2008. (AP Photo/WCS, Julie Larsen Maher)

(AP) - Auckland Zoo giraffe, Ntombi peers out of her truck on her way to the Ports of Auckland to be loaded onto a ship bound for Australia, in Auckland, New Zealand, Thursday, Nov. 20, 2008. Ntombi was joined by her half-brother Forrest for the journey to Australia where they are part of the Australasian regional breeding programme, and will fulfil a vital role in the future of their 'genetically valuable' bloodline. (AP Photo/New Zealand Herald, Paul Estcourt)

(AP) - Head nursery keeper Dawn Strasser plays with one of three three-week-old cheetah cub she was bottle feeding at the Cincinnati Zoo, Thursday, Nov. 20, 2008, in Cincinnati. Two of the cubs will be sent to the Columbus, Ohio, zoo and the third will remain in Cincinnati. (AP Photo/Al Behrman)

(AP) - Head nursery keeper Dawn Strasser bottle feeds three three-week-old cheetah cubs at the Cincinnati Zoo, Thursday, Nov. 20, 2008, in Cincinnati. Two of the cubs will be sent to the Columbus, Ohio, zoo while the third will remain in Cincinnati. (AP Photo/Al Behrman)

(Reuters) - Two camels from the Zurich Zoo stand in front of the Swiss Parliament in Bern during an event to promote the construction of a cable car to the Zurich Zoo in Zurich November 20, 2008. REUTERS/Ruben Sprich (SWITZERLAND)

(Reuters) - A chameleon sits on a tree at the zoo in Zurich November 19, 2008. REUTERS/Arnd Wiegmann (SWITZERLAND)

(Reuters) - A chameleon sits on a tree at the zoo in Zurich November 19, 2008. REUTERS/Arnd Wiegmann (SWITZERLAND)

(AFP/Assiniboine Park Zoo) - This photo released by the Assiniboine Park Zoo shows Debby the polar bear. Debby, the world's oldest polar bear, orphaned as a cub in the cold Russian north and raised in captivity, has died aged 42 after thrilling millions of visitors to a Canadian zoo, officials said.(AFP/Assiniboine Park Zoo/Darlene Stack)

(AFP/City of Winnipeg) - This undated photo released by of the City of Winnipeg shows Debby the polar bear at the Assiniboine Park Zoo. Debby, the world's oldest polar bear, orphaned as a cub in the cold Russian north and raised in captivity, has died aged 42 after thrilling millions of visitors to a Canadian zoo, officials said.(AFP/City of Winnipeg/Darlene Stack)

(Reuters) - A zebra looks at visitors from its cage at Ghamadan zoo near Amman November 18, 2008. REUTERS/Ali Jarekji (JORDAN)

(Reuters) - An African leopard looks out at visitors from its cage at Ghamadan zoo near Amman November 18, 2008. REUTERS/Ali Jarekji (JORDAN)

(Reuters) - An African leopard looks out at visitors from its cage at Ghamadan zoo near Amman November 18, 2008. REUTERS/Ali Jarekji (JORDAN)

(Reuters) - A lion looks at visitors from its cage at Ghamadan zoo near Amman November 18, 2008. REUTERS/Ali Jarekji (JORDAN)

(Reuters) - A one-year-old Australian Fur Seal is seen stranded on a city beach in Melbourne November 18, 2008. Vets from the Melbourne Zoo will take the seal back to the zoo to anesthetize it and check for any injuries. If the seal is found to be starving instead of injured, it will be euthanized, as the vets do not want to interfere with the natural selection process. REUTERS/Mick Tsikas (AUSTRALIA)

(Reuters) - Vets from the Melbourne Zoo capture a one-year-old Australian Fur Seal that had stranded itself on a city beach in Melbourne November 18, 2008. The vets will take the seal back to the zoo to anesthetize it and check for any injuries. If the seal is found to be starving instead of injured, it will be euthanized as the vets do not want to interfere with the natural selection process. REUTERS/Mick Tsikas (AUSTRALIA)

(AP) - Juhi, a tiger cub named after a fragrant white flower native to India, is attended to by veterinarians at the zoo in Nagpur, India, Monday, Nov. 17, 2008. Veterinarians carried out a rare blood transfusion late Sunday on the wild tiger in a bid to save the abandoned 7-month-old cub that had been attacked and beaten by angry villagers in central India, officials said Monday. (AP Photo)

(AP) - Juhi, a tiger cub named after a fragrant white flower native to India, is given a blood transfusion at the zoo in Nagpur, India, on Sunday, Nov. 16, 2008. Veterinarians carried out a rare blood transfusion late Sunday on the wild tiger in a bid to save the abandoned 7-month-old cub that had been attacked and beaten by angry villagers in central India, officials said Monday. (AP Photo)

(AP) - Juhi, a tiger cub named after a fragrant white flower native to India, is seen at the zoo in Nagpur, India, on Nov. 13, 2008. Veterinarians carried out a rare blood transfusion late Sunday, Nov. 15, 2008 on the wild tiger in a bid to save the abandoned 7-month-old cub that had been attacked and beaten by angry villagers in central India, officials said Monday. (AP Photo)

(AP) - Pamela Anzalotti holds flowers following a memorial held for Mac the elephant Saturday Nov. 15, 2008 in Houston. Nearly a hundred people, and two mourning elephants, watched Saturday as the Houston Zoo said goodbye to Mac, a popular 2-year-old Asian elephant who died this week hours after suddenly contracting elephant herpesvirus. (AP Photo/Houston Chronicle, Eric Kayne)

(AP) - Deborah Cannon, President of the Houston Zoo, addresses a gathering for a memorial held for Mac the elephant Saturday Nov. 15, 2008 in Houston. Nearly a hundred people, and two mourning elephants, watched Saturday as the Houston Zoo said goodbye to Mac, a popular 2-year-old Asian elephant who died this week hours after suddenly contracting elephant herpesvirus. (AP Photo/Houston Chronicle, Eric Kayne)

(AP) - Zoo docents Michelle Hodgson, left, and Diane Blom listen as a memorial is held for Mac the elephant Saturday Nov. 15, 2008 in Houston. Nearly a hundred people, and two mourning elephants, watched Saturday as the Houston Zoo said goodbye to Mac, a popular 2-year-old Asian elephant who died this week hours after suddenly contracting elephant herpesvirus. (AP Photo/Houston Chronicle, Eric Kayne)

(Reuters) - A brown bear climbs a tree in its enclosure at Basel Zoo November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - A crab-eating macaque suckles her young in their enclosure at Basel zoo November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - A young crab-eating macaque is carried by his mother in their enclosure at Basel zoo November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - An orangutan eats leaves as he sits in his enclosure at Basel's Zoo, November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - Eight-day old hippopotamus Farasi is pictured in his enclosure at Basel's Zoo, November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - Eight-day old hippopotamus Farasi plays with his mother Helvetia at Basel's Zoo, November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - Eight-day old hippopotamus Farasi is pictured next to his mother Helvetia at Basel's Zoo, November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - Eight-day old hippopotamus baby Farasi plays with his mother Helvetia at Basel's Zoo, November 14, 2008. REUTERS/Christian Hartmann (SWITZERLAND)

(Reuters) - Ho Ching, Executive Director and Chief Executive of Temasek Holdings, and wife of Singapore's Prime Minister Lee Hsien Loong, holds a parrot after officially opening the new Rainforest Kidzworld children's attraction at Singapore Zoo November 14, 2008. REUTERS/Rob Dawson (SINGAPORE)

(AP) - Clyde, a 315-pound orangutan, studies the oregano he found in his habitat on Thursday, Nov. 13, 2008, at the San Diego Zoo. The oregano was one of several culinary herbs that were scattered around his exhibit in celebration of Great Ape Awareness Days at the Zoo. After examining the herbs some of the Orangutans ate them.(AP Photo/Ken Bohn/San Diego Zoo)

(AP) - This undated image provided by the San Diego Zoo shows a yet-unnamed baby gorilla being held by an unidentified zoo employee, that was born Sept. 7, 2008 in San Diego. (AP Photo/San Diego Zoo)

(AP) - This undated image provided by the San Diego Zoo shows a yet-unnamed baby gorilla, born Sept. 7, 2008 in San Diego. (AP Photo/San Diego Zoo)

(AP) - This image provided by the San Diego Zoo shows a yet-unnamed baby gorilla, born Sept. 7, 2008 in San Diego. (AP Photo/San Diego Zoo)

(AFP/File) - A wallaby baby and its mother are pictured at a zoo in France. An intrepid wallaby that escaped from its pen at an exotic zoo and went on an 80-kilometer (50-mile) walkabout across eastern Canada was found dead on the side of a road Thursday, zookeepers said.(AFP/File/Johanna Leguerre)

(Reuters) - A Lama licks the fence at the zoo of Hamm November 13, 2008. REUTERS/Ina Fassbender (GERMANY)

(Reuters) - A Grey Crowned Crane is pictured at the zoo of Hamm November 13, 2008. REUTERS/Ina Fassbender (GERMANY)

(Reuters) - A Grey Crowned Crane is pictured at the zoo of Hamm November 13, 2008. REUTERS/ Ina Fassbender (GERMANY)

(Reuters) - Siberian tiger mother 'Shakyra' licks one of her babies at the zoo of Hamm November 13, 2008. The birth of five tiger babies on August 13 in the zoo of Hamm was unexpected, because it was unknown that their mother 'Shakyra' was pregnant. REUTERS/ Ina Fassbender (GERMANY)

(Reuters) - Two three month old Siberian tiger babies play in their enclosure at the zoo of Hamm November 13, 2008. The birth of five tiger babies on August 13 in the zoo of Hamm was unexpected, because it was unknown that their mother 'Shakyra' was pregnant. REUTERS/ Ina Fassbender (GERMANY)

(Reuters) - Two three month old Siberian tiger babies play in their enclosure at the zoo of Hamm November 13, 2008. The birth of five tiger babies on August 13 in the zoo of Hamm was unexpected, because it was unknown that their mother 'Shakyra' was pregnant. REUTERS/ Ina Fassbender (GERMANY)

(Reuters) - A peacock shows its feathers, while two female peacocks eat grass at the zoo of Hamm November 13, 2008. REUTERS/Ina Fassbender (GERMANY)

(Reuters) - A peacock shows its feathers at the zoo of Hamm November 13, 2008. REUTERS/Ina Fassbender (GERMANY)

(AP) - A zookeeper crawls under a barrier at the White Tiger enclosure which is being cordoned off to public on Thursday Nov. 13, 2008 in Singapore. A newspaper says three Bengal white tigers have mauled to death a Singapore Zoo cleaner who fell into a moat surrounding their enclosure.(AP Photo/ Wong Maye-E)

(AP) - A visitor to the Singapore Zoo looks into the White Tiger enclosure which is being cordoned off to public on Thursday Nov. 13, 2008 in Singapore. A newspaper says three Bengal white tigers have mauled to death a Singapore Zoo cleaner who fell into a moat surrounding their enclosure.(AP Photo/ Wong Maye-E)

(AP) - People make their way into the Singapore Zoo on Thursday Nov. 13, 2008 in Singapore. A newspaper says three Bengal white tigers have mauled to death a Singapore Zoo cleaner who fell into a moat surrounding their enclosure.(AP Photo/ Wong Maye-E)

(Reuters) - Tourists look at an empty white tiger enclosure at the Singapore Zoo November 13, 2008 after a man was mauled to death there. Nordin Bin Montong, 32, a Malaysian working as a cleaner at the zoo, leapt into the moat of the white tiger exhibit and was attacked by the three white tigers, said Biswajit Guha, assistant director of zoology at the Singapore Zoo in a statement on Thursday. REUTERS/Tim Chong (SINGAPORE)

(Reuters) - Police leave the white tiger enclosure at the Singapore Zoo November 13, 2008 after collecting evidence. Three white tigers mauled a Malaysian to death in Singapore's zoo on Thursday after the man jumped into their enclosure, a zoo official said. Nordin Bin Montong, 32, a Malaysian working as a cleaner at the zoo, leapt into the moat of the white tiger exhibit and was attacked, said Biswajit Guha, assistant director of zoology at the Singapore Zoo in a statement. REUTERS/Tim Chong (SINGAPORE)

(Reuters) - Police leave the white tiger enclosure at the Singapore Zoo November 13, 2008 after collecting evidence. Three white tigers mauled a Malaysian to death in Singapore's zoo on Thursday after the man jumped into their enclosure, a zoo official said. Nordin Bin Montong, 32, a Malaysian working as a cleaner at the zoo, leapt into the moat of the white tiger exhibit and was attacked, said Biswajit Guha, assistant director of zoology at the Singapore Zoo in a statement. REUTERS/Tim Chong (SINGAPORE)

(Reuters) - Tourists look at an empty white tiger enclosure at the Singapore Zoo November 13, 2008 after a man was mauled to death there. Nordin Bin Montong, 32, a Malaysian working as a cleaner at the zoo, leapt into the moat of the white tiger exhibit and was attacked by the three white tigers, said Biswajit Guha, assistant director of zoology at the Singapore Zoo in a statement on Thursday. REUTERS/Tim Chong (SINGAPORE)