Two meerkats receive Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A lemur receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

Two sealions kiss each other during the Christmas celebration at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

Lemurs receive Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A lemur receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

Lemurs receive Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

Lemurs receive Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A lemur receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A sealion receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A sealion receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A lemur receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A lemur receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)

A meerkat receives Christmas treats from their keepers at ZSL Whipsnade Zoo in Whipsnade, near Dunstable in Bedfordshire, England, Dec. 18, 2012. ZSL Whipsnade Zoo, formerly known as Whipsnade Wild Animal Park, is one of Europe's largest wildlife conservation parks, owned by the Zoological Society of London (ZSL), a charity devoted to the worldwide conservation of animals and their habitats. It is home to 2,955 animals, many of which are endangered in the wild. (Xinhua/Wang Lili)