A young chimpanzee named Cangu pulls down Christmas sock while eating an apple inside its cage at Buenos Aires' Zoo, December 8, 2010.
An orangutan named Sandra, covered with a blanket, gestures inside its cage at Buenos Aires' Zoo, December 8, 2010.
An orangutan named Sandra looks at a Christmas gift inside its cage at Buenos Aires' Zoo, December 8, 2010.
In this Dec. 6, 2010 photo released by the Wildlife Conservation Society, a walrus named "Nuka" snacks on a holiday cake at the New York Aquarium in the Brooklyn borough of New York. Aside from being a tasty snack, the cake serves as an animal enrichment exercise. Aquarium staff introduce unusual items into an animals environment from time to time in order to provide it with mental and physical stimulation.
A sea lion, wearing reindeer antlers, smiles during a show at the Aqua Stadium aquarium at the Shinagawa Prince Hotel in Tokyo on December 13, 2010. Visitors can view the Christmas special show, which will be held through to Christmas Day.
A white-sided dolphin carries a present during a show at the Aqua Stadium aquarium at the Shinagawa Prince Hotel in Tokyo on December 13, 2010. Visitors can view the Christmas special show, which will be held through Christmas Day.
In this photo provided by the San Francisco Zoo, Uulu, a 30-year-old female polar bear enjoys the snow and enrichment treats in his exhibit, Tuesday, Dec. 21, 2010 at the San Francisco Zoo in San Francisco. Ten tons of ice was turned into snowflakes and was blown in the exhibit.
In this photo provided by the San Francisco Zoo, Uulu, a 30-year-old female polar bear enjoys the snow that was blown into her exhibit, Tuesday, Dec. 21, 2010 at the San Francisco Zoo in San Francisco.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a bear looks at a paper made snowman at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a bear plays with Christmas decorations at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a tree kangaroo eats slices of watermelon at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a tree kangaroo eats slices of watermelon at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
This photo provided by the Chicago Zoological Society shows, Hudson, a four-year-old polar bear enjoying some holiday treats hidden in a 10-foot balsam fir tree a the Brookfield Zoo, Wednesday, Dec. 22, 2010 in Brookfield, Ill. Hudson's tree was adorned with fish, lettuce, peanut butter, apples, and meat.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, two chimpanzees share a piece of watermelon at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a meerkat plays with Christmas presents at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a meerkat plays with Christmas presents at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a meerkat plays with Christmas presents at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
SYDNEY, AUSTRALIA - DECEMBER 23: In this handout image provided by Taronga Zoo, a meerket rests inside a Christmas present at Taronga Zoo on December 23, 2010 in Sydney, Australia. The festive foods were given to the animals as part of the regular enrichment program in place to encourage the animals to forage for food and help improve hunting abilities.
Happy Holidays Everyone!