A lioness looks at a 'Christmas gift' during a photocall marking Christmas at the London Zoo in central London on December 12, 2012. CARL COURT/AFP/Getty Images
Lion cubs Heidi and Indi investigate a Christmas present given to them, during a media opportunity at London Zoo, Wednesday, Dec. 12, 2012. The animals at ZSL London Zoo are set to enjoy a wild Christmas this year, with some very merry treats. Lion cubs Heidi and Indi have definitely made it on to Santa’s ‘good’ list and will be getting their paws on some presents, whilst the penguins will be treated to festive fishy gifts under the tree. (AP Photo/Kirsty Wigglesworth)
Squirrel monkeys investigate a Christmas stocking given to them, during a media opportunity at London Zoo, Wednesday, Dec. 12, 2012. The animals at ZSL London Zoo are set to enjoy a wild Christmas this year, with some very merry treats. Lion cubs Heidi and Indi have definitely made it on to Santa’s ‘good’ list and will be getting their paws on some presents, whilst the penguins will be treated to festive fishy gifts under the tree. (AP Photo/Kirsty Wigglesworth)
Squirrel monkeys investigate a Christmas stocking given to them, during a media opportunity at London Zoo, Wednesday, Dec. 12, 2012. The animals at ZSL London Zoo are set to enjoy a wild Christmas this year, with some very merry treats. Lion cubs Heidi and Indi have definitely made it on to Santa’s ‘good’ list and will be getting their paws on some presents, whilst the penguins will be treated to festive fishy gifts under the tree. (AP Photo/Kirsty Wigglesworth)
SYDNEY, AUSTRALIA - DECEMBER 14: A Sun Bear receives a Christmas treat at Taronga Zoo on December 14, 2012 in Sydney, Australia. Taronga Zoo celebrated Christmas early giving Christmas-themed environmental activities to the zoo's Giraffes, Sun Bears, Meerkats, Aldabra Tortoise and Cockatoos providing a wonderful natural display for zoo visitors. (Photo by Lisa Maree Williams/Getty Images)
SYDNEY, AUSTRALIA - DECEMBER 14: A Sun Bear receives a Christmas treat at Taronga Zoo on December 14, 2012 in Sydney, Australia. Taronga Zoo celebrated Christmas early giving Christmas-themed environmental activities to the zoo's Giraffes, Sun Bears, Meerkats, Aldabra Tortoise and Cockatoos providing a wonderful natural display for zoo visitors. (Photo by Lisa Maree Williams/Getty Images)
SYDNEY, AUSTRALIA - DECEMBER 14: Giraffes receive a Christmas treat at Taronga Zoo on December 14, 2012 in Sydney, Australia. Taronga Zoo celebrated Christmas early giving Christmas-themed environmental activities to the zoo's Giraffes, Sun Bears, Meerkats, Aldabra Tortoise and Cockatoos providing a wonderful natural display for zoo visitors. (Photo by Lisa Maree Williams/Getty Images)
SYDNEY, AUSTRALIA - DECEMBER 14: A giraffe receives a Christmas treat at Taronga Zoo on December 14, 2012 in Sydney, Australia. Taronga Zoo celebrated Christmas early giving Christmas-themed environmental activities to the zoo's Giraffes, Sun Bears, Meerkats, Aldabra Tortoise and Cockatoos providing a wonderful natural display for zoo visitors. (Photo by Lisa Maree Williams/Getty Images)
An European grey wolf is pictured in the animal park of Sainte-Croix, on December 12, 2012, in Rhodes, eastern France. JEAN-CHRISTOPHE VERHAEGEN/AFP/Getty Images
An European grey wolf is pictured in the animal park of Sainte-Croix, on December 12, 2012, in Rhodes, eastern France. JEAN-CHRISTOPHE VERHAEGEN/AFP/Getty Images
A lion holds a 'Christmas gift' during a photocall marking Christmas at the London Zoo in central London on December 12, 2012. CARL COURT/AFP/Getty Images
SYDNEY, AUSTRALIA - DECEMBER 14: A Meerkat receives a Christmas treat at Taronga Zoo on December 14, 2012 in Sydney, Australia. Taronga Zoo celebrated Christmas early giving Christmas-themed environmental activities to the zoo's Giraffes, Sun Bears, Meerkats, Aldabra Tortoise and Cockatoos providing a wonderful natural display for zoo visitors. (Photo by Lisa Maree Williams/Getty Images)
A Meerkat plays with a Christmas decoration at Taronga Zoo in Sydney on December 14, 2012. In the lead up to Christmas a selection of the zoo animals were challenged with Christmas-themed environmental enrichment activities. GREG WOOD/AFP/Getty Images
BERLIN, GERMANY - DECEMBER 12: A dwarf swan meanders by as zookeeper Yancy Rentz (L) and biologist Benjamin Ibler count ducks in a bird enclosure during the annual animal inventory at Zoo Berlin zoo on December 12, 2012 in Berlin, Germany. The zoo conducts the once-a-year inventory over a period of several months, depending on the species, to assess such factors as the state of animal colonies, the presence of foreign species and the true number of species and their members. (Photo by Sean Gallup/Getty Images)
BERLIN, GERMANY - DECEMBER 12: Zookeeper Thomas Warkentin strokes the head of a live rhinoceros iguana after measuring the lizard during the annual animal inventory at Zoo Berlin zoo on December 12, 2012 in Berlin, Germany. The zoo conducts the once-a-year inventory over a period of several months, depending on the species, to assess such factors as the state of animal colonies, the presence of foreign species and the true number of species and their members. (Photo by Sean Gallup/Getty Images)
SYDNEY, AUSTRALIA - DECEMBER 14: A Aldabra Tortoise receives a Christmas treat at Taronga Zoo on December 14, 2012 in Sydney, Australia. Taronga Zoo celebrated Christmas early giving Christmas-themed environmental activities to the zoo's Giraffes, Sun Bears, Meerkats, Aldabra Tortoise and Cockatoos providing a wonderful natural display for zoo visitors. (Photo by Lisa Maree Williams/Getty Images)
Penguins look for fish placed around a Christmas tree during a media opportunity at London Zoo, Wednesday, Dec. 12, 2012. The animals at ZSL London Zoo are set to enjoy a wild Christmas this year, with some very merry treats. Lion cubs Heidi and Indi have definitely made it on to Santa’s ‘good’ list and will be getting their paws on some presents, whilst the penguins will be treated to festive fishy gifts under the tree. (AP Photo/Kirsty Wigglesworth)
BERLIN, GERMANY - DECEMBER 12: Zookeeper Thomas Warkentin holds a woma python from Australia during the annual animal inventory at Zoo Berlin zoo on December 12, 2012 in Berlin, Germany. The zoo conducts the once-a-year inventory over a period of several months, depending on the species, to assess such factors as the state of animal colonies, the presence of foreign species and the true number of species and their members. (Photo by Sean Gallup/Getty Images)
A female sea lion climbs out of a pool on heated steps on Tuesday, Dec. 11, 2012, at the Alaska SeaLife Center in Seward, Alaska. The center is using a heat pump system to extract energy from seawater to partially heat its facilities, including outdoor concrete areas used by animals and people. (AP Photo/Dan Joling)
BERLIN, GERMANY - DECEMBER 12: A giant grasshopper rests on the hand of a zookeeper during the annual animal inventory at Zoo Berlin zoo on December 12, 2012 in Berlin, Germany. The zoo conducts the once-a-year inventory over a period of several months, depending on the species, to assess such factors as the state of animal colonies, the presence of foreign species and the true number of species and their members. (Photo by Sean Gallup/Getty Images)
CP | By The Canadian Press Posted: 02/14/2013 6:57 pm EST | Updated: 02/14/2013 8:25 pm EST