Animals at the Zoo (51 images)

Pictured in an undated file photo, Ahkiok, a 21-year-old Kodiak bear, was found dead in his den at the Indianapolis Zoo at 7am on June 11, 2008. The bear's cause of death is reported to be natural causes. Ahkiok was born at the Pittsburgh Zoo in 1987 and had been at the Indianapolis Zoo since 1988. The largest land carnivore, Kodiak males can be ten feet tall and weigh up to 1,800 pounds. Primarily solitary in the wild, Kodiak bears typically live up to 25 years. (UPI Photo/Indianapolis Zoo)

Five-month old Giant Panda Zhen Zhen (pronounced jun jun), which means Precious in Chinese, made her first public appearance December 22, 2007 at the San Diego Zoo. Zhen Zhen along with her mother, Bai Yun, spend most of their time outdoors eating and sleeping. (UPI Photo/Earl Cryer)

A female trumpeter swan swims with her newly hatched cygnet at Lincoln Park Zoo in Chicago on June 1, 2008. Trumpeter swans were hunted to near extinction by 1900 and now, thanks to managed breeding and recovery efforts, these swans are thriving again in many parts of the Midwest. (UPI Photo/Brian Kersey)

A female trumpeter swan wiggles its beak in the water as her newly hatched cygnet swims nearby at Lincoln Park Zoo in Chicago on June 1, 2008. Trumpeter swans were hunted to near extinction by 1900 and now, thanks to managed breeding and recovery efforts, these swans are thriving again in many parts of the Midwest. (UPI Photo/Brian Kersey)