At the zoo

A polar bear cub eats a fish as he just woke up after winter sleeping at a zoo. Some of Canada's polar bear populations risk being wiped out within four decades because of climate change and human activity including hunting, the World Wide Fund For Nature warned Sunday.

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Cute Cub!!!!

An Amur tiger cub plays with its mother Kira's, tail at the Philadelphia Zoo in Philadelphia, Thursday, Aug. 16, 2007. Three Amur tiger cubs, born May 24, 2007, made their public debut Thursday at the Zoo. (AP Photo/Matt Rourke)

At the zoo

A White tiger in New Delhi zoo. India may have just 1,300 to 1,500 tigers left -- less than half of the number believed to exist five years ago.

At the zoo

A worker sprays an elephant to cool it down at a zoo in Hangzhou, east China's Zhejiang province, July 23, 2007. The local temperature hit 37 degrees Celsius (98.6 degrees Fahrenheit) on July 23, according to local media. Picture taken July 23, 2007. REUTERS/China Daily (CHINA) CHINA OUT