Animals at the Zoo (51 images)

Updated: March 21, 2008 at 6:46 PM
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The San Diego Zoo's giant panda cub, Su Lin, celebrates her first birthday by playing with special birthday treats including icicles, spelling her name and birthday cakes made by Zoo staff on August 2, 2006. Su Lin is the third giant panda born at the San Diego Zoo. Giant pandas are critically endangered. There are an estimated 1,600 pandas left in the world. (UPI Photo/Ken Bohn/San Diego Zoo)
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