Mia Shangaris, age 7, poses for photographers next to a Rockhopper penguin during a photo-call to mark the opening of the new London Zoo penguin pool and beach, in London May 26, 2011. [Photo/Agencies]

A zoo keeper holds a 4-week-old Humboldt penguin during a photo-call to mark the opening of the new London Zoo penguin pool and beach, in London May 26, 2011. [Photo/Agencies]