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APTOPIX Philadelphia Weather
A Caribbean flamingo puts its beak under its wing in the spring-like weather at the Philadelphia Zoo Thursday, Feb. 23, 2012 in Philadelphia. The Philadelphia Zoo is one of America's oldest, opening to the public in 1874. Flamingo's pink color comes from the carotenoids in their food. Without these, the flamingo's feathers would be white. At the zoo, they eat scientifically formulated commercial flamingo feed that keeps their feathers pink. (AP Photo/Alex Brandon)