Which bird is born white but turns pink by eating algae?

The bird that is born white and turns pink by eating algae is the flamingo. Specifically, their diet consists of carotenoid-rich foods, including certain types of algae and crustaceans, which contribute to their pink coloration. The pigments in these foods are broken down and deposited in the feathers, skin, and beak of the flamingo, leading to their characteristic vibrant hue as they mature.