What gives flamingos their famous pink — and is red really their original feather color? The striking hue is not innate: flamingo chicks are born with pale gray or white down, and the pink-to-red tones appear only after pigments from their food accumulate in feathers.Researchers attribute the color shift to carotenoid pigments in the birds’ diet. Algae, small crustaceans and other carotenoid-rich ...More