How do flamingos get their pink colour?

Flamingos get their pink colour from the carotenoid pigments in their diet, primarily found in algae, shrimp, and other crustaceans. These pigments are broken down in their liver and deposited in their feathers, skin, and beaks. Flamingos in captivity may appear paler if their diet lacks carotenoids. The intensity of their colour can indicate their health and diet quality, playing a role in attracting mates.