Flamingos are a familiar sight even to those who have never seen one in real life. The tropical wading birds have long legs with backward-bending knees, long curvy necks, and most noticeably, they are pink. The color pink comes from beta-carotene in the crustaceans and plankton that flamingos eat. Zoo flamingos will turn white if their diet is not supplemented with live shrimp or flamingo chow containing carotenoid pigments. And the sweetest fact about flamingo is, The male and female of a mating pair build a nest together, and both sit on the egg while it incubates for about a month. Isn't it sweet?