The pink and black curved beak characteristic of the greater flamingo (Phoenicopterus roseus) is the prerogative of adulthood and an essential tool for filtering its food. The flamingo, born entirely covered with a white-gray down and a tiny and straight beak, acquires it as it grows. It is nourished by regurgitation of a liquid rich in glucose, albumin, and lipids secreted by its parents' digestive glands until the age of one month, the moment it begins to find its sustenance on its own. Able to fly around 70 days old, it then leaves the assemblies of flamingos of its age gathered in nurseries.