The demography of the greater flamingos as well as their movements and needs are studied to protect their Camargue colonies more effectively. Young flamingos, not yet able to fly, are captured every year to be ringed, measured, and weighed before being released. A first colored plastic ring bearing an alphanumeric code allows determining the age of the bird through binoculars. A second aluminum one, placed on the other leg, accompanies it until its disappearance. These ringing operations have made it possible to demonstrate that more than 50% of the French population of greater flamingos is sedentary, while the rest migrates around the Mediterranean and to West Africa.