The greater flamingo (Phœnicopterus roseus) most often feeds standing up without worrying about the light nor the availability of its preys, since it mainly absorbs small invertebrates (crustaceans, mollusks, insects, annelid worms) present in the mud and probably also a few small fish. The rest of its diet consists of seeds and other fragments of plant origin. A limivorous (mud eater) species, the flamingo rejects most of the mud but nevertheless swallows a small part of it which constitutes a mineral and organic mixture rich in microscopic algae, bacteria, diatoms, and protozoa.