swan

Swan is a huge waterbird that features a pocket under the beak. the new swans exist in all the continents except Antarctica. There are eight species of swans, all of which are waterfowl that eat fish, and they are known in all warm regions of the world. Uses of the big pelican's beak: It is considered as a food store for these birds. shovel the fish out of the water

Pelican species from the northern hemisphere have pure white plumage, but other species from the southern hemisphere have white and black plumage. The Australian black pelican is completely black in body except for the white flight feathers on its wings; Black pelican chicks have light gray plumage. The black-necked South American pelican has a white body and a black neck

The pelican is the largest of the extant birds in the watercress family, and is considered one of the largest flying birds. The main types are the mute swans, the trumpeting swans, and the squawking pelicans, each of which can reach 1.5 meters in length and weigh more than 15 kg. The distance between its wings may increase to more than 3.1 meters. Compared to nearby species of geese, pelicans are larger and have proportionally larger feet and necks. Adult birds have a patch of skin free of feathers between the eyes and beak. The shape of the feathers is similar in both sexes, but the males are larger and heavier than the females

The legs of swans are usually grayish-black, except for two South American species, which have pinkish legs. The colors of the beaks of swans vary: the four species of subarctic have black beaks with some yellow areas, while the other species of pelicans have red and black beaks. Although they do not have teeth, pelicans have small jagged edges on their beak that resemble teeth. Pelicans use them to pick up and eat aquatic plants and algae, and they also use them to eat mollusks, small fish, frogs and worms. Mute pelicans and black-necked pelicans have submandibular pouches at the base of the beak

Pelicans feed in water and on land. Pelicans are considered herbivores, although they may feed on small amounts of aquatic animals. In the water, pelicans obtain their food by lifting or dredging, and their diet consists of roots, tubers, stems, and leaves of aquatic and submerged plants