The swans are the largest members of the waterfowl family Anatidae, and are among the largest flying birds. The largest species, including the mute swan, trumpeter swan, and whooper swan, can reach length of over 60 inches & weigh over 33 pounds. Their wingspans can be almost 10 ft. Compared to the closely related geese, they are much larger in size: feet and necks. They also have a patch of unfeathered skin between the eyes and bill in adults.