These cute, fluffy cygnets swimming in the East Harbor of Kristiansand hardly have the appearance of an adult mute swan. Once they reach maturity, this migratory waterfowl will have white plumage, an elegant S-shaped neck and an orange bill accented by a black knob at the base. Although they are flightless at this age, they will eventually have a wingspan of 80 to 90 inches and weigh about 25 pounds. There are about a half million mute swans in the world. They tend to favor the temperate areas of Europe so there is only a small population in Norway.