The adults are completely white, but the head can be stained rusty from feeding in acidic waters. The bill is orange-red with black nail, cutting edge, bill-base, nostril, and fleshly frontal knob. Legs and feet black, but remain pink on 'Polish' birds. The Juvenile: bill lacks frontal knob, pinkish-grey, with black areas as adult becoming pinker during first winter and attaining adult shape and colour by second winter. Legs and feet grey or pinkish-grey on the Polish swan. Field Identification: Length 125-155 cm (50-61in). The males are usually larger than females. In Flight: The typical swan shape, most easily distinguished in flight by clearly audible throbbing drone 'waou, waou waou' produced by the wing-beats. Hardly vocal in flight, apart from occasional grunts. Pointed tail projects beyond prominent black feet, in northern species feet reach tail-tip, but if a bird is close enough to see this feature bill is also visible. Voice: as the name implies, least vocal of swans, but by no means mute. Utters short grunts and hisses, also during breeding period short, loud snorts, but lacks honking flight calls of other species. Habits: We find this swan on most of our lakes, rivers and ponds, both in open country and about towns and cities. They are generally tame, but wild birds (in Asia) are wary and unapproachable. It has long been domesticated particularly in Britain, where its history dates back to the twelfth century; also domesticated by the Greeks and Romans <b>...</b>