Mute Swan

The Mute Swan is one of the world's largest waterfowl, entirely white as an adult with a distinctively curved, S-shaped neck often held with the bill angled downward. The orange-red bill bears a prominent black basal knob, larger and more developed in males, and black facial skin extends from the base of the bill to the eye.

Despite its name, the Mute Swan is not silent; it simply lacks the loud trumpeting or whooping calls of other swan species, communicating instead with softer grunts, hisses, and a distinctive throbbing wingbeat audible in flight.

Key field marks

• All-white adult plumage
• Orange-red bill with a black knob at the base, larger in males
• Neck habitually held in a graceful S-curve, bill often pointed down
• Wings sometimes raised in an arched "busking" display when threatened

Similar species

• Trumpeter Swan and Tundra Swan: both have all-black bills without an orange base or knob, and hold their necks straighter
• Whooper Swan: has a yellow-and-black bill and a straighter neck posture

The orange knobbed bill and curved neck posture make the Mute Swan easy to separate from all other swan species.

Range and habitat

Native to temperate Europe and Asia, the Mute Swan has also been widely introduced to North America, Australia, New Zealand, and southern Africa, where it now breeds on lakes, ponds, slow rivers, and coastal lagoons, frequently in urban parks and estates.

Migration

Most populations are largely resident or make only short-distance movements to avoid freezing water, though northern and eastern European populations undertake longer migrations to ice-free wintering areas.

Behavior

Mute Swans are strongly territorial during the breeding season, with pairs vigorously defending nesting areas against other swans, waterfowl, and even people, often performing an aggressive wing-arching "busking" display while swimming toward an intruder.

Voice

Vocalizations include grunts, hisses, and snorts rather than loud calls; in flight, the wings produce a distinctive rhythmic throbbing or humming sound audible from a distance.

Feeding

They feed mainly by upending or dabbling to reach submerged aquatic plants, and also graze on waterside grasses and occasionally take small invertebrates.

Nesting and breeding

Pairs, which mate for life, build a large mounded nest of reeds and vegetation at the water's edge; the female incubates five to eight eggs while the male guards nearby, and both parents fiercely protect the cygnets after hatching.