The black-necked swan is a species of waterfowl in the tribe Cygnini of the subfamily Anserinae. It is found in Argentina, Brazil, Chile, Uruguay, and the Falkland Islands.
Region
Southern South America
Typical Environment
Occurs from central Chile and Argentina south through Patagonia and Tierra del Fuego, with populations in Uruguay, southern Brazil, and the Falkland Islands. It frequents shallow freshwater lakes, lagoons, and marshes, and also uses brackish estuaries and sheltered coastal inlets. During non-breeding periods it may gather in large flocks on expansive lagoons and bays. Local movements are common, tracking suitable water levels and food-rich wetlands.
Altitude Range
Sea level to 1200 m
Climate Zone
Temperate
Ease of Keeping
Beginner friendly: 2/5
The black-necked swan is the only swan native to South America, easily recognized by its stark black neck and bright red bill knob. Pairs are strongly monogamous and often carry their downy cygnets on their backs while swimming. They prefer calm, shallow waters rich in submerged vegetation and will move locally in response to water levels and food availability.
Temperament
generally calm but territorial in breeding season
Flight Pattern
strong flier with steady, powerful wingbeats
Social Behavior
Highly social outside the breeding season, forming sizable flocks on large wetlands. Strongly monogamous pairs build bulky nests of reeds on islands or floating vegetation. Both parents tend the young, which often ride on the adults’ backs for warmth and protection.
Migratory Pattern
Partial migrant
Song Description
Typically quiet for a swan, giving soft whistles and gentle honks during contact. When threatened it may hiss or emit harsher notes.
