Head to head
Black-necked Swan vs Silvery Grebe
Black-necked Swan
VS Silvery Grebe
Both waterbirds share the wetlands of southern South America, but they differ enormously in size and social behaviour.
| Black-necked Swan | Silvery Grebe | |
|---|---|---|
| Scientific name | Cygnus melancoryphus | Podiceps occipitalis |
| Size | A large waterfowl species | A small diving waterbird |
| Plumage | A white body with a black head and neck | Pale silvery-grey overall |
| Nesting behaviour | Not documented as colonial | Breeds in dense, sociable colonies |
| Conservation status | Least Concern | Least Concern |
| Population trend | Stable | Stable |
| Flight | Flightless for several weeks during its annual moult | Not documented as similarly limited |
| Habitat | Wetlands, coastal | Wetlands, coastal |
Black-necked Swan vs Silvery Grebe: common questions
Which one is much larger?
The black-necked swan is far larger, one of the bigger waterfowl species, compared with the much smaller silvery grebe.
Which one breeds in dense colonies?
The silvery grebe breeds this way, nesting in dense, sociable colonies unusual among grebes, unlike the black-necked swan, which is not documented nesting colonially.
Which one becomes flightless during its annual moult?
The black-necked swan does this, shedding all its flight feathers at once each year like other swans, a vulnerability not specifically documented for the silvery grebe.