Head to head
Lake Duck vs Black-headed Duck
Lake Duck
VS Black-headed Duck
Both are ducks of South American freshwater wetlands known for an unusual biological trait rather than striking plumage alone.
| Lake Duck | Black-headed Duck | |
|---|---|---|
| Scientific name | Oxyura vittata | Heteronetta atricapilla |
| Conservation status | Least Concern | Least Concern |
| Defining trait | Extremely long reproductive organ relative to body size | Only obligate brood-parasite duck species |
| Parental care | Raises its own young | None, relies entirely on host species |
| Breeding male coloring | Chestnut body, sky-blue bill | Glossy black head, mottled brown body |
| Swimming style | Diving, stiff-tailed propulsion | Diving and dabbling |
| Nest behaviour | Builds a concealed nest in marsh vegetation | Builds no nest of its own |
| Diet | Aquatic invertebrates, seeds, plant matter | Aquatic invertebrates and plant matter |
Lake Duck vs Black-headed Duck: common questions
Which duck has the more unusual reproductive biology?
Both are unusual in different ways, the lake duck for a male anatomical record unmatched among birds, and the black-headed duck for being the only duck species known to rely entirely on laying eggs in other birds' nests.
Does the lake duck build a nest?
Yes, unlike the black-headed duck, which builds no nest of its own and relies entirely on host species, the lake duck constructs a concealed nest hidden in dense marsh vegetation.
Which duck has more colourful breeding males?
The lake duck does, with breeding males showing a rich chestnut body and bright sky-blue bill, a more striking combination than the black-headed duck's glossy black head and mottled brown body.