Male - The male Lake Duck in breeding season has a deep chestnut body, a black head and neck, a blue beak, brown eyes, whitish abdomen, grey tail, dark-brown wings, and the legs and feet are dark grey. During non-breeding season the male looks similar to the female but with some reddish feathers on the body.
Female - The female has a dark-brown head with a whitish lower head and foreneck, a whitish stripe under the eye, dark-grey beak, and brown body.
Size: - Typical Adult is 36-46cm (14-18in).
Food: - Aquatic plants, seeds, aquatic insects, larvae, crustaceans and molluscs.
Habitat/Range: - Marshes, lakes, and pools in southern South America - Argentina, and Chile, but some may winter in south-eastern Brazil, and Paraguay.
Breeding Season: - Begins in October.
Eggs: - 3 to 5 (Whitish colour).
Notes: - The Lake Duck is also sometimes called the Argentine Ruddy Duck, Argentine Blue-billed Duck, or Argentine Blue-bill and is a South American stiff-tail duck.
Conservation status (IUCN 3.1):
Classification: - Family: Anatidae,
Subfamily: Oxyurinae, Genus: Oxyura.