The Lake Duck (Oxyura vittata) is a small, South American stiff-tailed duck. It is also called the Argentine blue-bill, Argentine lake duck, or Argentine ruddy duck.
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 fore-neck, a whitish stripe under the eye, dark-grey beak, and brown body.
Size: – Typical Adult is 14-18 inches.
Food: – Aquatic plants, seeds, aquatic insects, larvae, crustaceans and molluscs.
Habitat: – 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 color).
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.
The different types of wild ducks can be grouped into puddle, aka “dabbling” and diving ducks. The dabblers mostly feed in smaller bodies of shallow water or along shorelines, where they are able to tip their bodies forward to reach their food on the bottom. There are divers who feed in deeper water where they dive and pursue their quarry. Some of these birds, the Harlequin Duck for example, actually dives to the bottom of fast-flowing waters and feeds on life forms attached to rocks.