Male - The male Blue-billed Duck has a deep chestnut body, a black head and neck, a blue beak, brown eyes, white abdomen, grey-black tail, and the legs and feet are grey.
Female - The female has a brown barred body, dark-brown head which is paler on the throat and neck, and dark-brown beak.
Eclipse - The male in eclipse plumage is similar to the female but has a darker head and neck and the flanks are pale brown or chestnut.
Size: - Typical Adult is 35-41cm (14-16in).
Food: - Aquatic plants, seeds, aquatic insects, larvae, crustaceans and molluscs.
Habitat/Range: - Freshwater swamps, marshes, and large rivers in Western and south-eastern Australia, and Tasmania.
Breeding Season: - September to November in Western Australia and October to March in south-eastern Australia.
Eggs: - 5 to 6 (pale green or whitish colour).
Notes: - The Blue-billed Duck is an Australian Stiff-tail duck. The tail is usually held flat in the water but will be held erect during courtship displays or when it is being defensive.
Conservation status (IUCN 3.1):
Classification: - Family: Anatidae,
Subfamily: Oxyurinae, Genus: Oxyura.