Тынық мұхит қара үйрек (Тынық мұхит қара үйрегі)

Species of bird

The Pacific black duck (Anas superciliosa) is a dabbling duck found in much of Indonesia, New Guinea, Australia, New Zealand, and many islands in the southwestern Pacific, reaching to the Caroline Islands in the north and French Polynesia in the east. It is usually called the grey duck in New Zealand, where it is also known by its Maori name, pārera.

The nest is usually placed in a hole in a tree, but sometimes an old nest of a corvid is used and occasionally the nest will be placed on the ground. The clutch of 8–10 pale cream eggs is incubated only by the female. The eggs hatch after 26–32 days. The precocial downy ducklings leave the nest site when dry and are cared for by the female. They can fly when around 58 days of age.

The Pacific black duck is mainly vegetarian, feeding on seeds of aquatic plants. This diet is supplemented with small crustaceans, molluscs and aquatic insects. Food is obtained by 'dabbling', where the bird plunges its head and neck underwater and upends, raising its rear end vertically out of the water. Occasionally, food is sought on land in damp grassy areas. This same impact is occurring in many areas of Australia, Tasmania and Adelaide in particular. It was assumed that far more mallard drakes mate with grey duck females than vice versa based on the fact that most hybrids show a mallard type plumage, but this is not correct; it appears that the mallard phenotype is dominant, and that the degree to which species contributed to a hybrid's ancestry cannot be determined from the plumage.