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The ferruginous duck (Aythya nyroca), also known as ferruginous pochard, common white-eye or white-eyed pochard, is a medium-sized diving duck from Eurosiberia.The scientific name is derived from the Ancient Greek word, αἴθυιᾰ (aithuia), an unknown seabird mentioned by authors including Hesychius and Aristotle, and the Russian word, нырок (nyrok), [2] the Russian word for pochard ...
The white-faced whistling duck (Dendrocygna viduata) is a whistling duck that breeds in sub-Saharan Africa and much of South America. This species is gregarious, and at favoured sites, the flocks of a thousand or more birds arriving at dawn are an impressive sight. As the name implies, these are noisy birds with a clear three-note whistling call.
In summer, the male is dark on the head, neck and back with a white cheek patch. The female has a brown back and a relatively short pointed tail. In winter, the female's head and neck are white with a dark crown. In summer, the head is dark. Juveniles resemble adult females in autumn plumage, though with a lighter, less distinct cheek patch.
The face and upper neck are gray, and they sport a thin but distinct white eye-ring. The extensive white in the wings is obvious in flight, less so on the ground; it is formed by the secondary remiges while the primaries are black; the wing coverts are brown. Males and females look alike; juveniles are similar but have a gray bill and less ...
The bird is predominantly black, with large white patches on the wing; the back feathers being iridescent and glossy in males, while the females are more drab. Although the Muscovy duck is a tropical bird, it adapts well to cooler climates, thriving in weather as cold as −12 °C (10 °F) and able to survive even colder conditions.
The causes vary, but are often rooted in excess oil and bacteria on the face, chest, or back, which can be triggered by hormonal issues, stress, certain foods, and irritating products.
Plumed whistling duck Dendrocygna eytoni (Eyton, 1838) Australia. Size: Measuring 42–60 cm (16.5–23.5 in) and weighing around one kilogram (2.2 lb) Habitat: Diet: LC [19] Spotted whistling duck Dendrocygna guttata (Schlegel, 1866) Indonesia, New Guinea, Australia and the Philippines Size: 43–50 cm tall. Males can weigh anywhere from 590g ...
The white-backed duck (Thalassornis leuconotus) is a waterbird of the family Anatidae. It is distinct from all other ducks, but most closely related to the whistling ducks in the subfamily Dendrocygninae, though also showing some similarities to the stiff-tailed ducks in the subfamily Oxyurinae. It is the only member of the genus Thalassornis.