White-Headed Duck


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White-Headed Duck

 

(Oxyura leucocephala), a bird of the family Anatidae. The white-headed duck is approximately 55 cm long and weighs as much as 900 g. The plumage is brownish gray with dark speckling. The male has a blue bill and a white head with a black crown, and the female has a brown head with a gray bill. The white-headed duck is distributed sporadically in arid steppes and deserts from Spain and Morocco to the Tuva ASSR. The duck nests most often on brackish lakes on a mass of floating vegetation, often occupying the old nests of coots and other birds. A clutch contains six large eggs. It appears that the female broods the eggs only during the first half of the incubation period, and the embryos develop further without heating. The white-headed duck feeds on aquatic plants and small invertebrates. It has practically no commercial significance.

References in periodicals archive ?
bred prolifically, and became a threat to their native waterfowl, specifically their much-beloved white-headed duck.
Notably, these coastal wetlands are the most significant breeding, wintering and staging sites in Europe for four globally endangered birds: pygmy cormorant (Phalacrocorax pygmeus); Dalmatian pelican (Pelecanus crispus); white-headed duck (Oxyura leucocephala); and ferruginous duck (Aythya niroca) as well as the bittern (Botaurus stellaris).
Meanwhile, in 1980, park official Ken Mordue keeps a gentle grip on a newly-hatched white-headed duck, one of eight from a record-breaking clutch bred in captivity.
We acknowledge the conservation threat to the Spanish white-headed duck from hybridisation with the North American ruddy duck, but were not aware of the issue at Witton Lakes.
Some extinguished species like white-headed duck, houbara bustard and Siberian crane also travel on this route, he said.
Some extinguishing species like white-headed duck, houbara bustard and Siberian crane also travel on this route, he said.
But some species, such as the white-headed duck, have a lower survival rate than others, so extra assistance is needed to try to boost their chances of success.
It is threatening the survival of the white-headed duck here, a globally endangered bird.
In contrast, fewer genetic markers have been established in the duck and only a few articles have been published for some species including the Peking duck, eider duck, muscovy duck, mallard, white-headed duck, ruddy duck and musk duck (Maak et al.
Take this effort from Junior Environment Minister Jim Knight earlier this week, under pressure in the Commons from Tory MP Philip Hollobone on the cull of the American ruddy duck to help save the Spanish white-headed duck.
Some of these ducks are now said to be flying from Britain to Spain and mating with the endangered white-headed duck - the offspring being considered "impure" by conservationists and bird watchers.
Pat Thompson of the RSPB said: "The cull is not something which has universal support but we do believe it is the right course of action if we are to protect the white-headed duck.