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The North American Waterfowl Management Plan for redheads is 760,000 North American birds. [13] The population size has increased in the past few decades to well over 1.4 million birds. [6] Redheads make up 2% of North America's duck population and only 1% of its harvested ducks. [13]
First the male chases the female. Then, the female moves to the display platform and squats with her head under the water. The male then mounts the female, using his claws and wings to balance on the female's back while she brings her head above the water. Sexual intercourse usually takes no longer than two seconds. [28]
Diving ducks can swim underwater to forage. These ducks expend more than 90% of their energy to overcome their own buoyancy when they dive. [28] They can also achieve higher speeds underwater due to surface speeds being limited to their hull speed; at this speed, the wave drag increases to the point where the duck cannot swim faster. [29]
Geese and ducks are just two types of water birds, which include seabirds, shorebirds, waterfowl, and numerous other forms of birds. Video of gulls, ducks, and swans feeding on the Danube River in Vienna (2014) A water bird, alternatively waterbird or aquatic bird, is a bird that lives on or around water.
The common merganser (North American) or goosander (Eurasian) (Mergus merganser) is a large sea duck of rivers and lakes in forested areas of Europe, Asia, and North America. The common merganser eats mainly fish. It nests in holes in trees.
Pteronetta, Hartlaub's duck – traditionally dabbling ducks, but may be closer to Cyanochen; Cairina and Asarcornis, Muscovy duck and white-winged duck, respectively (2 species) – traditionally dabbling ducks, but may be paraphyletic, with one species in Tadorninae and the other closer to diving ducks
The northern shoveler (/ ˈ ʃ ʌ v əl ər /; Spatula clypeata), known simply in Britain as the shoveler, [2] is a common and widespread duck.It breeds in northern areas of Europe and across the Palearctic and across most of North America, [3] wintering in southern Europe, the Indian subcontinent, Southeast Asia, Central America, the Caribbean, and northern South America.
The surf scoter (Melanitta perspicillata) is a large sea duck native to North America.Adult males are almost entirely black with characteristic white patches on the forehead and the nape and adult females are slightly smaller and browner.
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