Search results
Results from the WOW.Com Content Network
Complete hybridisation of various species of wild duck gene pools could result in the extinction of many indigenous waterfowl. [120] The mallard itself is the ancestor of most domestic ducks, and its naturally evolved wild gene pool gets genetically polluted in turn by the domestic and feral populations. [121]
Grandry corpuscles are found in the superficial portion of the dermis in bill skin and oral mucosa of aquatic bird species. [2] [7] The specific location in the dermis varies between and within species; Grandry corpuscles have been observed at depths below the epidermis of 20-150 μm in domestic geese, 1-80 μm in greater white-fronted geese, [8] and 50-100 μm in mallards. [1]
Duck is the common name for numerous species of waterfowl in the family Anatidae. Ducks are generally smaller and shorter-necked than swans and geese , which are members of the same family. Divided among several subfamilies, they are a form taxon ; they do not represent a monophyletic group (the group of all descendants of a single common ...
Possible backcross between a Mallard and American black duck. All the species within the mallard complex are known to hybridize with other members within overlapping ranges. Mallards, both domestic and wild in particular are notorious hybridizers, know to frequently hybridize within the mallard complex and even outside of Anas.
This is a list of the breeds of domestic duck which have official recognition at national or international level. [1]Most breeds of duck derive from the wild mallard, Anas platyrhynchos, while a small minority are descendants of the Muscovy duck, Cairina moschata.
American Pekin flock. The Pekin or White Pekin is an American breed of domestic duck, raised primarily for meat. [6] [7] It derives from birds brought to the United States from China in the nineteenth century, [8] and is now bred in many parts of the world. [6]
The species also occurs widely, but in limited numbers, in Colorado in all seasons and there are photographs of birds referable to this taxon from Utah, Wyoming, Nebraska, and Montana. [ 3 ] It is a bird of most wetlands , including ponds and rivers, and usually feeds by dabbling for plant food or grazing.
The mottled duck (Anas fulvigula) [note 1] or mottled mallard is a medium-sized species of dabbling duck. It is intermediate in appearance between the female mallard and the American black duck . It is closely related to those species , and is sometimes erroneously considered a subspecies of the former.