|
Oxyurini
The Oxyurini are a tribe of the duck subfamily of birds, the Anatinae. It has been subject of considerable debate about its validity and circumscription. Some taxonomic authorities place the group in its own subfamily, the ''Oxyurinae''. Most of its members have long, stiff tail feathers which are erected when the bird is at rest, and relatively large, swollen bills. Though their relationships are still enigmatic, they appear to be closer to swans and true geese than to the typical ducks. The highest diversity is found in the warmer parts of the Americas, but at least one species occurs in a major part of the world. Their Morphology (biology), habitus resembles a freshwater diving duck, particularly when moving on dry land. Their legs are set far back, making them awkward walkers, so they rarely leave the water. When at rest, their tails are a notable difference, and in the water they often swim very deep-set. Their unusual courtship displays involve drumming noises from inflatabl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatidae
The Anatidae are the biological family (biology), family of water birds that includes ducks, goose, geese, and swans. The family has a cosmopolitan distribution, occurring on all the world's continents except Antarctica. These birds are adapted for aquatic locomotion, swimming, floating on the water surface, and, in some cases, diving in at least shallow water. The family contains around 174 species in 43 genus, genera (the magpie goose is no longer considered to be part of the Anatidae and is now placed in its own family, Anseranatidae). They are generally herbivorous and are monogamy in animals, monogamous breeders. A number of species undertake bird migration, annual migrations. A few species have been domesticated for agriculture, and many others are hunted for food and recreation. Five species have become extinct since 1600, and many more are threatened with extinction. Description and ecology The ducks, geese, and swans are small- to large-sized birds with a broad and elo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Masked Duck
The masked duck (''Nomonyx dominicus'') is a tiny stiff-tailed duck ranging through the tropical Americas. Taxonomy The only member of the genus ''Nomonyx'', it is intermediate between the rather primitive black-headed duck (''Heteronetta'') and the very apomorphic true stiff-tailed ducks. It is sometimes included with the latter in the genus '' Oxyura'', but the masked ducks are now considered the descendants of a missing link in the Oxyurini evolution, having changed little for millions of years. Distribution and habitat They are found from southern Texas and Mexico to South America and also in the Caribbean. Primarily not migratory, masked ducks are reported as very uncommon vagrants in the southernmost United States, along the Mexican border and in Florida. As of 2000, the conservation status for masked ducks in Texas is 3,800 birds. On April 1, 1962, it was recorded from Lowndes County, Georgia, where it was photographed by Alexander Wetmore. Masked ducks breed in any fre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black-headed Duck
The black-headed duck (''Heteronetta atricapilla'') is a South American duck in subfamily Oxyurinae of family Anatidae.HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip retrieved August 7, 2022 It is found in Argentina, Bolivia, Brazil, Chile, Paraguay, and Uruguay.Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022 Taxonomy and systematics The black-headed duck is the only member of genus ''Heteronetta'' and has no subspecies. It is closely related to the "stiff-tailed" ducks of genera '' Nomonyx'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Masked Duck
The masked duck (''Nomonyx dominicus'') is a tiny stiff-tailed duck ranging through the tropical Americas. Taxonomy The only member of the genus ''Nomonyx'', it is intermediate between the rather primitive black-headed duck (''Heteronetta'') and the very apomorphic true stiff-tailed ducks. It is sometimes included with the latter in the genus '' Oxyura'', but the masked ducks are now considered the descendants of a missing link in the Oxyurini evolution, having changed little for millions of years. Distribution and habitat They are found from southern Texas and Mexico to South America and also in the Caribbean. Primarily not migratory, masked ducks are reported as very uncommon vagrants in the southernmost United States, along the Mexican border and in Florida. As of 2000, the conservation status for masked ducks in Texas is 3,800 birds. On April 1, 1962, it was recorded from Lowndes County, Georgia, where it was photographed by Alexander Wetmore. Masked ducks breed in any fre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruddy Duck
The ruddy duck (''Oxyura jamaicensis'') is a species of duck in the family Anatidae. The ruddy duck is one of six species within the stiff-tailed ducks (genus ''Oxyura''). Stiff-tailed ducks occupy heavily vegetated habitats in North and South America as well as the British Isles, France, and Spain. In the 1940s, the ruddy duck was introduced to the United Kingdom, where it has since established a growing population. Outside the Americas, the ruddy duck is considered a highly invasive species, prompting many countries to initiate culling projects to eradicate it from the native ecosystem. The generic name is derived from Ancient Greek ''oxus'' meaning "sharp", and ''oura'' meaning "tail". The specific name ''jamaicensis'' means "from Jamaica". The ruddy duck has also been nicknamed "butterball", a term used to describe an individual that is somewhat fat, due to its short and stout stature making activities like flying and walking upright awkward. Taxonomy The ruddy duck ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anatinae
The Anatinae are a subfamily of the family Anatidae (swans, geese and ducks). Its surviving members are the dabbling ducks, which feed mainly at the surface rather than by diving. The other members of the Anatinae are the extinct moa-nalo, a young but highly apomorphic lineage derived from the dabbling ducks. There has been much debate about the systematical status and which ducks belong to the Anatinae. Some taxonomic authorities only include the dabbling ducks and their close relatives, the extinct moa-nalos. Alternatively, the Anatinae are considered to include most " ducks", and the dabbling ducks form a tribe Anatini within these. The classification as presented here more appropriately reflects the remaining uncertainty about the interrelationships of the major lineages of Anatidae (waterfowl). Systematics The dabbling duck group, of worldwide distribution, was delimited in a 1986 study to include eight genera and some 50–60 living species. However, Salvadori's te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Black-headed Duck
The black-headed duck (''Heteronetta atricapilla'') is a South American duck in subfamily Oxyurinae of family Anatidae.HBW and BirdLife International (2021) Handbook of the Birds of the World and BirdLife International digital checklist of the birds of the world. Version 6. Available at: http://datazone.birdlife.org/userfiles/file/Species/Taxonomy/HBW-BirdLife_Checklist_v6_Dec21.zip retrieved August 7, 2022 It is found in Argentina, Bolivia, Brazil, Chile, Paraguay, and Uruguay.Remsen, J. V., Jr., J. I. Areta, E. Bonaccorso, S. Claramunt, A. Jaramillo, D. F. Lane, J. F. Pacheco, M. B. Robbins, F. G. Stiles, and K. J. Zimmer. Version 24 July 2022. Species Lists of Birds for South American Countries and Territories. https://www.museum.lsu.edu/~Remsen/SACCCountryLists.htm retrieved July 24, 2022 Taxonomy and systematics The black-headed duck is the only member of genus ''Heteronetta'' and has no subspecies. It is closely related to the "stiff-tailed" ducks of genera '' Nomonyx'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Duck
Duck is the common name for numerous species of waterfowl in the family (biology), family Anatidae. Ducks are generally smaller and shorter-necked than swans and goose, 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 ancestral species), since swans and geese are not considered ducks. Ducks are mostly aquatic birds, and may be found in both fresh water and sea water. Ducks are sometimes confused with several types of unrelated water birds with similar forms, such as loons or divers, grebes, gallinules and coots. Etymology The word ''duck'' comes from Old English 'diver', a derivative of the verb 'to duck, bend down low as if to get under something, or dive', because of the way many species in the dabbling duck group feed by upending; compare with Dutch language, Dutch and German language, German 'to dive'. This word replaced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maccoa Duck
The Maccoa duck (''Oxyura maccoa'') is a stiff-tailed diving duck found across Eastern and Southern Africa. Description As members of the stiff-tailed duck group, Maccoas are often found wading in the water with their tail feathers cocked upwards. As diving ducks, their bodies are specialized for being agile underwater swimmers and thus have sacrificed the characteristics that allow them to move well on land. As a result, their legs are set further back on their bodies which makes them awkward when walking out of water. Male The breeding male Maccoa stands out with its cobalt blue bill extending from a completely black head and throat. The breast and back are chestnut coloured while the underparts are often greyish-brown, the rump is dark brown, and the tail and feet are black. In flight, the male's off-white underwing feathers and white axillaries can be seen. Non-breeding males closely resemble the females, except for a few points: a darker crown and hints of chestnut colou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Musk Duck
The musk duck (''Biziura lobata'') is a highly aquatic, stiff-tailed duck native to southern Australia. It is the only living member of the genus ''Biziura''. An Extinction, extinct relative, the New Zealand musk duck or de Lautour's duck (''B. delautouri''), once occurred on New Zealand, but is only known from Prehistory, prehistoric subfossil bones. It was about 8% longer than the living species, with a particularly large head. This animal derives its common name from the peculiar musky odour it emanates during the breeding season. Musk ducks are moderately common through the Murray–Darling basin, Murray-Darling and Cooper Creek basins, and in the wetter, fertile areas in the south of the continent: the southwest corner of Western Australia, Victoria (Australia), Victoria, and Tasmania. Description Adult males are long and have a distinctive large, leathery lobe underneath the bill; females are long and unadorned. Their drab dark grey-brown, slightly pin-striped Feather, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Duck
The lake duck (''Oxyura vittata'') is a small, South American stiff-tailed duck. It is also called the Argentine blue-bill, Argentine blue-billed duck, Argentine lake duck, or Argentine ruddy duck. Description The lake duck grows to . Females weigh and males . Males can be distinguished from Andean duck (''Oxyura ferruginea''), a similar species, by being smaller and having a flatter head. Penis The lake duck holds the Guinness World Record for having the largest avian reproductive organ, from a specimen in Córdoba, Argentina that had a penis measuring . It also has the longest penis of any vertebrate in relation to body length. The penis, which is typically coiled up in flaccid state, can reach about the same length as the animal itself when fully erect, but more commonly is about half the bird's length. It has a soft tip and spiny base. It is theorized that the size of their spiny penises with bristled tips may have evolved in response to competitive pressure in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
White-headed Duck
The white-headed duck (''Oxyura leucocephala'') is a small diving duck some long. The male has a white head with black crown, a blue bill, and reddish-grey plumage. The female has a dark bill and rather duller colouring. Its breeding habitat is lakes with open water and dense vegetation at the margin. It dives under water and feeds on aquatic vegetation as well as some animal matter. It is more likely to swim away from a perceived threat than to fly. This duck is known from Spain, North Africa, Western Asia and Central Asia. Populations are declining, mostly due to Habitat destruction, loss of habitat and pollution, and the International Union for Conservation of Nature has rated the bird's status as "endangered species, endangered". Taxonomy and systematics The white-headed duck was originally described as ''Anas leucocephala'' by Giovanni Antonio Scopoli, Giovani Antonio Scopoli in 1769. It is currently in the genus Stiff-tailed duck, Oxyura. Other generic synonyms used in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
