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Mareca Strepera - Gadwall XC436359
''Mareca'' is a genus or subgenus of ducks in the family Anatidae that includes the wigeons. The species now placed in this genus were formerly placed in the genus ''Anas''. A molecular phylogentic study comparing mitochondrial DNA sequences published in 2009 found that the genus ''Anas'', as then defined, was not monophyletic. Based on the published phylogeny, the genus ''Anas'' was split into four monophyletic genera with five extant species moved into the resurrected genus ''Mareca''. The genus ''Mareca'' was introduced by English naturalist James Francis Stephens in 1824. The type species is the Eurasian wigeon The Eurasian wigeon or European wigeon (''Mareca penelope''), also known as the widgeon or the wigeon, is one of three species of wigeon in the dabbling duck genus ''Mareca''. It is common and widespread within its Palearctic range. Taxonomy Th .... The name of the genus is from the Portuguese word ''Marreco'' for a small duck. Extant species The genus ''Mareca' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eurasian Wigeon
The Eurasian wigeon or European wigeon (''Mareca penelope''), also known as the widgeon or the wigeon, is one of three species of wigeon in the dabbling duck genus ''Mareca''. It is common and widespread within its Palearctic range. Taxonomy The Eurasian wigeon was described by Carl Linnaeus in his landmark 1758 10th edition of ''Systema Naturae'' under the binomial name ''Anas penelope''. ''Anas'' is the Latin word for "duck", and ''penelope'' refers to a duck that was supposed to have rescued Penelope when she was thrown into the sea. Her name derives from Ancient Greek πήνη ''pene'', "braid" and ὤψ ''ops'' "appearance", from the ruse she used to deter suitors while her husband Ulysses was absent. Description This dabbling duck is long with a wingspan, and a weight of . The breeding male has grey flanks and back, with a black rear end, a dark green speculum and a brilliant white patch on upper wings, obvious in flight or at rest. It has a pink breast, white belly, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falcated Duck
The falcated duck or falcated teal (''Mareca falcata'') is a gadwall-sized dabbling duck from the east Palearctic (East Siberia and Mongolia to North Japan; wintering to India). Taxonomy The closest relative of this species is the gadwall, followed by the wigeons. The species was assigned to the proposed genus ''Mareca'' after its previous placement in the genus ''Anas'' was found to be paraphyletic in 2009. There are many species that have mitochondrial DNA lineages that are phylogenetically intermixed with other species, but studies have rarely tested the cause of such paraphyly. In a study that was conducted, there were tested two hypotheses that could explain mitochondrial paraphyly of Holarctic gadwalls (''Anas strepera'') with respect to Asian falcated ducks (''A. falcata''). First, hybridization could have resulted in falcated duck mitochondrial DNA (mtDNA) introgressing into the gadwall gene pool. Second, gadwalls and falcated ducks could have diverged so recently that mt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Falcated Teal
The falcated duck or falcated teal (''Mareca falcata'') is a gadwall-sized dabbling duck from the east Palearctic (East Siberia and Mongolia to North Japan; wintering to India). Taxonomy The closest relative of this species is the gadwall, followed by the wigeons. The species was assigned to the proposed genus ''Mareca'' after its previous placement in the genus ''Anas'' was found to be paraphyletic in 2009. There are many species that have mitochondrial DNA lineages that are phylogenetically intermixed with other species, but studies have rarely tested the cause of such paraphyly. In a study that was conducted, there were tested two hypotheses that could explain mitochondrial paraphyly of Holarctic gadwalls (''Anas strepera'') with respect to Asian falcated ducks (''A. falcata''). First, hybridization could have resulted in falcated duck mitochondrial DNA (mtDNA) introgressing into the gadwall gene pool. Second, gadwalls and falcated ducks could have diverged so recently that mt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French Southern And Antarctic Lands
The French Southern and Antarctic Lands (french: Terres australes et antarctiques françaises, TAAF) is an Overseas Territory (french: Territoire d'outre-mer or ) of France. It consists of: # Adélie Land (), the French claim on the continent of Antarctica. # Crozet Islands (), a group in the southern Indian Ocean, south of Madagascar. # Kerguelen Islands (), a group of volcanic islands in the southern Indian Ocean, southeast of Africa. # Saint Paul and Amsterdam Islands (), a group to the north of the Kerguelen Islands. # The Scattered Islands (), a dispersed group of islands around the coast of Madagascar. The territory is sometimes referred to as the French Southern Lands (french: Terres australes françaises) or the French Southern Territories, usually to emphasize non-recognition of French sovereignty over Adélie Land as part of the Antarctic Treaty System. The entire territory has no permanently settled inhabitants. Approximately 150 (in the winter) to 310 (in the summ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ÃŽle Amsterdam
Île Amsterdam (), also known as Amsterdam Island and New Amsterdam (''Nouvelle-Amsterdam''), is an island of the French Southern and Antarctic Lands in the southern Indian Ocean that together with neighbouring Île Saint-Paul to the south forms one of the five districts of the territory. The island is roughly equidistant to the land masses of Madagascar, Australia, and Antarctica – as well as the British Indian Ocean Territory and the Cocos (Keeling) Islands (about from each). The research station at Martin-de-Viviès, first called ''Camp Heurtin'' and then ''La Roche Godon'', is the only settlement on the island and is the seasonal home to about thirty researchers and staff studying biology, meteorology, and geomagnetics. History The first person known to have sighted the island was the Spanish explorer Juan Sebastián de Elcano, on 18 March 1522, during his circumnavigation of the world. Elcano did not give the island a name. On 17 June 1633, Dutch mariner Anthonie va ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amsterdam Wigeon
The Amsterdam wigeon (''Mareca marecula'', formerly ''Anas marecula''), also known as the Amsterdam Island duck or Amsterdam duck, was a species of anatid waterfowl, endemic to Île Amsterdam (Amsterdam Island), the French Southern Territories. The flightless species is only known from bones and was presumably driven extinct by visiting sealers and the rats they introduced. A 1696 sighting by William de Vlaming of "four-footed animals" in the reeds of Amsterdam Island may have been of this duck, as there are no native land mammals on the island. No naturalist visited Amsterdam Island until 1874, by which time it was infested with rats from visiting ships, and the duck was extinct. The first bones of this species to be discovered, in 1955–56, were thought to most closely resemble those of a garganey. In 1987 bones of at least 33 individuals were recovered from rock cavities, revealing a very small duck with a short pointed bill like a wigeon's. Strong legs and reduced breastbon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Wigeon
The American wigeon (''Mareca americana''), also known as the baldpate, is a species of dabbling duck found in North America. Formerly assigned to ''Anas'', this species is classified with the other wigeons in the dabbling duck genus ''Mareca''. It is the New World counterpart of the Eurasian wigeon. Taxonomy The American wigeon was formally described in 1789 by German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's ''Systema Naturae''. He placed it with all the other ducks, geese and swans in the genus ''Anas'' and coined the binomial name ''Anas americana''. Gmelin based his description on Edme-Louis Daubenton's hand-colour plate of "Le Canard Jensen, de la Louisiane" and Thomas Pennant's description of the "American wigeon" in his ''Arctic Zoology''. Pennant had been sent a specimen from New York. The American wigeon is now placed with the Eurasian wigeon and three other dabbling ducks in the genus ''Mareca'' that was introduced in 182 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Wigeon - Anas Americana, Oakley Street, Cambridge, Maryland
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the southern subregion of a single continent called America. South America is bordered on the west by the Pacific Ocean and on the north and east by the Atlantic Ocean; North America and the Caribbean Sea lie to the northwest. The continent generally includes twelve sovereign states: Argentina, Bolivia, Brazil, Chile, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela; two dependent territories: the Falkland Islands and South Georgia and the South Sandwich Islands; and one internal territory: French Guiana. In addition, the ABC islands of the Kingdom of the Netherlands, Ascension Island (dependency of Saint Helena, Ascension and Tristan da Cunha, a British Overseas Territory), Bouvet Island ( dependency of Norway), Pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chiloé Wigeon
The Chiloé wigeon (''Mareca sibilatrix''), also known as the southern wigeon, is one of three extant species of wigeon in the genus ''Mareca'' of the dabbling duck subfamily. This bird is indigenous to the southern part of South America, including the Chiloé Archipelago. In its native range, it is called the ("piebald duck") or ("royal duck"), although the latter name also refers to the Muscovy in the wild. Its specific epithet, '' sibilatrix'', means 'whistler', referring to the bird's call. Description The Chiloé wigeon has a body length of and a wingspan of . The wing length is about and the weight is approximately . This bird has an iridescent green-blue cap on its head, and a bluish gray bill with a black tip. The cheeks and forehead are white, the eyes are dark brown, and there is a white auricular patch. The neck and occipital part of the head are black. The breast is barred black and white and the plumage of the wings is gray and white. The flanks of males are ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A Splash Of Colour! (8509419367)
A, or a, is the first letter and the first vowel of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''a'' (pronounced ), plural ''aes''. It is similar in shape to the Ancient Greek letter alpha, from which it derives. The uppercase version consists of the two slanting sides of a triangle, crossed in the middle by a horizontal bar. The lowercase version can be written in two forms: the double-storey a and single-storey É‘. The latter is commonly used in handwriting and fonts based on it, especially fonts intended to be read by children, and is also found in italic type. In English grammar, " a", and its variant " an", are indefinite articles. History The earliest certain ancestor of "A" is aleph (also written 'aleph), the first letter of the Phoenician alphabet, which consisted entirely of consonants (for that reason, it is also called an abjad to distinguish it fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Falcated Duck")
