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Barrow's Goldeneye
Barrow's goldeneye (''Bucephala islandica'') is a medium-sized sea duck of the genus '' Bucephala'', the goldeneyes. This bird was named after Sir John Barrow. The genus name is derived from Ancient Greek ''boukephalos'', "bullheaded", from ''bous'', "bull" and ''kephale'', "head", a reference to the bulbous head shape of the bufflehead. The species name ''islandica'' means Iceland. Taxonomy Barrow's goldeneye was formally described in 1789 by the German naturalist Johann Friedrich Gmelin in his revised and expanded edition of Carl Linnaeus's ''Systema Naturae''. He placed it with the ducks, geese and swans in the genus ''Anas'' and coined the binomial name ''Anas islandica''. Gmelin based his description on the "Hravn Oend" that had been briefly described in 1776 by Danish naturalist Otto Friedrich Müller. Barrow's goldeneye is now placed with the common goldeneye and the bufflehead in the genus '' Bucephala'' that was introduced in 1858 by American naturalist Spencer Baird. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johann Friedrich Gmelin
Johann Friedrich Gmelin (8 August 1748 – 1 November 1804) was a German natural history, naturalist, chemist, botanist, entomologist, herpetologist, and malacologist. Education Johann Friedrich Gmelin was born as the eldest son of Philipp Friedrich Gmelin in 1748 in Tübingen. He studied medicine under his father at University of Tübingen and graduated with a Master's degree in 1768, with a thesis entitled: ', defended under the presidency of Ferdinand Christoph Oetinger, whom he thanks with the words '. Career In 1769, Gmelin became an adjunct professor of medicine at University of Tübingen. In 1773, he became professor of philosophy and adjunct professor of medicine at University of Göttingen. He was promoted to full professor of medicine and professor of chemistry, botany, and mineralogy in 1778. He died in 1804 in Göttingen and is buried there in the Albanifriedhof, Albani cemetery with his wife Rosine Louise Gmelin (1755–1828, née Schott). Johann Friedrich Gm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical syste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Birds Of Iceland
Birds are a group of warm-blooded vertebrates constituting the class Aves (), characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton. Birds live worldwide and range in size from the bee hummingbird to the common ostrich. There are over 11,000 living species and they are split into 44 orders. More than half are passerine or "perching" birds. Birds have wings whose development varies according to species; the only known groups without wings are the extinct moa and elephant birds. Wings, which are modified forelimbs, gave birds the ability to fly, although further evolution has led to the loss of flight in some birds, including ratites, penguins, and diverse endemic island species. The digestive and respiratory systems of birds are also uniquely adapted for flight. Some bird species of aquatic environments, particularly seabirds and some waterbirds, have furthe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bucephala (bird)
''Bucephala'' is a genus of diving ducks found in the Northern Hemisphere. Taxonomy The genus ''Bucephala'' was introduced in 1858 by American naturalist Spencer Fullerton Baird, Spencer Baird with the bufflehead as the type species. The genus name is derived from Ancient Greek , meaning , from , and , , a reference to the crest of the bufflehead making its head look large. The bufflehead was formerly treated as the only member of the genus (sometimes unnecessarily changed to ''Charitonetta'') while the goldeneyes were incorrectly placed in ''Clangula'' (as ''Clangula americana''), the genus of the long-tailed duck, which at that time was placed in ''Harelda''. It may yet be correct to recognise two genera, as the bufflehead and the two goldeneyes are well diverged. In this case, ''Bucephala'' would be restricted to ''B. albeola'' and the name ''Glaucionetta'' (Stejneger, 1885) resurrected for the goldeneyes. Species The three living species are: Known fossil taxa a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Exxon Valdez Oil Spill
The ''Exxon Valdez'' oil spill was a major environmental disaster that occurred in Alaska's Prince William Sound on March 24, 1989. The spill occurred when ''Exxon Valdez'', an oil supertanker owned by Exxon Shipping Company, bound for Long Beach, California, Long Beach, California, struck Prince William Sound's Bligh Reef, west of Tatitlek, Alaska at 12:04 a.m. The tanker oil spill, spilled more than (or 37,000 tonnes) of Petroleum, crude oil over the next few days. The ''Exxon Valdez'' spill is the second largest in U.S. waters, after the 2010 Deepwater Horizon oil spill, ''Deepwater Horizon'' oil spill, in terms of volume of oil released. It is the List of disasters by cost, costliest disaster ever with no direct human fatalities. Prince William Sound's remote location, accessible only by helicopter, plane, or boat, made government and industry response efforts difficult and made existing response plans especially hard to implement. The region is a habitat for salmon, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bucephala Islandica MWNH 1021
Bucephala may refer to: * ''Bucephala'' (bird), the goldeneye, a duck genus * Bucephala is the name of at least two cities: ** ''Bucephala'', or Alexandria Bucephalus, a city in Punjab founded by Alexander the Great and named in honor of his horse, Bucephalus ** Bucephala Acra, a city located on a promontory near Troezen Troezen (; ancient Greek: Τροιζήν, modern Greek: Τροιζήνα ) is a small town and a former municipality in the northeastern Peloponnese, Greece, on the Argolid Peninsula. Since the 2011 local government reform it is part of the munic ... in the Argolid See also * Bucephalus (other) * Cow head (other) * Bullhead (other) {{disambiguation Taxonomy disambiguation pages ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Condor (journal)
''Ornithological Applications'', formerly ''The Condor'' and ''The Condor: Ornithological Applications'', is a peer-reviewed quarterly scientific journal covering ornithology. It is an official journal of the American Ornithological Society. History The journal was first published in 1899 as the ''Bulletin of the Cooper Ornithological Club'' by the Cooper Ornithological Club (later Cooper Ornithological Society), a California-based ornithological society. In 1900, the journal was renamed as ''The Condor''. It published ornithological research, and through the 1950s, its scope was regional, focusing on the western United States. An editorial board was established in 1951 to address increasing submissions to the journal. James R. King, editor-in-chief following 1965, instituted an external peer review system. Moreover, King broadened the journal's geographic scope. By 1966, at least 40% of papers published in ''The Condor'' were written by scientists outside the United States. In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europe
Europe is a continent located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south, and Asia to the east. Europe shares the landmass of Eurasia with Asia, and of Afro-Eurasia with both Africa and Asia. Europe is commonly considered to be Boundaries between the continents#Asia and Europe, separated from Asia by the Drainage divide, watershed of the Ural Mountains, the Ural (river), Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea, and the waterway of the Bosporus, Bosporus Strait. "Europe" (pp. 68–69); "Asia" (pp. 90–91): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Black Sea with its outlets, the Bosporus and Dardanelles." Europe covers approx. , or 2% of Earth#Surface, Earth's surface (6.8% of Earth's land area), making it ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bird Migration
Bird migration is a seasonal movement of birds between breeding and wintering grounds that occurs twice a year. It is typically from north to south or from south to north. Animal migration, Migration is inherently risky, due to predation and mortality. The Arctic tern holds the long-distance migration record for birds, travelling between Arctic breeding grounds and the Antarctic each year. Some species of Procellariiformes, tubenoses, such as albatrosses, circle the Earth, flying over the southern oceans, while others such as Manx shearwaters migrate between their northern breeding grounds and the southern ocean. Shorter migrations are common, while longer ones are not. The shorter migrations include altitudinal migrations on mountains, including the Andes and Himalayas. The timing of migration seems to be controlled primarily by changes in day length. Migrating birds navigate using celestial cues from the Sun and stars, the Earth's magnetic field, and mental maps. Histor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scottish Ornithologists' Club
The Scottish Ornithologists' Club (SOC) is a Scottish ornithological body, founded in March 1936 at the premises of the Royal Scottish Geographical Society. As of 2008, the SOC has 2,200 members. The Club runs the Scottish Birds Records Committee, which maintains a list of birds recorded in Scotland. In 2007, the club was awarded the Silver Medal by the Zoological Society of London. The SOC publishes a quarterly journal entitled ''Scottish Birds''. Waterston House The SOC has its headquarters at Waterston House in Aberlady, East Lothian. The building overlooks Aberlady Bay and the Aberlady Local Nature Reserve, the first LNR in the United Kingdom. The building is named after George Waterston (1911–1980), an ornithologist and conservationist who was Director of the Royal Society for the Protection of Birds (RSPB) in Scotland. It is said to house the most comprehensive ornithological library in Scotland, with over 3,500 volumes. Waterston House's art gallery space is named a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mývatn
Mývatn () is a shallow lake situated in an area of active volcanism in the north of Iceland, near Krafla volcano. It has a high amount of biological activity. The lake and the surrounding wetlands provides a habitat for a number of waterbirds, especially ducks. The lake was created by a large basaltic lava eruption 2300 years ago, and the surrounding landscape is dominated by volcanic landforms, including lava pillars and rootless vents ( pseudocraters). The effluent river Laxá is known for its rich fishing for brown trout and Atlantic salmon. The name of the lake ( Icelandic (" midge") and ("lake"); "the lake of midges") comes from the large numbers of midges present in the summer. The name Mývatn is sometimes used not only for the lake but the whole surrounding inhabited area. The river Laxá, the lake Mývatn and the surrounding wetlands are protected as a nature reserve (the Mývatn–Laxá Nature Conservation Area), which occupies . Since 2000, a marathon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Canada
Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of countries and dependencies by area, second-largest country by total area, with the List of countries by length of coastline, world's longest coastline. Its Canada–United States border, border with the United States is the world's longest international land border. The country is characterized by a wide range of both Temperature in Canada, meteorologic and Geography of Canada, geological regions. With Population of Canada, a population of over 41million people, it has widely varying population densities, with the majority residing in List of the largest population centres in Canada, urban areas and large areas of the country being sparsely populated. Canada's capital is Ottawa and List of census metropolitan areas and agglomerations in Canada, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
