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Raven Rotor-Plane
A raven is any of several larger-bodied bird species of the genus ''Corvus''. These species do not form a single taxonomic group within the genus. There is no consistent distinction between "crows" and "ravens", common names which are assigned to different species chiefly on the basis of their size. The largest raven species are the common raven and the thick-billed raven. Etymology The term "raven" originally referred to the common raven (''Corvus corax''), the type species of the genus ''Corvus'', which has a larger distribution than any other species of ''Corvus'', ranging over much of the Northern Hemisphere. The modern English word ''raven'' has cognates in all other Germanic languages, including Old Norse (and subsequently modern Icelandic) and Old High German , all of which descend from Proto-Germanic . Collective nouns for a group of ravens (or at least the common raven) include "rave", "treachery", "unkindness" and "conspiracy". In practice, most people use the more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3782 Common Raven In Flight
__NOTOC__ Year 378 (Roman numerals, CCCLXXVIII) was a common year starting on Monday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Valens and Augustus (or, less frequently, year 1131 ''Ab urbe condita''). The denomination 378 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years. Events By place Roman Empire * Spring – Emperor Valens returns to Constantinople and mobilises an army (40,000 men). He appoints Sebastianus (magister peditum), Sebastianus, newly arrived from Italy, as ''magister militum'' to reorganize the Roman armies in Thrace. * February – The Lentienses (part of the Alemanni) cross the frozen Rhine and raid the countryside. They are driven back by Roman ''auxilia palatina'' (Celtae and Petulantes), who defend the western frontier. * May – Battle of Argentovaria: Emperor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corvus Coronoides
The Australian raven (''Corvus coronoides'') is a passerine bird in the genus ''Corvus'' native to much of southern and northeastern Australia. Measuring in length, it has all-black plumage, beak and mouth, as well as strong grey-black legs and feet. The upperparts are glossy, with a purple, blue, or green sheen, and its black feathers have grey bases. The Australian raven is distinguished from the Australian crow species by its throat hackles, which are prominent in adult birds. Older adult individuals have white irises, younger adults have white irises with an inner blue rim, while younger birds have dark brown irises until fifteen months of age, and hazel irises with an inner blue rim around each pupil until age two years and ten months. Nicholas Aylward Vigors and Thomas Horsfield described the Australian raven in 1827, its species name (''coronoides'') highlighting its similarity with the carrion crow (''C. corone''). Two subspecies are recognized, which differ slightly in c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chihuahuan Raven
The Chihuahuan raven (''Corvus cryptoleucus'') is a species of crow in the family Corvidae that is native to the United States and Mexico. Description The proportions resemble the common raven with a heavy bill, but is about the same size as a carrion crow, or slightly larger than the American crow ( long). The plumage is all-black with a rich purple-blue gloss in good light. Like the forest raven, little raven, fan-tailed raven and Australian raven, it is one of the smaller raven species. The larger species of raven are the common raven, thick-billed raven, white-necked raven and brown-necked raven, with the common and thick-billed ravens being the world's largest raven species and the little and fan-tailed ravens being the smallest. The Chihuahuan raven is similar in appearance to the Australian raven, although with dark brown irises and whiter feather bases. The nasal bristles extend farther down the top of the bill than in any other ''Corvus'' species to about two-thirds the l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pied Raven
The pied raven (''Corvus corax varius'' morpha ''leucophaeus'') is an extinct colour morph of the North Atlantic subspecies of the common raven which was only found on the Faroe Islands and was last seen in 1902. It had large areas of white feathering, most frequently on the head, the wings and the belly and its beak was light brown. Apart from that, it looked like the black North Atlantic ravens (''C. c. varius'' morpha ''typicus''). History The pied raven received binomial names such as ''Corvus leucophaeus'' (by Vieillot, 1817) and ''Corvus leucomelas'' (by Wagler, 1827). It is currently referred to as ''Corvus corax varius'' morpha ''leucophaeus''. Description In modern Faroese, the bird is called ''hvítravnur'' ("white raven"), older name ''gorpur bringu hvíti'' ("white-chested corbie"). Normal individuals of the subspecies ''varius'', which is found on Iceland and the Faroe Islands, already show a tendency towards more extensive white feather bases compared with the no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corvus Corax Varius Morpha Leucophaeus
''Corvus'' is a widely distributed genus of medium-sized to large birds in the family Corvidae. It includes species commonly known as crows, ravens and rooks. The species commonly encountered in Europe are the carrion crow, the hooded crow, the common raven and the rook; those discovered later were named "crow" or "raven" chiefly on the basis of their size, crows generally being smaller. The genus name is Latin for "crow". The 45 or so members of this genus occur on all temperate continents except South America, and several islands. The ''Corvus'' genus makes up a third of the species in the family Corvidae. The members appear to have evolved in Asia from the corvid stock, which had evolved in Australia. The collective name for a group of crows is a "flock" or a "murder". Recent research has found some crow species capable of not only tool use, but also tool construction. Crows are now considered to be among the world's most intelligent animals with an encephalization quotie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
