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Raven (bird)
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 mor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
3782 Common Raven In Flight
__NOTOC__ Year 378 ( 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, 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 Gratian is forced to recall the army he has ... [...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 ... [...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 qu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Zealand Raven
The New Zealand raven (''Corvus antipodum'') was native to the North Island and South Island of New Zealand but has been extinct since the 16th century. There were two subspecies: the North Island raven (''Corvus antipodum antipodum'') and the South Island raven (''Corvus antipodum pycrofti''). Another closely related species, the Chatham raven (''Corvus moriorum''), occurred on the Chatham Islands. The holotype of the South Island raven (''Corvus antipodum pycrofti'') is in the collection of the Museum of New Zealand Te Papa Tongarewa. New Zealand ravens were large corvids with long, broad bills that were not as arched as those of some of the Hawaiian crows (''Corvus hawaiiensis''). They were significantly smaller than the Chatham Island raven, and the South Island subspecies was rather larger than the North Island subspecies. Remains of New Zealand ravens are most common in Pleistocene and Holocene coastal sites. On the coast, it may have frequented seal and penguin colonies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corvus Antipodum
The New Zealand raven (''Corvus antipodum'') was native to the North Island and South Island of New Zealand but has been extinct since the 16th century. There were two subspecies: the North Island raven (''Corvus antipodum antipodum'') and the South Island raven (''Corvus antipodum pycrofti''). Another closely related species, the Chatham raven (''Corvus moriorum''), occurred on the Chatham Islands. The holotype of the South Island raven (''Corvus antipodum pycrofti'') is in the collection of the Museum of New Zealand Te Papa Tongarewa. New Zealand ravens were large corvids with long, broad bills that were not as arched as those of some of the Hawaiian crows (''Corvus hawaiiensis''). They were significantly smaller than the Chatham Island raven, and the South Island subspecies was rather larger than the North Island subspecies. Remains of New Zealand ravens are most common in Pleistocene and Holocene coastal sites. On the coast, it may have frequented seal and penguin colon ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chatham Raven
The Chatham raven (''Corvus moriorum'') is a prehistoric raven formerly native to the Chatham Islands (New Zealand). The closely related New Zealand raven, ''C. antipodum'' occurred in the North and South Islands of New Zealand. ''C. antipodum'' was formerly included in ''C. moriorum'', and later considered a distinct species, however in 2017 genetic research determined that the two raven populations were subspecies rather than separate species, having only split 130,000 years ago. A reconstruction of the raven is in the Museum of New Zealand Te Papa Tongarewa, specimen MNZ S.036749. Description and ecology The Chatham raven was significantly larger than the New Zealand raven, and probably the world's fourth- or fifth-largest passerine. They had long, broad bills that were not as arched as those of some of the Hawaiian crows (''C. hawaiiensis''). Presumably, they were black all over like all their close relatives. There do not seem to be recorded oral traditions of this sub-spec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corvus Moriorum
The Chatham raven (''Corvus moriorum'') is a prehistoric raven formerly native to the Chatham Islands (New Zealand). The closely related New Zealand raven, ''C. antipodum'' occurred in the North and South Islands of New Zealand. ''C. antipodum'' was formerly included in ''C. moriorum'', and later considered a distinct species, however in 2017 genetic research determined that the two raven populations were subspecies rather than separate species, having only split 130,000 years ago. A reconstruction of the raven is in the Museum of New Zealand Te Papa Tongarewa, specimen MNZ S.036749. Description and ecology The Chatham raven was significantly larger than the New Zealand raven, and probably the world's fourth- or fifth-largest passerine. They had long, broad bills that were not as arched as those of some of the Hawaiian crows (''C. hawaiiensis''). Presumably, they were black all over like all their close relatives. There do not seem to be recorded oral traditions of this sub- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corvus Tasmanicus
The forest raven (''Corvus tasmanicus''), also commonly known as the Tasmanian raven, is a passerine bird in the family Corvidae native to Tasmania and parts of southern Victoria, such as Wilsons Promontory and Portland. Populations are also found in parts of New South Wales, including Dorrigo and Armidale. Measuring in length, it has all-black plumage, beak and legs. As with the other two species of raven in Australia, its black feathers have grey bases. Adults have white irises; younger birds have dark brown and then hazel irises with an inner blue rim. New South Wales populations are recognised as a separate subspecies ''C. tasmanicus boreus'', but appear to be nested within the Tasmanian subspecies genetically. The forest raven lives in a wide variety of habitats in Tasmania but is restricted to more closed forest on mainland Australia. Breeding takes place in spring and summer, occurring later in Tasmania than in New South Wales. The nest is a bowl-shaped structure of sti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corvus Ruficollis
The brown-necked raven (''Corvus ruficollis'') is a larger bird (52–56 cm in length) than the carrion crow though not as large as the common raven. It has similar proportions to the common raven but the bill is not so large or deep and the wings tend to be a little more pointed in profile. The head and throat are a distinct brownish-black giving the bird its English name, while the rest of the plumage is black glossed with purple, blue or purplish-blue. Like the common raven, thick-billed raven and white-necked raven, it is one of the larger raven species. The feathers of this species often fade quite quickly to a brownish black (even the truly black feathers) and the bird can look distinctly brown by the time it moults. The feet, legs and bill are black. The dwarf raven was formerly considered a subspecies (''Corvus ruficollis edithae'') but this bird now appears to be closer to the pied crow (''C. albus'') than this species. Distribution and habitat This species ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corvus Rhipidurus
The fan-tailed raven (''Corvus rhipidurus'') is a passerine bird of the crow family native to Eastern Africa and the Arabian Peninsula. Description The fan-tailed raven is completely black including bill, legs and feet and the plumage has a purplish-blue gloss in good light. Worn plumage is slightly coppery-brown. The base of the feathers on the upper neck are white and only seen if the bird is inspected or a strong gust blows them the wrong way. The throat hackles are shorter than in most other ravens. One of the smaller raven species, it is about the same size or slightly larger than the carrion crow, at 47–51 cm, but with a much thicker bill, shorter tail and much larger wings. The voice is described as guttural croaks mixed with the sound of frog-call. Like all corvids, the fan-tailed raven is capable of vocal mimicry; however, this behavior is mostly recorded in captivity and, very rarely, in the wild. Distribution and habitat It occurs in the Middle East, North Afr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
