Information about Thick Billed Raven
| Thick-billed Raven | ||||||||||||||
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| Corvus crassirostris Rüppell, 1836 | ||||||||||||||
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The Thick-billed Raven (Corvus crassirostris), a Corvid from the Horn of Africa, shares with the Common Raven the distinction of being the largest in the family (60-64 cm in length) and indeed the largest of the bird order Passeriformes (perching birds). It has a very large bill that is laterally compressed and is deeply curved in profile giving the bird a very distinctive appearance. This bill is black with a white tip and has deep nasal grooves with only light nasal bristle covers.
It has very short feathers on the head, throat and neck which on the throat and upper breast, have an oily brown gloss. The rest of the bird is glossy black except for a distinctive white patch of short feathers on the nape and onto the neck.
Distribution and habitat
Its range covers Eritrea and Ethiopia; its habitat includes mountains and high plateau between elevations of 1500 to 2400 metres.Behaviour
Diet
The Thick-billed Raven is omnivorous, feeding on grubs, beetle larvae from animal dung, carrion, scraps of meat, and other human foods. It has been seen taking standing wheat. When seeking food from dung, it has been seen using a distinct scything movement to scatter the dung and extract the grubs.Nesting
It nests in trees and on cliffs, apparently building a stick nest like the similar White-necked Raven. It lays three to five eggs.Voice
Its calls include a harsh nasal croak or a low wheezy croak or sometimes a "raven-raven" sometimes their call is a "dink,dink,dink" sound.External image links
Video links
- Thick-billed Raven videos on the Internet Bird Collection
References
- BirdLife International (2004). Corvus crassirostris. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 12 May 2006. Database entry includes justification for why this species is of least concern
conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. Many factors are taken into account when assessing the conservation status of a species: not simply the number remaining, but the
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Least Concern (LC) is an IUCN category assigned to extant species or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as threatened, nor Near Threatened, nor (prior to 2001) Conservation Dependent.
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Scientific classification or biological classification is a method by which biologists group and categorize species of organisms. Scientific classification also can be called scientific taxonomy, but should be distinguished from folk taxonomy, which lacks scientific basis.
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Chordata
Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Bateson, 1885
Typical Classes
See below
Chordates (phylum Chordata) are a group of animals that includes the vertebrates, together with several closely related invertebrates.
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Aves
Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Passeriformes
Linnaeus, 1758
Suborders
A passerine is a bird of the giant order Passeriformes. More than half of all species of bird are passerines.
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Linnaeus, 1758
Suborders
- Acanthisitti
- Tyranni
- Passeri
A passerine is a bird of the giant order Passeriformes. More than half of all species of bird are passerines.
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Corvidae
Vigors, 1825
Genera
many, see article text
Corvidae is a family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies and nutcrackers (Clayton and Emery 2005, [1] ).
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Vigors, 1825
Genera
many, see article text
Corvidae is a family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies and nutcrackers (Clayton and Emery 2005, [1] ).
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Corvus
Linnaeus, 1758
Species
See text.
The true crows are large passerine birds that comprise the genus Corvus. Ranging in size from the relatively small pigeon-sized jackdaws (Eurasian and Daurian) to the Common Raven of the
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Linnaeus, 1758
Species
See text.
The true crows are large passerine birds that comprise the genus Corvus. Ranging in size from the relatively small pigeon-sized jackdaws (Eurasian and Daurian) to the Common Raven of the
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binomial nomenclature is the formal system of naming species. The system is also called binominal nomenclature (particularly in zoological circles), binary nomenclature (particularly in botanical circles), or the binomial classification system.
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Wilhelm Peter Eduard Simon Rüppell (November 20, 1794 - December 10, 1884) was a German naturalist and explorer. Rüppell is occasionally transliterated to "Rueppell" for the English alphabet.
Rüppell was born at Frankfurt-on-Main, the son of a very prosperous banker.
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Rüppell was born at Frankfurt-on-Main, the son of a very prosperous banker.
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Corvidae
Vigors, 1825
Genera
many, see article text
Corvidae is a family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies and nutcrackers (Clayton and Emery 2005, [1] ).
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Vigors, 1825
Genera
many, see article text
Corvidae is a family of oscine passerine birds that contains the crows, ravens, rooks, jackdaws, jays, magpies, treepies and nutcrackers (Clayton and Emery 2005, [1] ).
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The Horn of Africa (alternatively Northeast Africa, and sometimes Somali Peninsula) is a peninsula of East Africa that juts for hundreds of kilometers into the Arabian Sea, and lies along the southern side of the Gulf of Aden.
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C. corax
Binomial name
Corvus corax
Linnaeus, 1758
Subspecies
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Binomial name
Corvus corax
Linnaeus, 1758
Common Raven range
Subspecies
- C. c. corax
- C. c. varius
- C. c.
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Aves
Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
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Linnaeus, 1758
Orders
About two dozen - see section below
Birds (class Aves) are bipedal, warm-blooded, egg-laying vertebrate animals.
..... Click the link for more information.
Passeriformes
Linnaeus, 1758
Suborders
A passerine is a bird of the giant order Passeriformes. More than half of all species of bird are passerines.
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Linnaeus, 1758
Suborders
- Acanthisitti
- Tyranni
- Passeri
A passerine is a bird of the giant order Passeriformes. More than half of all species of bird are passerines.
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Anthem
Ertra, Ertra, Ertra
Capital
(and largest city) Asmara
Official languages none at national level
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Ertra, Ertra, Ertra
Capital
(and largest city) Asmara
Official languages none at national level
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Ethiopia (IPA: /i.θi.oʊ.pi.ə/) ( ʾĪtyōṗṗyā), officially the
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mountain is a landform that extends above the surrounding terrain in a limited area. A mountain is generally steeper than a hill, but there is no universally accepted standard definition for the height of a mountain or a hill although a mountain usually has an identifiable
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plateau, also called a high plateau or tableland, is an area of highland, usually consisting of relatively flat rural area.
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Genesis
A plateau is a large and highland area of fairly level land separated from surrounding land by steep slopes (as in the Tibet),..... Click the link for more information.
NEST is an abbreviation for one of the following:
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- The Nuclear Emergency Support Team, a team "prepared to respond immediately to any type of radiological accident or incident anywhere in the world".
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tree is a perennial woody plant. It is sometimes defined as a woody plant that attains diameter of 10 cm (30 cm girth) or more at breast height (130 cm above ground).
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cliff or bluff is a significant vertical, or near vertical, rock exposure. Cliffs are categorized as erosion landforms due to the processes of erosion and weathering that produce them. Cliffs are common on coasts, in mountainous areas, escarpments and along rivers.
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C. albicollis
Binomial name
Corvus albicollis
Latham, 1790
The White-necked Raven, Corvus albicollis
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Binomial name
Corvus albicollis
Latham, 1790
The White-necked Raven, Corvus albicollis
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In most birds and reptiles, an egg (Latin ovum) is the zygote, resulting from fertilization of the ovum. To enable incubation the egg is usually kept within a favourable temperature range as it nourishes and protects the growing embryo.
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IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), created in 1963, is the world's most comprehensive inventory of the global conservation status of plant and animal species.
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IUCN
International Organization
Founded October 1948, Fontainebleau, France
Headquarters Rue Mauverney 28, 1196 Gland, Switzerland
Key people Mr Valli Moosa
Ms Julia Marton-Lefèvre
Industry Natural resource conservation
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International Organization
Founded October 1948, Fontainebleau, France
Headquarters Rue Mauverney 28, 1196 Gland, Switzerland
Key people Mr Valli Moosa
Ms Julia Marton-Lefèvre
Industry Natural resource conservation
..... Click the link for more information.
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