Chihuahuan Raven

Information about Chihuahuan Raven

Chihuahuan Raven

Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Corvidae
Genus:	Corvus
Species:	*C. cryptoleucus*

Binomial name

Corvus cryptoleucus
Couch, 1854

The Chihuahuan Raven (Corvus cryptoleucus), formerly known as the American White-necked Raven, has the proportions of a Common Raven with a heavy bill, but is about the same size as a Carrion Crow, or slightly larger (44-51 cm in length) than the American Crow. The plumage is all-black with a rich purple-blue gloss in good light. The nasal bristles extend farther down the top of the bill than in any other Corvus species to about two-thirds the length. The base of the neck feathers are white (seen only when ruffled in strong wind). The bill, legs and feet are black.

Distribution and habitat

Distribution map

It occurs in the southwestern United States and Mexico including southeastern Arizona, southern New Mexico, northeastern Colorado, central and southern Nebraska and, in Mexico.

Behaviour

Diet

It feeds on cultivated cereal grains, insects and many other invertebrates, small reptiles, carrion and scraps of human food, cactus fruits, eggs and nestlings.

Nesting

The nest is built in either trees, large shrubs or sometimes even in old buildings. There are usually 5-7 eggs laid relatively late in the year during May so as to take advantage of the insect food for their young in their more arid environment.

Voice

The voice is similar to the Common Raven with "pruk-pruk" sounds and other croaks but is not as deep in tone or as varied in range.

Taxonomy

A 2005 molecular study reviewed segments of DNA of the Common Raven and found the Chihuahuan Raven are genetically nested within Common Ravens based on mitochondrial DNA. That is Common Ravens from the California Clade are more similar in mtDNA to Chihuahuan Ravens than they are to Common Ravens in the Holarctic Clade.^[1] (also see Omland et al. 2000 -- Omland, K. E., C. L. Tarr, W. I. Boarman, J. M. Marzluff, and R. C. Fleischer. 2000. Cryptic genetic variation and paraphyly in ravens. Proceedings of the Royal Society Biological Sciences Series B 267:2475-2482.)

References

1. ^ Feldman CR, Omland KE (2005) Phylogenetics of the common raven complex (Corvus: Corvidae) and the utility of ND4, COI and intron 7 of the β-fibrinogen gene in avian molecular systematics. Zoologica Scripta 34 145

BirdLife International (2004). Corvus cryptoleucus. 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

Omland, K. E., C. L. Tarr, W. I. Boarman, J. M. Marzluff, and R. C. Fleischer. 2000. Cryptic genetic variation and paraphyly in ravens. Proceedings of the Royal Society Biological Sciences Series B 267:2475-2482.

External links

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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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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Passeriformes
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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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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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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C. corax

Binomial name
Corvus corax
Linnaeus, 1758

Common Raven range

Subspecies

C. c. corax
C. c. varius
C. c.

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C. corone

Binomial name
Corvus corone
Linnaeus, 1758

Carrion Crow range

The Carrion Crow (Corvus corone
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C. brachyrhynchos

Binomial name
Corvus brachyrhynchos
Brehm, 1822

American Crow range

The American Crow, Corvus brachyrhynchos
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Southwestern United States; commonly referred to as The Southwest; is a region of the western United States. Its population is less than three people per cubic mile.
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Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
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Anthem
Himno Nacional Mexicano

Capital
(and largest city) Mexico City

Official languages Spanish (
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Arizona State Symbols
Living Symbols
-Animal Ringtail Cat
-Bird Cactus Wren
-Butterfly Two-Tailed Swallowtail
-Fish Apache Trout
-Flower Saguaro Blossom
-Furbearer Ringtail Cat
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State of New Mexico

Flag of New Mexico Seal
Nickname(s): Land of Enchantment / Tierra del Encanto
Motto(s): Crescit eundo

Capital Santa Fe
Largest city Albuquerque
Largest metro area
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State of Colorado

Flag of Colorado Seal
Nickname(s): The Centennial State
Motto(s): Nil sine numine

Official language(s) English

Capital Denver
Largest city Denver

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State of Nebraska

Flag of Nebraska Seal
Nickname(s): Cornhusker State
Motto(s): Equality before the law

Official language(s) English

Capital Lincoln
Largest city Omaha

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Cactus, see Mammillaria, Melocactus, and Opuntia.

Cacti redirects here. For the software, see Cacti (software).

Cacti

Ferocactus pilosus

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C. corax

Binomial name
Corvus corax
Linnaeus, 1758

Common Raven range

Subspecies

C. c. corax
C. c. varius
C. c.

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The Holarctic is a term used by zoologists to define the ecozone covering much of Eurasia and North America, which have often been connected by the Bering land bridge. The two regions have very similar mammal and bird fauna, with many Eurasian species having moved into North
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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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The Breeding Bird Survey monitors the status and trends of bird populations. Data from the survey are an important source for the range maps found in field guides. The North American Breeding Bird Survey is a joint project of the United States Geological Survey (USGS) and the
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The Christmas Bird Count (CBC) is a census of birds in the Western Hemisphere, performed annually in the early Northern-hemisphere winter by volunteer birders. The purpose is to provide population data for use in science, especially conservation biology, though many people
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Chihuahuan Raven

Information about Chihuahuan Raven

Distribution and habitat

Behaviour

Diet

Nesting

Voice

Taxonomy

References

External links