Information about Fish Crow
| Fish Crow | ||||||||||||||
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| Corvus ossifragus Wilson, 1812 | ||||||||||||||
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The Fish Crow (Corvus ossifragus) is a typical crow in appearance that is associated with wetland habitats.
Description
The Fish Crow is superficially similar to the American Crow but is smaller (36–41 cm in length) and has a more silky smooth plumage by comparison. The differences are often only really apparent between the two species when side by side or, when heard calling. The bill is usually somewhat slimmer than the American Crow also but again, this may not help much when there is no other bird for comparison.Visual differentiation from the American crow is extremely difficult and often innacurrate. Nonetheless, differences apart from size do exist. Fish crows tend to have more slender bills and feet. There may also be a small sharp hook at the end of the upper bill. Fish crows also appear as if they have shorter legs when walking. More dramatically, when calling, fish crows tend to hunch and fluff their throat feathers.
The voice is the most outwardly differing characteristic for this species and other American Crow species. Describes as a nasal and hoarse "ark-ark-ark" including a begging "waw-waw".
Taxonomy
The latest genetic testing now seems to indicate that this species is close to both the Sinaloan Crow, (Corvus sinaloae) and the Tamaulipas Crow, (Corvus imparatus) and not as close to the American Crow, (Corvus brachyrhynchos) as outward signs would suggest.Distribution and habitat
This species occurs on the eastern seaboard of the United States from the state of Rhode Island south to the northern part of the Gulf of Mexico and follows many river systems inland for quite some distance. Coastal marshes and beaches are frequented, also rivers, inland lakes and marshes, river banks, and the land immediately surrounding all.Behavior
Diet
Food is taken mainly from the ground and even in shallow water where the bird will hover and pluck food items out of the water with its feet. Small crustaceans such as crabs, shrimps, other invertebrates, stranded fish and live fish if the situation favors their capture, eggs and nestlings, small reptiles and fruits of many trees, peanuts and grains, human scraps where available.Breeding
The nest is usually built high in a tree and is often accompanied in nearby trees with other nests of the same species forming small, loose colonies. There are usually 4-5 eggs laid.Conservation
This species appears to be somewhat more resistant to West Nile Virus than the American crow. Survival rates of up to 45% have been reported for fish crows, compared with near zero for the American species.References
- BirdLife International (2004). Corvus ossifragus. 2006 IUCN Red List of Threatened Species. IUCN 2006. Retrieved on 09 May 2006. Database entry includes justification for why this species is of least concern
External links
- Differences between American and Fish Crows
- Fish Crow videos on the Internet Bird Collection
Sound link
Image 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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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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Alexander Wilson (July 6, 1766 – August 23, 1813) was a Scottish-American poet, ornithologist, naturalist and illustrator.
Wilson was born in Paisley, Scotland, the son of an illiterate distiller. In 1779 he was apprenticed as a weaver.
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Wilson was born in Paisley, Scotland, the son of an illiterate distiller. In 1779 he was apprenticed as a weaver.
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19th century - 20th century
1780s 1790s 1800s - 1810s - 1820s 1830s 1840s
1809 1810 1811 - 1812 - 1813 1814 1815
:
Subjects: Archaeology - Architecture -
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1780s 1790s 1800s - 1810s - 1820s 1830s 1840s
1809 1810 1811 - 1812 - 1813 1814 1815
:
Subjects: Archaeology - Architecture -
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C. brachyrhynchos
Binomial name
Corvus brachyrhynchos
Brehm, 1822
The American Crow, Corvus brachyrhynchos
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Binomial name
Corvus brachyrhynchos
Brehm, 1822
American Crow range
The American Crow, Corvus brachyrhynchos
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C. sinaloae
Binomial name
Corvus sinaloae
Davis, 1958
The Sinaloan Crow or Sinaloa Crow (Corvus sinaloae) is a crow native to western Mexico.
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Binomial name
Corvus sinaloae
Davis, 1958
The Sinaloan Crow or Sinaloa Crow (Corvus sinaloae) is a crow native to western Mexico.
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C. imparatus
Binomial name
Corvus imparatus
Peters, 1929
The Tamaulipas Crow (Corvus imparatus
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Binomial name
Corvus imparatus
Peters, 1929
The Tamaulipas Crow (Corvus imparatus
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C. brachyrhynchos
Binomial name
Corvus brachyrhynchos
Brehm, 1822
The American Crow, Corvus brachyrhynchos
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Binomial name
Corvus brachyrhynchos
Brehm, 1822
American Crow range
The American Crow, Corvus brachyrhynchos
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State of Rhode Island
and Providence Plantations
Flag of Rhode Island Seal
Nickname(s): The Ocean State, Little Rhody
Motto(s): Hope
Official language(s) English
Capital Providence
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and Providence Plantations
Flag of Rhode Island Seal
Nickname(s): The Ocean State, Little Rhody
Motto(s): Hope
Official language(s) English
Capital Providence
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The Gulf of Mexico is the ninth largest body of water in the world. It is an ocean basin largely surrounded by the North American continent and the island of Cuba. It is bounded on the northeast, north and northwest by the Gulf Coast of the United States, on the southwest and
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crustaceans (Crustacea) are a large group of arthropods, comprising approximately 52,000 described species [1], and are usually treated as a subphylum [2].
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Brachyura
Latreille, 1802
Superfamilies
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Latreille, 1802
Superfamilies
- Section Dromiacea
- Homolodromioidea
- Dromioidea
- Homoloidea
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The SHRIMP (Sensitive High Resolution Ion Microprobe) is a large-diameter, double focusing secondary ion mass spectrometer (SIMS). The SHRIMP is primarily used for geological and geochemical applications.
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West Nile virus (WNV) is a virus of the family Flaviviridae; part of the Japanese encephalitis (JE) antigenic complex of viruses, it is found in both tropical and temperate regions.
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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
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