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The carrion crow has a wingspan of 84–100 centimetres (33–39 in) and weighs 400–600 grams (14 oz – 1 lb 5 oz). Juvenile carrion crows can be identified by their brownish plumage and blue eyes, both of which darken to black and brown as the crow grows older.
The eastern carrion crow (Corvus corone orientalis, originally a separate species C.orientalis) is a member of the crow family and a subspecies of the carrion crow. Differences from the nominate subspecies include a larger size, at a length about 500 millimetres (20 in), and more graduated outer tail feathers .
A carrion crow scavenging on a beach in Dorset, England. A crow (pronounced / ˈ k r oʊ /) is a bird of the genus Corvus, or more broadly, a synonym for all of Corvus.The word "crow" is used as part of the common name of many species.
Carrion is an important food source for large carnivores and omnivores in most ecosystems. Examples of carrion-eaters (or scavengers ) include crows , vultures , humans , hawks , eagles , [ 1 ] hyenas , [ 2 ] Virginia opossum , [ 3 ] Tasmanian devils , [ 4 ] coyotes [ 5 ] and Komodo dragons .
Hooded crow (Corvus cornix) in flight Jungle crow (Corvus macrorhynchos) scavenging on a dead shark at a beach in Kumamoto, Japan. Medium-large species are ascribed to the genus, ranging from 34 cm (13 in) of some small Mexican species to 60–70 cm (24–28 in) of the large common raven and thick-billed raven, which together with the lyrebird represent the larger passerines.
One carrion crow was documented cracking nuts by placing them on a crosswalk, letting the passing cars crack the shell, waiting for the light to turn red, and then safely retrieving the contents. [59] A group of crows in England took turns lifting garbage bin lids while their companions collected food. [citation needed]
The hooded crow is omnivorous, with a diet similar to that of the carrion crow, and is a constant scavenger. It drops molluscs and crabs to break them after the manner of the carrion crow, to the point that an old Scottish name for empty sea urchin shells was "crow's cups". [18]
Corvus corone Linnaeus, 1758 – carrion crow Corvus cornix Linnaeus , 1758 – hooded crow ( northern and eastern Europe and northern Africa ) Corvus torquatus Lesson, RP , 1831 – collared crow (eastern China south into Vietnam )