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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 .
Pair of crows chasing away a red-tailed hawk from their nest. The American crow (Corvus brachyrhynchos) is a large passerine bird species of the family Corvidae. It is a common bird found throughout much of North America. American crows are the New World counterpart to the carrion crow and the hooded crow of Eurasia; they all occupy the same ...
Corvidae is a cosmopolitan family of oscine passerine birds that contains the crows, ravens, rooks, magpies, jackdaws, jays, treepies, choughs, and nutcrackers. [1] [2] [3] In colloquial English, they are known as the crow family or corvids.
C. a. septentrionalis Wied-Neuwied, 1839 is known as the eastern turkey vulture: The eastern and western turkey vultures differ in tail and wing proportions. It is less migratory than C. a. meridionalis and rarely migrates to areas south of the United States. [21] It ranges from southeastern Canada south through the eastern United States.
The nest resembles that of the carrion crow, but on the coast, seaweed is often interwoven in the structure, and animal bones and wire are also frequently incorporated. [ 18 ] [ 20 ] The four to six brown-speckled blue eggs are 4.3 cm × 3.0 cm ( 1 + 3 ⁄ 4 in × 1 + 1 ⁄ 8 in) in size and weigh 19.8 g ( 11 ⁄ 16 oz), of which 6% is shell ...
The Hawaiian crow or ʻalalā (Corvus hawaiiensis) is a species of bird in the crow family, Corvidae, that is currently extinct in the wild, though reintroduction programs are underway. It is about the size of the carrion crow at 48–50 cm (19–20 in) in length, [ 3 ] but with more rounded wings and a much thicker bill.
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 (44–51 cm (17–20 in) long). The plumage is all-black with a rich purple-blue gloss in good light.