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Corvus is a widely distributed genus of passerine birds ranging from medium-sized to large-sized in the family Corvidae. It includes species commonly known as crows , ravens , and rooks. The species commonly encountered in Europe are the carrion crow , hooded crow , common raven , and rook ; those discovered later were named "crow" or "raven ...
The common raven or northern raven (Corvus corax) is a large all-black passerine bird. It is the most widely distributed of all corvids , found across the Northern Hemisphere . There are 11 accepted subspecies with little variation in appearance, although recent research has demonstrated significant genetic differences among populations from ...
The largest corvids are the common raven (Corvus corax) and the thick-billed raven (Corvus crassirostris), both of which regularly exceed 1,400 grams (3.1 pounds) and 65 cm (26 in). Species can be identified based on size, shape, and geography; however, some, especially the Australian crows , are best identified by their raucous calls.
The genus contains 50 species: [1] Corvus splendens Vieillot, 1817 – house crow or Indian house crow (Indian subcontinent, Southeast Asia, Middle East, eastern Africa); Corvus moneduloides Lesson, RP, 1831 – New Caledonian crow (New Caledonia)
The hooded crow (Corvus cornix), formerly regarded as a subspecies, has been split off as a separate species, and there is some discussion whether the eastern carrion crow (C. c. orientalis) is distinct enough to warrant specific status; the two taxa are well separated, and it has been proposed they could have evolved independently in the ...
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 ecological niche .
The Australian raven (Corvus coronoides) is a passerine corvid bird native to Australia. Measuring 46–53 centimetres (18–21 in) in length, it has an all-black plumage, beak and mouth, as well as strong, greyish-black legs and feet. The upperparts of its body are glossy, with a purple-blue, greenish sheen; its black feathers have grey bases.
Its plumage is velvet-black, green-glossed on the body, and it has a long curved red bill and red legs. The sexes are similar (although adults can be sexed in the hand using a formula involving tarsus length and bill width [ 25 ] ) but the juvenile has an orange bill and pink legs until its first autumn, and less glossy plumage.