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The rook is a fairly large bird, at 280 to 340 g (9.9 to 12.0 oz) adult weight, 44 to 46 cm (17 to 18 in) in length and 81 to 99 cm (32 to 39 in) wingspan. [8] It has black feathers that often show a blue or bluish-purple sheen in bright sunlight.
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. Currently, 139 species are included in this family.
The common ancestor of butcherbirds and currawongs diverged from peltops between 28.3 and 16.9 million years ago, which followed the expansion of open habitat in Australia 30 to 25 million years ago. The ancestors of currawongs then diverged from the ancestor of butcherbirds and magpie between 17.3 and 9.8 million years ago. [8]
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.
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.
The rook has a high-pitched kaaa, but the crow's guttural, slightly vibrant, deeper croaked kraa is distinct from any note of the rook. [10] The carrion crow is noisy, perching on a vantage point such as a building or the top of a tree and calling three or four times in quick succession, with a slight pause between each series of croaks.
Each relationship between crow and human can vary from individual to individual, in part due to crow behaviour differing from families and regions. “CrowTok” emphasises how different the bonds ...
A rookery is a colony breeding rooks, and more broadly a colony of several types of breeding animals, generally gregarious [1] birds. [ 2 ] Coming from the nesting habits of rooks, the term is used for corvids and the breeding grounds [ 3 ] of colony-forming seabirds , marine mammals ( true seals or sea lions ), and even some turtles .