There are few specific studies providing evidence for the causes of the increase in this species, although evidence presented here shows that increases in breeding success have been important. Birds construct large nests, usually of twigs, and maintain a large breeding territory, producing one brood a year in the spring. They frequent almost all habitats, from uplands to gardens. Carrion Crows are omnivorous, taking grains, invertebrates, eggs, chicks, carrion and whatever else they can scavenge. Unlike Rooks, Carrion Crows are more likely to be solitary, and their call sounds more assertive. The Carrion Crow's all-black plumage and bill sets it apart from the similar sized Hooded Crow and Rook. Carrion Crow numbers are controlled in some areas. In the UK, Carrion Crow numbers steadily rose from the early-1970s to the early-2000s, and have been fairly stable since. In the areas where the two species overlap, including parts of Scotland, Northern Ireland and the Isle of Man, hybrids are found. On the island of Ireland, Carrion Crows occur only on the eastern fringes, while Hooded Crows are found throughout. This large, noisy, intelligent and inquisitive crow is widespread and familiar to many.Ĭarrion Crows are found throughout England and Wales, and most of Scotland apart from the far north-west, where this species is supplanted by its close relative, the Hooded Crow.
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