Occurs throughout Great Britain, south of the Great Glen in northern Scotland (7). There are two main populations globally; one is distributed throughout most of Asia, the second occurs in western Europe (4). Where the distributions of carrion and hooded crows meet, there is a zone where interbreeding takes place and hybrids occur, which have intermediate plumage (4). In Great Britain, these hybrids occur in a band roughly between Aberdeen and Glasgow (4).