Corvidae is a biological family of oscine passerine birds that includes some 120 species of crows, ravens, rooks, jays, treepies, jackdaws, choughs, nutcrackers, and magpies. They are medium to large in size, with strong feet and bills, rictal bristles and a single moult each year. The majority of the species are found in tropical South and Central America, southern Asia and Eurasia, with fewer than 10 species each in Africa and Australasia. Most are sedentary and do not migrate significantly. The Corvidae are considered the most intelligent of the birds; social organization is highly developed.
– Corvus cornix L.