The Rock Dove (Columba livia), also known as the Street Pigeon or the Feral Pigeon, crowds streets and public squares, living on discarded food and offerings of birdseed. It is the wild ancestor of domestic pigeons the world over. Wild rock doves are pale grey with two black bars on each wing, while domestic and feral pigeons are very variable in colour and pattern. The rock dove has a restricted natural resident range in western and southern Europe, North Africa, and into South Asia. Rock doves have been domesticated for several thousand years, giving rise to the domestic pigeon (Columba livia domestica).