Jackdaw (Corvus monedula), an Old World species of the type-genus of the Crow family. It is a little more than a foot in length, with black plumage, glossed on the wings with purple, and dark grey neck. It is a native of Britain, and feeds on insects, worms, and molluscs. Jackdaws nest socially in holes in cliffs, in trees, ruins, church towers, and sometimes in chimneys. They have considerable power of mimicry, and are often kept as pets.