The rock-pigeon is of a slaty-blue, with white loins; but the Indian sub-species, C.intermedia of Strickland, has this part bluish.

The tail has a terminal dark bar, with the outer feathers externally edged at the base with white.

The wings have two black bars.
Some semi-domestic breeds, and some truly wild breeds, have, besides the two black bars, the wings chequered with black.

These several marks do not occur together in any other species of the whole family.

Now, in every one of the domestic breeds, taking thoroughly well-bred birds, all the above marks, even to the white edging of the outer tail-feathers, sometimes concur perfectly developed.