Head pure white. Neck hackle white with distinct broad black stripe down the centre of each feather, free from white shaft, such stripe to be entirely surrounded by a clearly defined white margin, finishing with a decided white tip, free from black outer edging, black tips and excess of greyness at the throat. Saddle hackle pure white.
Tail, main feathers black with beetle green sheen; coverts black with beetle green sheen either laced or not with white. Wings, primaries black or black edged with white; secondary, black on the inner edge and white on the outer edge; remainder pure white, entirely free from ticking. Under colour; white, bluish-white or light slate, not to be visible when feathers are undisturbed.