Differing from this species in the possession of a longer bill, in having much less white on its back, in the paler colour of its mantle, and in a few other points, is the ordinary American species, with at least three races, Haematopus palliates.
Leucopus, very similar to the first, but with a black wing-lining and paler legs, while the Australian Region possesses a fourth, H.
The fur of the dormouse is tawny above and paler beneath, with a white patch on the throat.
(B.) bezoartica, of the Argentine pampas is a much smaller animal, of paler colour, with three-tined antlers.