diagnostics
97 cm, 2 kg. Sexes similar in plumage, but males are larger. Wing feathers and tail black. Back, wing coverts, breast and belly white, tinged pink, with reddish tips to some feathers. Bill bright yellow, thicker at base, long and slightly decurved. Bare facial skin orange-red. Legs red. When breeding, the colours of certain features intensify. First-year birds are generally greyish brown with dark brown wings and tails, greyish yellow bills, dull orange faces and greyish legs (del Hoyo et al. 1992, Anderson 2005).
