Large. Long necked, long thin straight bill, and extremely long thin legs. Sexes similar.
Male: Breeding: All white except, back, hind neck, wings, both above and below, black. In flight legs extend well beyond tail. Eye, red. Bill, black. Legs, pinkish to pinkish-red. Non-breeding: Similar but crown and hind neck may become greyish.
Female: Like male but back has brown tones.
Immatures: Crown and hind neck greyish to almost black. Back, wings, dark brown. Feathers edged with buff giving a scaly appearance. Legs, pinkish-red.
Other Names (World)
Pied Stilt, White-headed Stilt, Black-winged Stilt (when considered a subspecies)
Pied Stilt (Himantopus leucocephalus) [XC46624]
by Peter Boesman from Ferrymeade Estuary, Christchurch, South Island, New Zealand (call)
Pied Stilt (Himantopus leucocephalus) [XC776112]
by James Lambert from Roebuck Plains, Shire of Broome, Western Australia, Australia (call)
Subspecies
Black-winged Stilt (Himantopus himantopus) and White-headed Stilt (Himantopus leucocephalus) are retained as separate species by BirdLife International whereas Christidis and Boles (1994) and Turbott (1990) include White-headed Stilt (Himantopus leucocephalus) as a subpecies of Black-winged Stilt (Himantopus himantopus). Black-necked Stilt (Himantopus mexicanus) and White-backed Stilt (Himantopus melanurus) have been lumped into Himantopus mexicanus following AOU (1998), SACC (2006) and a review by the BirdLife Taxonomic Working Group.
Considered by some authors to be a subspecies of Black-winged Stilt (Himantopus himantopus).