
The crab-plover or crab plover (Dromas ardeola) is a bird related to the waders, but sufficiently distinctive to merit its own family Dromadidae. Its relationship within the Charadriiformes is unclear, some have considered it to be closely related to the thick-knees, or the pratincoles, while others have considered it closer to the auks and gulls....
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http://en.wikipedia.org/wiki/Crab-plover

(species Dromas ardeola), long-legged, black and white bird of Indian Ocean coasts, related to plovers and allied species of shorebirds. It ... [1 related articles]
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http://www.britannica.com/eb/a-z/c/153

a black and white wading bird, Dromas ardeola, of the northern and western shores of the Indian Ocean.
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https://www.infoplease.com/dictionary/crab-plover
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