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either of two white sea birds, Chionis alba or C. minor, of the colder parts of the Southern Hemisphere: so called from the horny sheath covering the base of the upper bill.
either of two pigeon-like shore birds, Chionis alba or C. minor, of antarctic and subantarctic regions, constituting the family Chionididae: order Charadriiformes. They have a white plumage and a horny sheath at the base of the bill


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  • Sheathed

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