sheath·bill /ˈʃiθˌbɪl/
栖息于南極的海鳥
Sheath·bill n. Zool. Either one of two species of birds composing the genus Chionis, and family Chionidae, native of the islands of the Antarctic seas.
Note: ☞ They are related to the gulls and the plovers, but more nearly to the latter. The base of the bill is covered with a saddle-shaped horny sheath, and the toes are only slightly webbed. The plumage of both species is white.
◄ ►