The sheathbills are the two species of birds in the genus Chionis in the Chionididae family. They are confined to Antarctic regions.

They have white plumage, with only the face and leg colours distinguishing the two species. They look plump and dove-like, but are believed to be similar to the ancestors of the modern gulls and terns.

They derive their English name from the horny sheath which partially covers the upper mandible of their stout bills.

The sheathbills are scavengers, but will take chicks and eggs as well as offal.

They lay 2 or 3 blotchy white eggs on the ground.

The two species are the Snowy Sheathbill (Chionis alba) and the Black-faced Sheathbill (C. minor). Image:Black faced sheathbill.jpg|Black-Faced Sheathbill

External links

• Sheathbill videos on the Internet Bird Collection

Charadrii | Antarctic birds

Scheidenschnäbel | Chionididae | כיאוניסיים | თეთრი მეჭვავიასებრნი | IJshoenders | Chionididae