Hence the names peewit, peaseweep and teuchit, commonly applied in some parts of Britain to this bird - though the first is that by which one of the smaller gulls, Larus ridibundus (see Gull), is known in the districts it frequents.
Of the genera recognized by him, Pagophila and Rhodostethia have but one species each, Rissa and Xenia two, while the rest belong to Larus.
On the lakes there is a very handsome goose, with white body and dark-green wings shading into violet, called huachua, two kinds of ibis, a large gull (Larus serranus) frequenting the alpine lakes in flocks, flamingoes called parihuana, ducks and water-hens.
The largest species known is the Stercorarius catarrhactes of ornithologists - the "Skooi" or "Bonxie" of the Shetlanders, a bird in size equalling a herring-gull, Larus argentatus.
The more common sea-birds are the Sula variegate or guano-bird, a large gull called the Larus modestus, the Pelecanus thayus, and the Sterna Ynca, a beautiful tern with curved white feathers on each side of the head.
We have then the genus Larus, which ornithologists have attempted most unsuccessfully to subdivide.
Yellow-legged Gull (Larus cachinnans Atlantis) Recorded on small numbers (less than ten at any one site) around the coast.