THE SEA-BIRDS. 367 
The marine birds may be divided into groups, according to 
the waters they frequent. 
The Long-wings, such as the albatross and the petrel, live on the 
SEA GULLS. 
(Larus argentatus.) 
open sea. They are found at great distances from land, and 
seldom approach the shore. 
The Ordinary sea-birds, such as the gulls, never are seen far 
from land, because they always roost on shore. 
The Riverside-birds, such as wild ducks, which prefer the ponds 
