318 COMPARATIVE ZOOLOGY. 
Fie. 300.—Wild Duck (Anas boschas). 
North America. 
4, Lamellirostres, or Ducks, have a heavy body, mod- 
erate wings, short tail, flattened bill, covered by a soft 
skin, with ridges along the edges. 
Diet more commonly 
vegetarian than animal. The majority inhabit fresh wa- 
ter—as the Ducks, Geese, Swans, and Flamingoes. 
B. TrrrestriAL Birps.— This group exhibits great 
diversity of structure; but all agree in being especially 
Fic. 301.—Sandpiper (Tringa hypoleuca), England. 
terrestrial in habit, 
spending most of the 
time on the ground, 
not on trees or the wa- 
ter, although many 
of them fly and swim 
well. The legs are 
long or strong, and 
top) 
the knee is free from 
the body. The hind 
toe, when present, is 
small and elevated. 
