VERTEBRATA. 



331 



und feed on Fishes, Mollusks, and Insects. Examples are 

 the Cormorants, Pelicans, and Gaimets. 



4. Lamellirostres, or Ducks, have a heavy body, moder- 

 ate wings, short tail, flattened bill, covered by a soft skin, 

 X 



FIG. 311. Wild Duck (Anas boschas). North America. 



with ridges along the edges. Diet more commonly vege- 

 tarian than animal. The majority inhabit fresh water 

 as the Ducks, Geese, Swans, and Flamingoes. 



B. TERRESTRIAL 

 BtRDsThis group 

 exhibits great diver- 

 sity of structure ; but 

 all agree in being es- 

 pecially terrestrial in 

 habit, spending most 

 of the time on the 

 ground, not on trees \ 

 or the water, al- -^ 

 though many of them "^j 



fly and Swim Well. FIQ. 312. Saudpiper (Tringa hypoleuca). Euglnnd. 



