CLASS AVES. BIRDS 



451 



Cooper's hawk 



ea 



Figure 322. Representatives of selected orders of birds. Some adaptations are shown. 



tail feathers; they have a pecuhar hairiike 

 plumage throughout life and are credited 

 with a keen sense of smell which is unique 

 in birds. 



Aquatic birds 



Many birds spend a large part of their 

 time in or near the water and are adapted 



