Butron, Robert. <br/><br/>
How birds live / 
Robert Burton. 
 - New York, N.Y. :  Elsevier-Phaidon,  1975. 
 - 160 p. : ill. 
 - How animals live. .
<br/><br/> Includes index.  Contents : Classification of the class aves--Mastery of the air. 
<br/><br/><label>ISBN: </label>0729000222 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Birds--Juvenile luterature.<br/>Birds--Behaviour.