Attenborough, Richard,  1926- <br/><br/>
Theme and variations  [videorecording] 

 - Wilmette :  Films Inc.,  1981 
 - 1 videocassette (U-matic) (58 min.) :  sd., col. ;  3/4 in. 
 - Life on earth [videorecording] ;  no.10 .
<br/><br/> Naturalist David Attenborough describes some of the diverse specialization which mammals have evolved to obtain food, to move, to navigate, and in some cases to communicate 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mammals--Evolution<br/>Mammals--Behaviour