Wakefield, Ali. <br/><br/>
Those calculating crows! 

 - c1996. 
 - New York :  Simon and Shuster Books for Young Children,  1996. 
 - unp. :  col. illus. 
<br/><br/> When Roy tries to keep a flock of crows from his crops, it appears that these birds know how to count. 
<br/><br/><label>ISBN: </label>0689804830 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1) Counting.<br/>Birds.<br/>Crows.