Auersperg, A M I <br/><br/>
Tool making cockatoos adjust the lengths but not the widths of their tools to function.  [electronic resource] 

 -  PloS one  2018 
 - e0205429 p.  digital 
<br/><br/> Publication Type: Journal Article; Research Support, Non-U.S. Gov't 
<br/><br/><label>ISSN: </label>1932-6203 
<br/><br/><label>Standard No.: </label>10.1371/journal.pone.0205429  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Cockatoos<br/>Female<br/>Learning<br/>Male<br/>Parrots<br/>Tool Use Behavior