Buckley, P A <br/><br/>
Foot-paddling in four American gulls, with comments on its possible function and stimulation.  [electronic resource] 

 -  Zeitschrift fur Tierpsychologie  Sep 1966 
 - 395-402 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0044-3573 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Animals<br/>Behavior, Animal<br/>Birds<br/>Consummatory Behavior<br/>Eating<br/>Instinct<br/>Motor Activity<br/>Reinforcement, Psychology