Papers in the Biological Sciences

 

Date of this Version

6-1973

Comments

Published in Science, New Series, Vol. 180, No. 4090 (June 8, 1973), pp. 1076-1078; Copyright © 1973 by the American Association for the Advancement of Science. Used by permission.

Abstract

Laboratory-raised Northern blue jays (Cyanocitta cristata) have been observed tearing pieces from pages of newspaper and utilizing them as tools to rake in food pellets which were otherwise out of reach. The frequency of this behavior was dependent upon the motivational state of the jay and the presence of food pellets.