TL;DR: Laboratory-raised Northeirn 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.
Abstract: Laboratory-raised Northeirn 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 dependenit upon the motivational state of the jay and the presence of food pellets.
TL;DR: CoLLIAS as discussed by the authors is a good book, fulfilling a need that the editor discerned, and should be very helpful to many people seeking an authoritative introduction to the study of social behavior in birds and mammals and to the work of some of the best known researchers in this area.
Abstract: all. It is well illustrated with many graphs and significant drawings, although the latter were apparently not done by professional artists. This is a good book, fulfilling a need that the editor discerned, and it should be very helpful to many people seeking an authoritative introduction to the study of social behavior in birds and mammals and to the work of some of the best known researchers in this area.-N. E. COLLIAS.