Cooperative problem solving in African grey parrots (Psittacus erithacus)

@article{Pron2011CooperativePS,
  title={Cooperative problem solving in African grey parrots (Psittacus erithacus)},
  author={Franck P{\'e}ron and Lauriane Rat-Fischer and Mathilde Lalot and Laurent Nagle and Dalila Bovet},
  journal={Animal Cognition},
  year={2011},
  volume={14},
  pages={545-553}
}
One of the main characteristics of human societies is the extensive degree of cooperation among individuals. Cooperation is an elaborate phenomenon, also found in non-human primates during laboratory studies and field observations of animal hunting behaviour, among other things. Some authors suggest that the pressures assumed to have favoured the emergence of social intelligence in primates are similar to those that may have permitted the emergence of complex cognitive abilities in some bird… 
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