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How do African grey parrots (Psittacus erithacus) perform on a delay of gratification task?

Breeding BehaviorAnimal BehaviourBehavioral SciencesCognitive ScienceForagingBehavioral NeuroscienceSocial BehaviorDo AfricanGratification TaskEducationAvian EvolutionComparative PsychologySocial SciencesExperimental PsychologyAnimal BehaviorPsychology