Published on br.de the 14.11.2018.
The parrots have the choice: food, or an object which they can exchange for better food. How will they decide?
Note: The series of experiments were run at Loro Parque and would not have been possible in nature. Such fundamental research, in the cognitive field, works for a better understanding of the parrots´ actions. Which again shows the importance of modern zoos and aquariums.