African grey parrots let their personalities shine through when it comes to problem-solving, a study has found.
Scientists developed a series of tasks for the birds, which revealed that they understood how to co-operate.
A team studying the birds at a research centre in Paris found that some birds preferred to work alone, while others liked to work together.
The findings are published in the journal Animal Cognition.
The problem-solving test the researchers designed was a miniaturised version of one that was originally developed to test chimpanzees' ability to work in teams.
Rest of article, with a video of the Parrots working together: http://www.bbc.co.uk/nature/12913981