PhysOrg Posted December 18, 2017 Share Posted December 18, 2017 To look at him, Griffin doesn't seem like he'd be smarter than your typical 4-year-old—he's a bird, after all. Yet the African grey parrot can easily outperform young children on certain tests, including one that measures understanding of volume. Read the full article on PhysOrg Link to comment Share on other sites More sharing options...
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