While not a scientific article, here's an interesting read about corvids (crows, jays) presenting two sides of the argument that the birds possess theory of min

While not a scientific article, here's an interesting read about corvids (crows, jays) presenting two sides of the argument that the birds possess theory of mind: http://io9.com/5969515/corvids-the-birds-who-think-like-humans http://io9.com/5969515/corvids-the-birds-who-think-like-huma...