Study in question: https://sci-hub.st/http://dx.doi.org/10.1016/j.anbehav.2009.1...

		Modified3019 on Aug 31, 2024 \| parent \| context \| favorite \| on: Crows are even smarter than we thought Study in question: https://sci-hub.st/http://dx.doi.org/10.1016/j.anbehav.2009....