http://www.pnas.org/content/early/2016/06/07/1517131113.abstract.html?etoc
Never call someone a "bird brain" again! This report has been a long time coming and shows that many bird species cram an unbelievable number of neurons into the forebrain of brains no bigger than a nut. There are more neurons in the forebrain of a bird with a brain the size of a walnut than a macaque with a brain the size of a lemon.
Never call someone a "bird brain" again! This report has been a long time coming and shows that many bird species cram an unbelievable number of neurons into the forebrain of brains no bigger than a nut. There are more neurons in the forebrain of a bird with a brain the size of a walnut than a macaque with a brain the size of a lemon.