Bird brain? Ounce for ounce birds have significantly more neurons in their brains than mammals or primates
The macaw has a brain the size of an unshelled walnut, while the macaque monkey has a brain about the size of a lemon. Nevertheless, the macaw has more neurons in its forebrain — the portion of the brain associated with intelligent behavior — than the macaque. That is one of the surprising results of the first study to systematically measure the number of neurons in the […]