It was recently discovered that birds, like primates, have a number of neurons in their brains that scales linearly with brain volume. http://www.pnas.org/con

It was recently discovered that birds, like primates, have a number of neurons in their brains that scales linearly with brain volume. http://www.pnas.org/content/113/26/7255.full http://www.pnas.org/content/113/26/7255.full That's pretty impressive in the animal kingdom.