Crows reach fabulous levels of (animal) intelligence with a brain that is a fraction of the size of the brain of great apes. I wonder what progress has been made in studying the differences in organisation between the two.
So their brain can be equivalent to a much larger primate.
we know nothing of their coordination and base everything on whats equivalent to parameters size
There's a lot of surprising things about them, like puzzle solving, some evidence of a capacity for play and the ability to select food not just for nutrition but for apparent enjoyment.
It showed a chart of brain weight relative to body weight, and birds had a much higher ratio than any other animal group. Primates were on the same curve, which wasn't shared with any other mammalian group. Primates were literally on the avian curve.
But I don't remember where I saw that. I searched for it on Google and found nothing.
Crows have a higher raw brain-to-body mass ratio (about 2.7% for ravens) compared to adult humans (about 1.9%), so not exactly surprising they are smart.