Well, it has been shown that birds have twice the density of neurons to mammals, and their brain is larger as a proportion of body mass: https://www.pnas.org/doi/10.1073/pnas.1517131113
So their brain can be equivalent to a much larger primate.
So their brain can be equivalent to a much larger primate.
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.
we know nothing of their coordination and base everything on whats equivalent to parameters size