Convergent evolution

Convergent evolution seen in “hardwiring” of brains to perceive numbers

Crows don’t have a prefrontal cortex so, as Offord notes, [the researchers] suggested convergent evolution (convergence on a common goal rather than common ancestry) as an explanation [for having skills similar to macaques’]. Even so, they say, the quality is probably innate. [Interesting, how often convergent evolution is invoked these days.]