system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How is it that crows can be as intelligent as a 7 year old kid, but their brains are so much smaller? What is the correlation of brain size to intelligence?
gpt
Crows can do some things as well as a 7 year old child, not all things.  They certainly can't control a child-sized body with the broad spectrum eyes that a child has.  They can't control the complex vocal mechanisms like a child can.

They can do about as well on some types of intelligence tests, that's far from doing everything as well.  At the very least they lack a 7 year old's ability to learn and process abstract ideas like calculus.

On the other hand, they can control their bird body, and **they can fly**, which a child certainly cannot (no matter what they think).  They are just not very much like a child, so they need a very different brain.