primate

In the late 1800s, German scientist Ludwig Edinger compared primate and crow brains and interpreted the crow’s brain structure as primitive, dismissing their cognitive abilities.

And if it worked on primates...

If it worked on rabbits, then maybe it'd work on primates.

The ability to form habits is one of the most important and amazing evolutionary tactics that the human race has come up with and all primates and almost all animals for that matter.