I have an amazon, macaw, cockatoo.
The macaw I have to say is my biggest thinker, the one who also never forgets and can hold a grudge.
He understands requests and often does them. He'll ignore/get mad if I insist and he's not in the mood.
At times will speak in context, saying things not usually said. He's not a big talker for the most part.
Usually talks when he wants something.
He also enjoys looking at photos, something neither of my other birds care to do.
The Too is by far the most clever. Always mischievous and pushing boundaries.
Her memory is fairly good also, she'll do tricks when my daughters stop by.
These are ones taught to her over 15 years ago. She never does them except when my girls show up.
She can and will repeat actions she sees (like letting other birds out). I have to watch what I show her.
I love my amazon to death, but sadly he's about as smart as a box of rocks.
Can't even find an alternate exit (opened feed door), not even after I've pointed it out to him over and over again, and the Too is using it.
He likes to interact, but I don't really see any reasoning with the things he does in context to what I'm doing.