African greys, while small, have a brain that is more like a palm pilot or a 4G phone. They are exceedingly clever and have the capacity to do simple math and remember names. What I love the most is how they like music and will dance to songs they like. A friend of mine had one that rocked out the most to John Denver's "Thank God I'm a Country Boy." It was very cute to watch as he bobbed his head and did little karate kicks.