mouser Parrots tend to pull their own feathers when they are under stress and not happy.
kingofthenothing In a related video, Alex is dead, and that chick is WAY old now.
Oscar Wildcat That old Clever Hans fraud just never gets old, does it?
Eroticus E Yeah, because there's no difference between the cognitive abilities of an African Grey parrot and a horse. Even if the whole Alex thing were a "fraud" there's still plenty of evidence that some types of birds have intelligence in the same range as great apes.