Alex was a grey parrot and the subject of a thirty-year experiment by animal psychologist Irene Pepperberg, initially at Purdue University, then the University of Arizona and later at Harvard Universi

The grey parrot, also known as the Congo grey parrot, is an African parrot in the family Psittacidae. Psittacus erithacus was previously also known as the African grey parrot until the Timneh parrot,