 Recent research into imitation in animals has resulted in the tentative labeling of certain species of birds, monkeys, apes, and cetaceans as having the capacity for imitation.For example, a Grey parrot by the name of Alex underwent a series of tests and experiments at the University of Arizona in which scientist Irene Pepperberg judged his ability to imitate the human language in order to create vocalizations and object labels.Through the efforts of Pepperberg, Alex has been able to learn a large vocabulary of English words and phrases.