https://mymodernmet.com/alex-the-african-gray-parrot/
Alex the Parrot Was the First Animal To Ask an Existential Question
Dec 30, 2020 - Alex was the first African gray parrot to be trained and tested by Dr. Irene Pepperberg and the first animal to ask an existential question.
alex the parrotfirst animal
https://www.taipeitimes.com/News/feat/archives/2007/09/15/2003378947
Alex the parrot: prodigy or bird brain? - Taipei Times
Sep 15, 2007 - Bringing Taiwan to the World and the World to Taiwan
alex the parrotbird brainprodigytaipeitimes