Alex - Alex Foundation
Inside Dr. Pepperberg's Lab: A Parrot's Concept Of Same-Different – Pet Birds by Lafeber Co.
Watch this brilliant bird: Apollo, an African grey parrot, amazes internet with his smarts, vocabulary
Dr. Pepperberg's Avian Cognition Lab Celebrates 45th Anniversary! – Pet Birds by Lafeber Co.
Alex (parrot) - Wikipedia
Alex the African grey baby : r/parrots
Harvard study shows parrots can pass classic test of intelligence — Harvard Gazette
Was Alex, the famous African grey parrot self-aware? - Quora
Alex & Me | Book | Scribe Publications
Pathways - Chapter 2 - Alex the Parrot - YouTube
ALEX - One of the most smartest parrots ever! - YouTube
Alex - Alex Foundation
Gifted research parrot Alex found dead
File:2007-10-28 AfricanGrayParrot Meru.jpg - Wikimedia Commons
Alex, a Parrot Who Had a Way With Words, Dies - The New York Times
Why Do Parrots Talk? | Audubon
Parrot who learned to say 'I love you' and mean every word! | Daily Mail Online
Alex the Parrot Was the First Animal To Ask an Existential Question
Wait, what? Alex, the parrot with a little human brain – Diff
Honoring African Grey Alex - Win A Copy Of His Memoir DVD | So Much PETential
Alex - Alex Foundation
