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      Cover image for Alex & me : how a scientist and a parrot discovered a hidden world of animal intelligence--and formed a deep bond in the process
      Pepperberg, Irene M.
      1st ed.
      This story of Alex, a famous African Grey parrot, documents his thirty-year relationship with his trainer and the ways in which his life has chan
      Cover image for The Alex studies : cognitive and communicative abilities of grey parrots.
      Cover image for Animal cognition in nature : the convergence of psychology and biology in laboratory and field