Alex & ich: Wie ein Wissenschaftler und ein Papagei eine verborgene Welt von Tier-Inte entdeckten
20,93 €
His last words to his owner, Irene Pepperberg, were 'You be good. I love you. Yet, over the years, Alex proved many things. He could add. He could sound out words. He understood concepts like bigger, smaller, more, fewer, and none.
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