Many of Alex's cognitive skills, such as his ability to understand the concepts of "same" and "different," are generally attributed only to higher mammals, particularly primates such as humans and apes. But parrots, like great apes (and humans), live a long time in complex societies. And like primates, these birds must monitor the changing relationships within the group, This may explain Alex's ability to learn a human language. "When we take [parrots] into captivity, what they start to do is treat us as their flock," explains Pepperberg. Parrots learn to pronounce and use our words so they can become a part of our group
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