鹦鹉Griffin和Athena的智力与三至五岁的人类小孩相比，结果如何呢？一起来看看Irene的实验吧。
Talking parrots and the origins of human intelligence
Unlocking the Genius of the Dog Who Knows a Thousand Words
What Do Animals Think and Feel?
Testing Elephants Intelligence
Inside the minds of animals
Alex the parrot