<P> Grey parrots are also highly intelligent , having been shown to perform at the cognitive level of a 4 -- to 6 - year - old child in some tasks . New experiments have shown that grey parrots can learn number sequences and can associate human voices with those humans ' faces . Most notably , Dr Irene Pepperberg 's work with Alex the parrot showed his ability to learn over 100 words , differentiating between objects , colours , materials , and shapes . </P>
<P> Grey parrots are also highly intelligent , having been shown to perform at the cognitive level of a 4 -- to 6 - year - old child in some tasks . New experiments have shown that grey parrots can learn number sequences and can associate human voices with those humans ' faces . Most notably , Dr Irene Pepperberg 's work with Alex the parrot showed his ability to learn over 100 words , differentiating between objects , colours , materials , and shapes . </P>
how many words can a grey parrot learn
how many words can a grey parrot learn
over 100 words
over 100 words