N'kisi, a gray parrot dazzles the Docs:
The finding of a parrot with an almost unparalleled power to communicate with people has brought scientists up short.
The bird, a captive African grey called N'kisi, has a vocabulary of 950 words, and shows signs of a sense of humour.
He invents his own words and phrases if he is confronted with novel ideas with which his existing repertoire cannot cope - just as a human child would do.
He uses words in context, with past, present and future tenses, and is often inventive.
One N'kisi-ism was "flied" for "flew", and another "pretty smell medicine" to describe the aromatherapy oils used by his owner, an artist based in New York.
When he first met Dr Jane Goodall, the renowned chimpanzee expert, after seeing her in a picture with apes, N'kisi said: "Got a chimp?"
He appears to fancy himself as a humourist. When another parrot hung upside down from its perch, he commented: "You got to put this bird on the camera."
Dr Goodall says N'kisi's verbal fireworks are an "outstanding example of interspecies communication".