 What is so unique about the cockatoos on this planet?
He could be excused this time, however, for this was only our third day on Jupiter's Eighth Moon, and the country was still strange to us. Blood-and-thunder as these books are, however, they have one redeeming feature—authenticity of background. "There are two principal forms of life in the Baldric; flagpole trees and a species of ornithoid resembling cockatoos. The cockatoo repeated my last statement again, then rose on its short legs, flapped its wings once and soared off into the sky. For some time I had fixed my gaze on a dot in the sky which I supposed to be a high-flying cockatoo.
 They are able to physically mimic any picture.
 They are able to copy speech.  They live in abundance in the Baldric, despite it being a dangerous area.  They are identical to Earth parrots, despite being on a different planet.  They are able to physically mimic any picture.