- 5th Aug, 2010. Approx 2 weeks ago I had the pleasure of two large glossy black cockatoos pecking at my tree after borers. I have tried to identify them by picture on the net but cannot find an identical likeness. It sounds like they are Yellow tailed black cockatoos but the plumage on these birds was truly beautiful. Glossy black but the tails were a soft yellow colour and the yellow was at the end of the tail feathers not mixed in with the black. The division of colour from black to yellow was very definate and almost scalloped across the span of the tail feathers. There was only two and the call was soft and inviting. Sadly went for the camera but wasn't quick enough. All other features seemed same as Yellow tailed but cant find that elusive picture to prove it.