On the trail up from the falls we stumbled on this female bird:

It's the superb lyre bird of course. The male copies all the other birds, even making SLR shutter and motor noises as well as chainsaw noise. More from Sir David Attenborough:

Click fo Sir David Attenborough link

Unfortunately, the blokes only partake in all this malarky when they're after the ladies: she was already paired up with a lad nearby.