I was able to photograph a group of about five White-winged Choughs who were walking through a sunny patch towards where I was standing. While I was photographing these choughs there was a call from further up the hill, possibly from a Noisy Friarbird, and all the bird life changed their behaviour. The choughs took to the trees, looking around them; the one I was paying attention to flinched at a shadow of another bird. I wondered if they knew that call signalled an aerial threat, as a little further up the hill I saw two friarbirds agitated by the presence of a Brown Goshawk.