When we were overnighting in Moree last year we came out of the Bowls Club where we had dinner and could hear a cacophony of squawks, grunts and trumpeting. At first I thought it was Brolgas at the local wetland getting frisky. It was getting dark, but we went off to investigate nonetheless.
The row turned out to be flying foxes, a type of large bat, also known as fruit bats. They were obviously preparing for the night's foraging, calling out to one another, squabbling and engaging in a bit of recreational gymnastics in the trees around the billabong.
Because of the low light, we didn't get any very good photos, but we enjoyed watching them for a bit. I imagine they've outworn their welcome with anyone who lives nearby though -- they are noisy and stinky and they eat all your fruit and flowers.
For a picture of flying foxes in daylight, see this one I took on a previous trip to Australia.