One of the first things we noticed after arriving in Cairns was how many bats there are. We were sitting outside eating dinner during sunset on the first night we were there, and hundreds of bats began to fly over. It was really cool to watch, and they seemed to just keep coming because there were so many.
The next night we were walking into the central area and saw (and heard) a tree that was full of bats. They were all hanging from the branches and making a lot of noise. I have never seen so many bats, especially ones that big.
Hammond Adventures 