A common name for the Darter is Snake Bird. If one approaches one sitting on a log or branch it will writhe its neck in a snake like manner. Like cormorants, the Darter needs to regularly leave the water and sit on a log, rock, branch or navigation piles in order to dry its wings.
I spied this at Lilydale Lake while out for a walk and hopefully some bird spotting. I have more pics at Flickr