Hey also If you open the wing out on a young male wood duck you may see the green speculum starting to appear on his flights. Pacific Black Ducks seem to have their speculum more visible than the Australian wood duck.
I did some research and found some interesting information Australian Wood Duck is found in grasslands, open woodlands, wetlands, flooded pastures and along the coast in inlets and bays. It is also common on farmland with dams. As you have a dam Hmmmm