As we walked around Lake Burley Griffin we saw many water birds. Odile and Odette would have felt at home with the black swans. (Yes, this old tragic could not help but a few steps from Swan Lake.) Some were swimming but most that we saw were on the grass.
These swans were not fazed in the slightest by people nearby. They all had white patches under their wings but I could not manage to snap a photo showing that. Maybe you can see just a peek of white feathers.
I know I have seen black swans in the wild before, but can not remember where.