The Australian Wood Duck, Maned Duck or Maned Goose (Chenonetta jubata) is a dabbling duck found throughout much of Australia. This 45–51 cm duck looks like a small goose, and feeds mostly by grazing in flocks. The male is grey with a dark brown head and mottled breast. The female has white stripes above and below the eye and mottled underparts. Both sexes have grey wings with black primaries and a white speculum. Wikipedia
From left to right then, the male and the female. I only get on try (3-4 pictures) with this one by chance successful. The ducks group took-off to join the other riverside, far away.