Adult male on top, family group on bottom. Our field guides call this bird the "Australian Wood Duck" but Clements and most other authorities use "Maned Duck." Males have a narrow black "mane" down the middle of their nape. Seeing these birds grazing reminded me of small geese. In fact they are sometimes called "Maned Geese." However genetic studies have found they are more closely related to Shellducks than they are to geese. They are in their own genus endemic to Australia. Canon PowerShot SX60 HS.
References:
Carboneras, C. & Kirwan, G.M. (2019). Maned Duck (Chenonetta jubata). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona. (retrieved from https://www.hbw.com/node/52856 on 28 December 2019).
Frost, P.G.H. 2013 [updated 2017]. Australian wood duck. In Miskelly, C.M. (ed.) New Zealand Birds Online. www.nzbirdsonline.org.nz
Marchant, S.J.; Higgins, P. (eds) 1990. Handbook of Australian, New Zealand and Antarctic birds. Vol. 1, ratites to ducks. Oxford University Press, Melbourne, Australia.