beak bird black bill black crown bright eyed cinnamon cleaning colored coloring colors coloured colouring colours fauna head plumes Heron long white head plumes long yellow legs Nankeen night heron nocturnal nuptial plumes nycticorax caledonicus omnivore omnivorous perched plumes rufous night heron secretive sharp sharp eyed shy stocky waterbird widespread wildlife adult-birds appearance aquatic-bird Australia-wide Australian Australian-wood-duck chenonetta-jubata common dark-brown duck family feeding Females forage foragers foraging fowl gray graze grazing grey juveniles males maned-duck maned-goose mottled perching-duck protection protective walk walker walking waterfowl wild-duck anas-superciliosa background black-eye-stripe brown-duck color colour dark grey-duck lake light nature Pacific-black-duck paddling pair reflections ripples rippling surface surfaces swimming texture textured textures water grooming preening ahead chicks direction ducklings guidance guiding lead leading mother reflecting sunlight sunshine wetlands