ahead anas-superciliosa aquatic-bird Australian bird black-eye-stripe brown-duck chicks common dark-brown direction duck ducklings fauna fowl grey-duck guidance guiding lake lead leading mother omnivore omnivorous Pacific-black-duck protection protective reflecting reflections ripples rippling sunlight sunshine surface surfaces swimming water waterbird waterfowl wetlands widespread wild-duck beak ducks geese and swans seabird swan water bird wildlife birds chick pond swans swim young