black eye lines reflection skin stripe tick zebra horse lins mane anas superciliosa aquatic bird Australian bird black eye-stripe brown duck common dark-brown duck fauna fowl grey duck omnivore omnivorous Pacific black duck waterbird waterfowl widespread wild duck ripples rippling swimming water anas-superciliosa aquatic-bird black-eye-stripe brown-duck grey-duck Pacific-black-duck pond wild-duck light paddling reflecting reflections sunlight sunshine surface surfaces wild-life chick direction ducklings follow follow-the-leader following guidance guiding lead leading mother protection protective shade shadows appearance background color colors colour colours dark lake nature pair texture textured textures ahead chicks wetlands