appearance bird color coloring colour colouring common dark dark-water domestic duck fairly-large farm-bird fowl paddling park pond poultry public reflecting reflection swimming urban water water-bird water-fowl white white-plumage widespread wild wildlife aeroplane aircraft airplane angled angles atmosphere blue bright changing cloud clouds colorful colourful contrast contrasting dark-clouds darkening darkness distant disturbing dramatic dusk evening foreboding formations gray grey layers levels light lighting moody nature plane rays silhouettes skies sky sloping sunlight textures threatening trees weather abstract abstraction background black colours green magenta orange red texture yellow apocalyptic breaking-through dark clouds frightening spreading colored colors coloured conditions heavy Morning movement perspectives shapes shining sun sunrise variations various cloud formations christian church cross decorative glass Norwich pattern stained window windows