birds circles dark ducks fauna light movements moving native fauna pond reflections ripples rippling silhouettes swimming three water water birds water fowl wild ducks wild life bird clouds duck fly flying sky wild alligator background bushes lake marsh natural nature park plant rural scenic tree trees wet animal depth feathers plumage river shadow stones stream sunlight surface swim tidal wave waves white wings anas-superciliosa aquatic-birds bank black-eye-stripe brown-duck chroicocephalus-novaehollandiae color colour common differences diversity edge fowl grass grassy gray-and-white grey-and-white grey-duck gulls harmonious harmony lakeside Larus-novaehollandiae non-threatening not-threatened Pacific-black-duck quiet relaxed relaxing resting seabirds seagulls shadows silver-gull slope sunshine together waiting waterbirds waterfowl widespread wild-ducks wild-life appearance aquatic bird Australian circular native-fauna omnivore omnivorous peaceful placid swamp-hen textures animals duckling little duck beak cute feather head wildlife wing zoo beautiful Dendrocygna eytoni eyes Eyton's Plumed Grass Whistle Duck Grey or Red-legged Whistler Monkey Duck native ornithology plumed pretty Red-legged or Whistling Tree-duck standing Tree Duck wandering webbed feet whistling mates one leg pair walking