anas-superciliosa aquatic-birds bank birds black-eye-stripe brown-duck chroicocephalus-novaehollandiae color colour common differences diversity ducks edge fauna fowl grass grassy gray-and-white grey-and-white grey-duck gulls harmonious harmony lake lakeside Larus-novaehollandiae non-threatening not-threatened Pacific-black-duck quiet relaxed relaxing resting seabirds seagulls shadows silver-gull slope sunlight sunshine together waiting water waterbirds waterfowl widespread wild-ducks wild-life african broad-mouthed close close-up cow creases endangered eye eye-lashes eye-lid flat-mouthed folds gray grazer grey heavy herbivore herbivorous hide large lattice-structured mammal megafauna mother odd-toed-ungulate perissodactyl placid powerful rhino rhinoceros skin southern-white-rhinoceros square-lipped rhinoceros strong thick threatened tough white rhinoceros wide-lipped rhinoceros wrinkled wrinkles