America aquamarine blue boulder clean clear cold fast flow natural nature pool pure river rock transparent water conifer forest tree bank current Devon England english Great Britain peace quality spring Tamar trees aggressive Australian birds breeze chroicocephalus-novaehollandiae colors colours common cool cooling edge edges edging feathered feathers flowing gray-and-white grey-and-white gulls huddled Larus-novaehollandiae Noisy path pavement paving prolific reflecting resting ripples rippling river's-edge riverside ruffled ruffling scavengers screeching seabirds seagulls silver-gull standing waiting watching waterbirds wind Bedfordshire freshen green oxygenate rural shallow weir fierce mountain norway norwegian rapid slope strong cloud dordogne ecology France french fresh sky waterweed Athabasca calm canada landscape mountains peaceful tranquil field meadow mole quiet rustic Surrey