beak bird cob crowded Cygnus olor England english feathers flock Great Britain group mute natural nature neck peck plumage preen swan swim uk waddle walk waterfowl white Windsor calf dolphin mother river swimming action active activity boat boats enjoy enjoyable mobility motion movement outdoors outside pastime power quick recreation recreational safety speed spray spring tourists trail transport transportation travel wake water waterways waves across the river background buildings business district city city central cityscape culture late afternoon light lighting modern Perth river views riverside setting sun shadow shadows skyscrapers sunlight surfaces sailing water sport