young mute swans swim along the wuhle river with snow-covered banks in winter. berlin, germany

species swan nature young mute anatidae animal berlin bird birds black brown climes cygnus olor family feathers frost germany grey leaves member waterfowl river season shore snow swans warmer water weather white wild wildlife wing winter winters landscape trees snowy ice frozen swim along wuhle snow-covered banks swims vula which has not flown away its have