mountains in background casting shadows in triangular in lake

light shining shape water helmbachweiher lake palatinate forest germany sunny winter day mountains trees background reflection nature river tree pond morning reservoir autumn wilderness landscape leaf sunlight shore wetland stream animal aquatic avian bad durkheim beak bird birds brown destination duck environment europe european fauna feather german natural ornithology outdoor outdoors park pattern pfalz rhineland ripple swim texture travel waterfowl wild wildlife wing woog casting shadows triangular