Common Merganser male or Mergus merganser coming behind boulder searching for food in a river

mergus merganser common merganser upstream habitat sea duck river stream wildlife migratory birding environment biodiversity northern finland male nature water ornithology sleet species animal birdwatcher swimming bird aquatic birdwatching background finding wild spring natural alone tripod under falling snorkeling europe cold raining wet snowing bad nobody biology looking copyspace education educational weather