single herring gull bird - latin larus argentatus - on a water surface during the spring mating season in wetlands of north-

herring gull larus argentatus mewa srebrzysta narew biebrzanski national park narwianski bird pond lake water surface swim reserve avian wetland wetlands moor moors lakeland wildlife nature natural life ecology fauna poland europe wing wings beak tail neck color colorful wild zoology travel exterior outside outdoor one single alone white reflection mirror