Four Black-tailed Gull Perch On Fence In The Marina Of Ganghwado Island In South Korea

seagull seabird pier sea bird wharf gull dock harbour port seaside bird south korea preen sea avian perch harbor blacktailed gull environment fence island east asia stand beak sit national geographic fly nature nat geo ocean rest calm behavior habitat wing marine sky water mountain no people blacktailed natural native animal marina four feather planet domestic